Synthesis of Cobalt ferrite by Solid Reaction Methodsank_sanjay
Cobalt ferrite nano-crystalline powder was synthesized from the powder mixture of cobalt carbonate and iron oxide by mixed oxide ceramic method. The effects of temperature of calcination as well as molar ratio of CoCO3/Fe2O3 on the phase structure, morphology and magnetic properties of the products were studied using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and vibrating sample magnetometer (VSM) techniques, respectively. The samples calcined at 800 and 900˚C consisted of cobalt ferrite, iron oxide and cobalt oxide. In the sample calcined at 1000˚C, the reaction was completed and single phase CoFe2O4 with a mean crystallite and particle sizes of 49 and 300 nm, respectively was obtained.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Preparation, Structure, and Characterization of Nd2mo2o9 fast Oxide Ion Condu...IJARIIT
The structure and ion conductivity of Nd2Mo2O9powders were synthesized by using Nd(NO2)3, MoO3, and aspartic acid (fuel) in assisted combustion method with heating at 550˚C for 6 hours. The thermal decomposition, phase identification, morphology, ionic conductivity of the samples were studied by TGA/DTA, XRD and SEM four probe D.C. method respectively. The formation of Nd2Mo2O9 was confirmed by FTIR studies. The synthesis and crystallization were followed by thermochemical techniques (TGA/DTA) studies. The synthesized materials showed reasonable ionic conductivity. These results indicate that assisted combustion method is a promising method to prepare nanocrystalline Nd2Mo2O9 for solid oxide fuel cell.
Optical and Electrical Properties of TiO2 Doped Fe2O3 Thin Film Prepared by S...IJAEMSJORNAL
In this work, iron oxide (Fe2O3) and titanium oxide (TiO2) doping (Fe2O3) thin films have been prepared by spray pyrolysis technique (SPT) on a glass substrate. We have studied the effects of various doping percentage of (TiO2) on (Fe2O3) optical and electrical properties. The optical parameters of the prepared films as absorbance, absorption coefficient, optical energy gap and refractive index have been calculated for all prepared films. D.C conductivity and Hall effect for all films are measured. The results showed that absorbance of prepared films decreases with increasing percentage of (TiO2) this lead to increase the energy gap and conductivity decreased with increasing of percentage of (TiO2) as well as the results showed throughout the study that all films have tow activation energy, its value increase with increasing of percentage of (TiO2). Hall effect measurement showed all films have n-type conductivity.
Synthesis of Cobalt ferrite by Solid Reaction Methodsank_sanjay
Cobalt ferrite nano-crystalline powder was synthesized from the powder mixture of cobalt carbonate and iron oxide by mixed oxide ceramic method. The effects of temperature of calcination as well as molar ratio of CoCO3/Fe2O3 on the phase structure, morphology and magnetic properties of the products were studied using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and vibrating sample magnetometer (VSM) techniques, respectively. The samples calcined at 800 and 900˚C consisted of cobalt ferrite, iron oxide and cobalt oxide. In the sample calcined at 1000˚C, the reaction was completed and single phase CoFe2O4 with a mean crystallite and particle sizes of 49 and 300 nm, respectively was obtained.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Preparation, Structure, and Characterization of Nd2mo2o9 fast Oxide Ion Condu...IJARIIT
The structure and ion conductivity of Nd2Mo2O9powders were synthesized by using Nd(NO2)3, MoO3, and aspartic acid (fuel) in assisted combustion method with heating at 550˚C for 6 hours. The thermal decomposition, phase identification, morphology, ionic conductivity of the samples were studied by TGA/DTA, XRD and SEM four probe D.C. method respectively. The formation of Nd2Mo2O9 was confirmed by FTIR studies. The synthesis and crystallization were followed by thermochemical techniques (TGA/DTA) studies. The synthesized materials showed reasonable ionic conductivity. These results indicate that assisted combustion method is a promising method to prepare nanocrystalline Nd2Mo2O9 for solid oxide fuel cell.
Optical and Electrical Properties of TiO2 Doped Fe2O3 Thin Film Prepared by S...IJAEMSJORNAL
In this work, iron oxide (Fe2O3) and titanium oxide (TiO2) doping (Fe2O3) thin films have been prepared by spray pyrolysis technique (SPT) on a glass substrate. We have studied the effects of various doping percentage of (TiO2) on (Fe2O3) optical and electrical properties. The optical parameters of the prepared films as absorbance, absorption coefficient, optical energy gap and refractive index have been calculated for all prepared films. D.C conductivity and Hall effect for all films are measured. The results showed that absorbance of prepared films decreases with increasing percentage of (TiO2) this lead to increase the energy gap and conductivity decreased with increasing of percentage of (TiO2) as well as the results showed throughout the study that all films have tow activation energy, its value increase with increasing of percentage of (TiO2). Hall effect measurement showed all films have n-type conductivity.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Photo-induced reduction of CO2 using a magnetically separable Ru-CoPc@TiO2@Si...Pawan Kumar
An efficient photo-induced reduction of CO2 using magnetically separable Ru-CoPc@TiO2@SiO2@Fe3O4
as a heterogeneous catalyst in which CoPc and Ru(bpy)2phene complexes were attached to a solid
support via covalent attachment under visible light is described. The as-synthesized catalyst was characterized
by a series of techniques including FTIR, UV-Vis, XRD, SEM, TEM, etc. and subsequently tested for
the photocatalytic reduction of carbon dioxide using triethylamine as a sacrificial donor and water as a
reaction medium. The developed photocatalyst exhibited a significantly higher catalytic activity to give a
methanol yield of 2570.78 μmol per g cat after 48 h.
Structural and photoluminescence study of SrAl2O4:Eu3+ phosphors synthesized ...AI Publications
The combustion synthesis method was employed for the synthesis of red-emitting monoclinic SrAl2O4:Eu3+ phosphors. Structural characterization of annealed samples was carried out via X-ray Diffraction (XRD). XRD patterns reveal that strontium aluminate samples were cubic spinel nanoparticles and the grain size determined by the Debye-Scherrer formula is 35.34 nm. The vibrational stretching frequencies corresponding to the composites were confirmed by FT-IR spectroscopy. The PL spectra show the strongest emission at 612 nm corresponds to the 5D0 → 7F2 transition of Eu3+, which results in bright red color emitting phosphor used for display devices and lamp industries.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Removal of lead ions by nife2 o4 nanoparticleseSAT Journals
Abstract Nickel ferrite nanoparticles have been prepared by polymeric precursor method. The nanoparticles application in the removal of lead ion was investigated. The results showed that the adsorptive properties were dependent on pH, duration and temperature. Highest percentage (99%) lead adsorption was observed under basic condition at room temperature during 1 h stirring. Analysis of lead adsorbed nickel ferrite by powder XRD, FTIR and XPS techniques revealed the adsorption took place based on hydroxide mechanism. The lead salt formed on the surface of the ferrite powder was identified to be lead carbonate and lead hydroxy carbonate at pH 7 and 9 respectively. Keywords: Nickel ferrite; Nanoparticles; Lead; Adsorption; Hydroxide
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Morphology and characterization of srxcu1 xo [x=0.1]eSAT Journals
Abstract The application of Nanostructured materials is enormous as their physical and chemical properties depend upon size. Here an attempt is made first time to synthesis (Srx Cu1-xO) nanoparticles by sol–gel method. Sr(No3)2and Cu(No3)2.3H2O were taken as starting material. Ethanol, distilled water and PVA are mixed with these powders of nitrates and solution was stirred by magnetic stirrer at a temperature of 80 0C till a gel was formed. It was then dried at low temperature and finally calcinated at 400 0C for four hours. XRD of the sample shows its crystalline nature and particle size was determined to be 34nm by Debye Schherrer formula. The FTIR study shows two broad peak at 1455 cm-1and 532 cm-1. The UV-VIS analysis shows a absorption peak at 202nm .The TEM images clearly shows the individual nanoparticles having diameter less than 20 nm. In one image a nano rod is also visible whose further study is also required. Keywords:-nano materials, XRD, FTIR, TEM, UV-VIS, band gap, strontium
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Synthesis and Structural Characterization of Cu Substituted Ni-Zn Nano-Ferrit...IJERA Editor
The ferrite nano particles having chemical formula Ni0.2CuxZn0.8-xFe2O4 (where x=0.0 to 0.8 with step of 0.2) were synthesized by Citrate-Gel Auto Combustion method at low temperature. The synthesized powders were sintered at 500oC for 4 hours in air and characterised by XRD, SEM with EDS. XRD analysis of prepared samples were confirmed the single phase cubic spinel Structure. The crystallite size (D) of prepared ferrites were in the range of 24-73nm. The values of lattice parameter (a) decreased and X-ray density (dx) were increased with the increasing of Cu substitution. The surface morphology of the prepared samples was investigated by Scanning Electron Microscope(SEM). An elemental composition of the samples was studied by Energy Dispersive Spectroscopy(EDS). The observed results can be explained on the basis of composition and crystal size.
Growth, Structure and Physical Properties of Tetraaqua Bismaleatocobalt (II) ...IOSR Journals
Tetraaqua bismaleatocobalt(II) crystals are grown by the controlled ionic diffusion in hydrosilica gel. The functional groups present in the crystal are identified using FTIR spectrum. The compound crystallizes in the triclinic system with space group P-1. The thermogravimetric studies revealed a three stage decomposition scheme. The polarization mechanism of the compound is explored using the dielectric measurements. The optical band gap of the material is found to be 2.4 eV from diffuse reflectance spectroscopy (DRS). The narrow magnetic hysteresis loop and structural considerations indicate the weak ferromagnetic behaviour of the material.
Synthesis & Bio-Evaluation of 4-Amino-5-Benzyl-2, 4-Dihydro-3H-1, 2, 4-Triazo...IJERA Editor
Synthesis of 4-amino-5-benzyl-2,4-dihydro-3H-1,2,4-triazole-3-thione Capped Silver NanoParticles by a simple procedure. Spherical shaped Capped Ag-NPs with average size of 14.65 nm are obtained by the treatment of aqueous silver ions with hot ethanolic solution of 4-amino-5-benzyl-2,4-dihydro-3H-1,2,4-triazole-3-thione as Stabilizing/Reducing agent. The Nanoparticles are characterized using TEM, XRD and FTIR studies. The synthesized Nanoparticles were tested for in vitro antimicrobial activity at concentrations of 50, 100, 200 μg /ml. The Nanoparticles showed good activity, nearly equal to the inhibition zone value of ciprofloxacin, against the E.coli bacteria. For the antifungal activity, the compound showed equipotent activity against A.niger.
Effect of calcination on the electrical properties and quantum confinement of...eSAT Journals
Abstract Fe2O3 nanoparticles have been prepared by a simple solvothermal method using a domestic microwave oven. X-ray powder diffraction measurement indicates the amorphous nature of the as-prepared sample. Calcined samples were obtained by annealing the as-prepared sample at different temperatures, viz. 400, 500, 600 and 700oC. Transmission electron microscopic images indicate that all the five samples are spherical in shape. AC electrical measurements were carried out on pelletized samples by the parallel plate capacitor method at various temperatures ranging from 40-130oC and frequencies ranging from 100 Hz -1 MHz. Results indicate low AC electrical conductivities and consequently show the occurrence of nano confined states. The exciton Bohr radii obtained from the dielectric constant values at 40oC temperature and 1 kHz frequency are 41.8, 54.8, 55.3, 56.3 and 27.0 respectively for the as-prepared sample and samples calcined at 400, 500, 600 and 700oC which indicate a strong quantum confinement effect. The impedance spectra observed exhibit non-ideal behavior. Keywords: Semiconductors, Magnetic materials, Nanoparticles, Electrical properties
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Photo-induced reduction of CO2 using a magnetically separable Ru-CoPc@TiO2@Si...Pawan Kumar
An efficient photo-induced reduction of CO2 using magnetically separable Ru-CoPc@TiO2@SiO2@Fe3O4
as a heterogeneous catalyst in which CoPc and Ru(bpy)2phene complexes were attached to a solid
support via covalent attachment under visible light is described. The as-synthesized catalyst was characterized
by a series of techniques including FTIR, UV-Vis, XRD, SEM, TEM, etc. and subsequently tested for
the photocatalytic reduction of carbon dioxide using triethylamine as a sacrificial donor and water as a
reaction medium. The developed photocatalyst exhibited a significantly higher catalytic activity to give a
methanol yield of 2570.78 μmol per g cat after 48 h.
Structural and photoluminescence study of SrAl2O4:Eu3+ phosphors synthesized ...AI Publications
The combustion synthesis method was employed for the synthesis of red-emitting monoclinic SrAl2O4:Eu3+ phosphors. Structural characterization of annealed samples was carried out via X-ray Diffraction (XRD). XRD patterns reveal that strontium aluminate samples were cubic spinel nanoparticles and the grain size determined by the Debye-Scherrer formula is 35.34 nm. The vibrational stretching frequencies corresponding to the composites were confirmed by FT-IR spectroscopy. The PL spectra show the strongest emission at 612 nm corresponds to the 5D0 → 7F2 transition of Eu3+, which results in bright red color emitting phosphor used for display devices and lamp industries.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Removal of lead ions by nife2 o4 nanoparticleseSAT Journals
Abstract Nickel ferrite nanoparticles have been prepared by polymeric precursor method. The nanoparticles application in the removal of lead ion was investigated. The results showed that the adsorptive properties were dependent on pH, duration and temperature. Highest percentage (99%) lead adsorption was observed under basic condition at room temperature during 1 h stirring. Analysis of lead adsorbed nickel ferrite by powder XRD, FTIR and XPS techniques revealed the adsorption took place based on hydroxide mechanism. The lead salt formed on the surface of the ferrite powder was identified to be lead carbonate and lead hydroxy carbonate at pH 7 and 9 respectively. Keywords: Nickel ferrite; Nanoparticles; Lead; Adsorption; Hydroxide
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Morphology and characterization of srxcu1 xo [x=0.1]eSAT Journals
Abstract The application of Nanostructured materials is enormous as their physical and chemical properties depend upon size. Here an attempt is made first time to synthesis (Srx Cu1-xO) nanoparticles by sol–gel method. Sr(No3)2and Cu(No3)2.3H2O were taken as starting material. Ethanol, distilled water and PVA are mixed with these powders of nitrates and solution was stirred by magnetic stirrer at a temperature of 80 0C till a gel was formed. It was then dried at low temperature and finally calcinated at 400 0C for four hours. XRD of the sample shows its crystalline nature and particle size was determined to be 34nm by Debye Schherrer formula. The FTIR study shows two broad peak at 1455 cm-1and 532 cm-1. The UV-VIS analysis shows a absorption peak at 202nm .The TEM images clearly shows the individual nanoparticles having diameter less than 20 nm. In one image a nano rod is also visible whose further study is also required. Keywords:-nano materials, XRD, FTIR, TEM, UV-VIS, band gap, strontium
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Synthesis and Structural Characterization of Cu Substituted Ni-Zn Nano-Ferrit...IJERA Editor
The ferrite nano particles having chemical formula Ni0.2CuxZn0.8-xFe2O4 (where x=0.0 to 0.8 with step of 0.2) were synthesized by Citrate-Gel Auto Combustion method at low temperature. The synthesized powders were sintered at 500oC for 4 hours in air and characterised by XRD, SEM with EDS. XRD analysis of prepared samples were confirmed the single phase cubic spinel Structure. The crystallite size (D) of prepared ferrites were in the range of 24-73nm. The values of lattice parameter (a) decreased and X-ray density (dx) were increased with the increasing of Cu substitution. The surface morphology of the prepared samples was investigated by Scanning Electron Microscope(SEM). An elemental composition of the samples was studied by Energy Dispersive Spectroscopy(EDS). The observed results can be explained on the basis of composition and crystal size.
Growth, Structure and Physical Properties of Tetraaqua Bismaleatocobalt (II) ...IOSR Journals
Tetraaqua bismaleatocobalt(II) crystals are grown by the controlled ionic diffusion in hydrosilica gel. The functional groups present in the crystal are identified using FTIR spectrum. The compound crystallizes in the triclinic system with space group P-1. The thermogravimetric studies revealed a three stage decomposition scheme. The polarization mechanism of the compound is explored using the dielectric measurements. The optical band gap of the material is found to be 2.4 eV from diffuse reflectance spectroscopy (DRS). The narrow magnetic hysteresis loop and structural considerations indicate the weak ferromagnetic behaviour of the material.
Synthesis & Bio-Evaluation of 4-Amino-5-Benzyl-2, 4-Dihydro-3H-1, 2, 4-Triazo...IJERA Editor
Synthesis of 4-amino-5-benzyl-2,4-dihydro-3H-1,2,4-triazole-3-thione Capped Silver NanoParticles by a simple procedure. Spherical shaped Capped Ag-NPs with average size of 14.65 nm are obtained by the treatment of aqueous silver ions with hot ethanolic solution of 4-amino-5-benzyl-2,4-dihydro-3H-1,2,4-triazole-3-thione as Stabilizing/Reducing agent. The Nanoparticles are characterized using TEM, XRD and FTIR studies. The synthesized Nanoparticles were tested for in vitro antimicrobial activity at concentrations of 50, 100, 200 μg /ml. The Nanoparticles showed good activity, nearly equal to the inhibition zone value of ciprofloxacin, against the E.coli bacteria. For the antifungal activity, the compound showed equipotent activity against A.niger.
Effect of calcination on the electrical properties and quantum confinement of...eSAT Journals
Abstract Fe2O3 nanoparticles have been prepared by a simple solvothermal method using a domestic microwave oven. X-ray powder diffraction measurement indicates the amorphous nature of the as-prepared sample. Calcined samples were obtained by annealing the as-prepared sample at different temperatures, viz. 400, 500, 600 and 700oC. Transmission electron microscopic images indicate that all the five samples are spherical in shape. AC electrical measurements were carried out on pelletized samples by the parallel plate capacitor method at various temperatures ranging from 40-130oC and frequencies ranging from 100 Hz -1 MHz. Results indicate low AC electrical conductivities and consequently show the occurrence of nano confined states. The exciton Bohr radii obtained from the dielectric constant values at 40oC temperature and 1 kHz frequency are 41.8, 54.8, 55.3, 56.3 and 27.0 respectively for the as-prepared sample and samples calcined at 400, 500, 600 and 700oC which indicate a strong quantum confinement effect. The impedance spectra observed exhibit non-ideal behavior. Keywords: Semiconductors, Magnetic materials, Nanoparticles, Electrical properties
Improved SCTP Scheme To Overcome Congestion Losses Over ManetIJERA Editor
Transmission control conventions have been utilized for data transmission process. TCP has been pre-possessed
for information transmission over wired correspondence having diverse transfer speeds and message delays over
the system. TCP gives correspondence utilizing 3-handshake which sends RTS and ACK originate from server
end and information message has been transmitted over the data transmission gave. This does not give security
over flooding assault happened on the system. TCP gives correspondence between distinctive hubs of the wired
correspondence however when multi-spilling happens in a system TCP does not gives legitimate throughput of
the framework which is significant issue that happened in the past framework. In the proposed work, to beat this
issue SCTP and Improved SCTP transmission control convention has been executed for the framework
execution of the framework. SCTP gives 4-handshake correspondence in the message transmit and improved
SCTP gives the performance when the queue length comes to its full value then it divides the message to other
nodes because of which security element get expansions and this likewise gives correspondence administrations
over multi-spilling and multi-homing. Numerous sender and recipients can impart over wired system utilizing
different methodologies of correspondence through same routers, which debases in the TCP convention. In last
we assess parameters for execution assessment. Here, we composed and actualized our proving ground utilizing
Network Simulator (NS-2.35) to test the execution of both Routing conventions.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Optical and surface properties of al doped ga2 o3 by elemental stack methodeSAT Journals
Abstract Al doped Ga2O3 thin film was prepared by stacking of Al thin film on Ga2O3 thin film using thermal evaporator. The doping process was carried out by post annealing process at three different temperatures. The absorbance spectra revealed the Al doping process and showed low absorbance at high annealing temperature. Scanning Electron Microscope images were the evidence of surface effect due to Al diffuses at high annealing temperature (> 400°C). Energy Dispersive Spectra showed the changes in the elemental composition of Al doped Ga2O3 thin film for various annealing temperature and revealed Al diffusion by observed low Al content at the surface of the doped Ga2O3 thin film. Keywords: Ga2O3, Al doping, Optical properties, Surface analysis
A facile method to prepare CdO-Mn3O4 nanocompositeIOSR Journals
CdO-Mn3O4 nanocomposite has been prepared by a simple solvothermal method using a domestic microwave oven. Cadmium acetate, manganese acetate and urea were used as the precursors and ethylene glycol as the solvent. The as-prepared sample was annealed for 1 hour in each case at different temperatures, viz. 100, 200 and 300°C. The as-prepared and annealed samples were characterized by X-ray diffraction and scanning electron microscopic analyses. Results indicate that annealing at 300°C is required to get the sample with high phase purity and homogeneity. The present study indicates that the method adopted can be considered as an economical and scalable one to prepare the proposed nanocomposite with reduced size, phase purity and homogeneity.
Spectroscopic studies on Mn2+ ions doped Cadmium Aluminum Fluoro Lead Borate ...IJERA Editor
This article reports on optical properties of Mn2+ (0.5 mol%): 49.5 B2O3 - 10PbO - 30CdO -10AlF3 glasses.
Optical absorption spectrum of the manganese ions doped glass exhibits broad absorption band at 473 nm.
Photoluminescence spectrum of Mn2+ (0.5 mol %): 49.5B2O3- 30CdO – 10PbO - 10AlF3 glass has revealed a red
emission at 618 nm with an excitation wavelength 467 nm.
Mixed Ligand, Palladium(II) and Platinum(II) Complexes of Tertiary Diphosphin...Karwan Omer
Palladium(II) and platinum(II) complexes containing the mixed ligands tertiary
diphosphinesdppm. dppp and dppf with Thioester ligand S-1H benzo[d] imidazole-2-yl benzothioate
(HSBIBT) have been prepared by the reaction of PdCl2 and PtCl2 with one equiv of tertiary
diphosphines ligands to form [Pd(k2-dppf)Cl2], [Pd(k2-dppp)Cl2] and [Pt(k2-dppmCl)Cl2] complexes
and then add the ligand HSBIBT to these complexes to form mixed ligand complexes. The prepared
complexes have been characterized by single-crystal X-ray diffraction, elemental analysis, magnetic
susceptibility, molar conductance, IR spectral data and UV-Visible. The results suggested that the
ligand HSBIBT bonded to the metal through N atom and square planner geometries were assigned
for the complexes.
Studying the Structure and the Optical Properties of Pd Nanoparticles Affecte...IJERA Editor
In this paper, Palladium (Pd) nanoparticales (NPs) at different concentrations (150 and 500) capped with poly
(vinylpyrrolidone) (PVP) were Synthesized by a polyol reduction method in an ethylene glycol solution at
temperature of 45C˚. The structural and optical properties of Pd NPs has been investigated, all thin films were
tested using X-ray diffraction (XRD), all XRD peaks can be indexed as face centered cubic (FCC)
Structure, with strong crystalline orientation at (111) plane. The morphology properties of the prepared films
were study by Atomic Force Microscopy (AFM) the results indicated that all films have nanoscale grain size
around 80 nm and Scan Electron Microscopy (SEM) images show spherical nanoscale particles with clusters
shape. The size of the particles decreased with increasing of concentrations.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Structural, Optical and Electrical Studies on Spray Deposited Mercury Doped C...ijrap
Thin films of cadmium sulphide have been prepared using home built spray pyrolysis unit on glass substrate at 400 C. Aqueous solutions of cadmium chloride and thiourea were used for the cadmium
sulphide (CdS) films and different proportions by weight/volume of mercury II chloride was used for doping Hg onto cadmium sulphide (Cd1-xHgxS) films. The films obtained are having continuous, smooth surface with good transmittance. The thickness of all films is of the order of 320 nm. Determination of the crystalline nature has been done using XRD pattern. The effect of Hg on the surface morphology of CdS film has been studied by Scanning Electron Microscopy. The optical band gap has been calculated using the data from transmission spectra. Resistance before and after doping with Hg is also presented in the paper.
STRUCTURAL, OPTICAL AND ELECTRICAL STUDIES ON SPRAY DEPOSITED MERCURY DOPED C...ijrap
Thin films of cadmium sulphide have been prepared using home built spray pyrolysis unit on glass
substrate at 400 C. Aqueous solutions of cadmium chloride and thiourea were used for the cadmium
sulphide (CdS) films and different proportions by weight/volume of mercury II chloride was used for
doping Hg onto cadmium sulphide (Cd1-xHgxS) films. The films obtained are having continuous, smooth
surface with good transmittance. The thickness of all films is of the order of 320 nm. Determination of the
crystalline nature has been done using XRD pattern. The effect of Hg on the surface morphology of CdS
film has been studied by Scanning Electron Microscopy. The optical band gap has been calculated using
the data from transmission spectra. Resistance before and after doping with Hg is also presented in the
paper.
Spectral studies of praseodymium doped heavy metal borate glass systemsinventy
Praseodymium doped HMO glasses are fabricated with the following compositions using conventional melt quenching technique. The compositions of the glass systems are 12 ZnO + 33 B2O3 + (50-x) PbO + (x+10) CaO + 4 Al2O3 + 1 Pr6O11 where (x = 0,10,20,30 and 40 mol %.). Certain physical properties of these systems have been evaluated and reported. Spectral data for all these systems were recorded for X-ray diffraction, Optical absorption and Fluorescence properties. The Judd-Ofelt intensity parameters Ωλ ( λ = 2,4,6) were evaluated from the spectral data and in turn employed to evaluate the lasing parameters of Pr3+ HMO glass systems such as radiative transition probabilities (A), radiative life-times (τR), branching ratios (βR) absorption cross-sections (σa) and Stimulated emission cross-sections (σe). The experimental and calculated branching ratios (βR) for the lasing transitions 3P0 3H4, 3P0 3H6, and 3P0 3F2 are found to be in good agreement in the present work.
Growth and Characterization of Morpholium Cadmium Acetoperchlorate Single Cry...IJERA Editor
In the search for novel crystal with promising nonlinear optical properties an attempt is made to grow
morpholium cadmium aceto-perchlorate single crystals. The title compound is synthesized by slow evaporation
technique at room temperature. The powder X-ray diffraction pattern has been recorded and the various planes
of reflections are identified. The transmittance spectrum of the crystal in the UV–Vis region has been obtained.
Using the FTIR spectrum, the vibrational modes of the crystal is analysed and the presence of cadmium in the
crystal is confirmed. Thermogravimetric analysis and differential thermal analysis studies have been done to
assess the thermal stability of the grown crystal. The dielectric measurement for the crystal is carried out in the
range of 50 Hz to 5 MHz for three different temperatures 40ºC, 80ºC and 120ºC to study the electrical nature of
the grown crystal. The nonlinear optical property of the grown crystal is confirmed
This article reports on the optical analysis of Cu2+ (0.5 mol %): 59.5B2O3 – 20 TeO2 – 10CdO – 10Li2O glass.
From XRD spectrum , amorphous nature of the glass has been studied. Absorption spectrum of the copper glass
shows a broad absorption band (2B1g→2B1g) at 829 nm has been observed. Emission spectrum of Cu2+ (0.5 mol
%): 59.5B2O3 – 20 TeO2 – 10CdO – 10Li2O glass has exhibits a blue emission at 439 nm with an excitation
wavelength 379 nm.
Characterization and DC Conductivity of Novel CuO doped Polyvinyl Alcohol (PV...IJERA Editor
DC conductivity of PVA-CuO nano-composite films have been studied in the present work. The composites were prepared by solution-casting technique. The prepared PVA-CuO composites have been characterized by X-ray diffraction (XRD) analysis, Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDXS); which confirmed the presence of CuO in polyvinyl alcohol and the formation of the composite. DC conductivity studies show thermally activated behavior of all the composites. The conductivity was found to increase with the increase in temperature indicating the semiconducting behavior of all the compositions. The activation energy increases as the content of CuO nanoparticles increases from 1 to 4 in wt% in the PVA- CuO nano-composites. Maximum conductivity was observed in 4 wt% of CuO in polyvinyl alcohol.
Greener cum chemical synthesis and characterization of Mg doped ZnS nanoparti...IJERA Editor
In the present investigations, high-quality Mg doped ZnS nanoparticles were synthesized by Greener cum
chemical process with the assistance of polyvinyl pyrrolidone (PVP) with two different Mg concentrations.
Doping of Mg metal in nanoparticles were found to be a good technique for tuning the band gap of ZnS
nanoparticles. Simultaneously, Mg doping also inhibited the growth of particle size and it decreased from 33.2
nm to 18.3 nm with the increase in doping concentration from 0% to 5%. Band gap was found to rise from 3.12
eV to 3.38 eV and photoluminescence studies exposed that visible Photoluminescence (PL) emission was
improved with doping concentration. The nanoparticles have been characterized by Field Emission Scanning
Electron Microscopy (FESEM), X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy,
Ultra Violet visible (UV–vis) spectroscopy, and Energy Dispersive X-ray Analysis (EDAX).
1. Advance Physics Letter
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ISSN (Print) : 2349-1094, ISSN (Online) : 2349-1108, Vol_1, Issue_1, 2014
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Structural Characterization of Combustion Synthesized Gd2O3
Nanopowder by Using Glycerin as Fuel
1
Raunak Kumar Tamrakara
, 2
D. P. Bisen, 3
Ishwar Prasad Sahu
1
Department of Applied Physics, Bhilai Institute of Technology (Seth Balkrishan Memorial), Near Bhilai House, Durg
(C.G.) Pin-491001, India
2,3
School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur (C.G.) Pin-492010, India
Abstract -Combustion synthesis were accomplished to
synthesize pure Gd2O3 phosphor by using glycerin as fuel.
To investigate the luminescence behavior, excitation and
emission spectra have been recorded. The prepared
phosphor sample was characterized by using XRD, FTIR,
SEM and TEM. From the XRD data, using the Scherer’s
formula the calculated average crystallite size of pure Gd2O3
phosphor is around 8nm. The TEM (Transmission Electron
Microscope) and SEM (Scanning Electron Microscope)
results agree with the XRD results.
Keywords: Pure Gd2O3, Phosphors; XRD, FTIR, SEM &
TEM; Corresponding author Email Id: -
raunak.ruby@gmail.com.
I. INTRODUCTIONS:-
Nowadays, Rare earth oxide luminescent materials have
attracted great attention due to their size, shape and
phase dependent luminescence properties, which make
them suitable for fundamental and technological
applications [1-4]. Among different families of
crystalline materials, oxide crystals are of great interest
due to their unique optical properties, such as long
fluorescent lifetime, large Stokes shift, favourable
physical and chemical properties as well as good
photochemical stability. Several of the rare earth
elements and their corresponding oxides are of
exceedingly technical importance and are used in critical
parts. Rare earth oxides are this kind of advanced
materials and which are widely used as high
performance luminescent devices, magnets, catalysts,
and other functional materials such as electronic,
magnetic, nuclear, optical, and catalytic devices [2, 5-6].
Gadolinium oxide (Gd2O3) is a good choice to
investigate for luminescence properties due to its high
refractive index (2.3), high optical transparency, good
thermal and chemical stability, high dielectric constant,
and low phonon energy among the family of oxide hosts
[7-10]. Because of these favourable properties, it
exhibits numerous applications such as three way
catalysts for exhaust gas treatment from vehicles, oxide
ion conductors in solid oxide fuel cells, oxygen gas
sensors, electrode materials for sensors, optoelectronic
devices, high definition televisions, biological imaging,
high temperature superconducting materials, excellent
ultraviolet light absorber, photo-catalyst, therapeutic
effects in cancer treatment-enhancing the effect of
radiation on cancerous cells while reducing damage to
normal cells, luminescent inks, paints and dyes
sunscreen cosmetics and luminescent materials[11-17].
In the presented work, combustion synthesis technique
has been utilized to prepare nanopowders of gadolinium
oxide by using glycerin as a fuel. The synthesis and
characterization of Gadolinium oxide via different
techniques have attracted considerable attention. The
glycerin and metal nitrate get decomposed and give
flammable gases such as NH3, CO2, and NO. When the
solution reaches a point of spontaneous combustion, it
begins burning and becomes a burning solid. The
combustion continues until all the flammable substances
have burned out and it turns out to be a loose substance
with voids and pores formed by the escaping gases
during the combustion reaction. The whole process takes
only a few minutes to yield powder of oxide. The
structural and optical characterizations of the
synthesized powders were carried out using X-ray
powder diffractometer. Scanning electron microscopy
(SEM) was used to illustrate the formation of crystallites
and TEM was used for particle size confirmation.
Fourier Transform Infrared Spectroscopy (FTIR)
spectrum of Gd2O3 nanopowder was obtained by using
FTIR spectrophotometer (Model; MIR 8300TM) with
KBr mixture in the pellet form.
Synthesis:- For synthesis of Gd2O3 phosphor an
aqueous precursor solution containing 1 gm/ml
Gd(NO3)3.6H2O and 2.5 gm/ml urea was used. When the
solution was stirred for 1 h it was transformed into a
transparent gel. This semisolid sample was heated at 600
± 10°C in a muffle furnace. After few minutes
spontaneous ignition occurred. Conversion of the sample
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to the anhydrous form was followed by a vigorous redox
reaction which produced Gd2O3 phosphor with liberation
of gaseous byproducts by libration of oxides of carbon
and nitrogen. The heat of this redox reaction is sufficient
for decomposition of the mixture. The resulting mixture
was heated until a controlled explosion took place
yielding a very fine powder [14]. There would be
different mechanism of combustion reaction with
different fuel-oxidizer combinations. When a mixture
containing oxidizer and fuel with required stoichiometry
is heated rapidly at or above the temperature of
exothermic decomposition of fuel, it undergoes melting
and dehydration initially. Later on this mixture foams
due to the generation of gaseous decomposition products
as intermediates and leads to enormous swelling.
The crystallinity as well as the particle size of the
phosphor were monitored X-ray diffraction
measurement. The X-ray powder diffraction data was
collected by using Bruker D8 Advanced X-ray
diffractometer using Cu Kα radiation. The X-rays were
produced using a sealed tube and the wave length of X-
ray was 0.154 nm. The X-rays were detected using a fast
counting detector based on Silicon strip technology
(Bruker Lynx Eye detector). Molecular structure was
determined by FTIR analysis done by Nicolet
Instruments Corporation USA MAGNA-550. The
surface morphology of the prepared phosphor was
determined by field emission scanning electron
microscopy (FESEM) JSM-7600F. Energy dispersive X-
ray analysis (EDX) was used for elemental analysis of
the phosphor. Particle diameter and surface morphology
of prepared phosphor were determined by Transmission
Electron Microscopy (TEM) using Philips CM-200.
II. RESULTS & DISCUSSIONS:-
(I) XRD Results:- The powder X-ray diffraction
(PXRD) was used to investigate the phase structures of
the resulting powder. No crystalline impurity apart from
rare earth oxides can be determined from the PXRD
analysis. The crystallite size was calculated by the X-ray
line broadening method using the Scherrer formula [18]:
D =
kλ
βCosθ
where λ is the wave length of radiation used (Cu Kα in
this case), k is the constant, β is the full width at half
maximum (FWHM) intensity of the diffraction peak for
which the particle size is to be calculated, θ is the
diffraction angle of the concerned diffraction peak and
D is the crystallite dimension (or particle size). It can be
seen that the diffraction pattern of the phosphor is
consistent with the JCPDS data (43-1015), indicating
that the sample of Gd2O3 phosphor is in the pure
monoclinic phase [19]. The broadening of the diffraction
peaks is due to the small crystallite size of the formed
nanoparticles, which are less than 10 nm.
25 30 35 40 45 50
1x10
3
2x10
3
3x10
3
4x10
3
5x10
3
6x10
3
Intensity(Arb.Units)
2
Figure 1. Powder X-Ray Diffraction pattern of Gd2O3
phosphor
(II) FITR Results:- FTIR spectra have been recorded
for combustion synthesized Gd2O3 powders by using
glycerin as a fuel as shown in Fig. 2. The broad peak
cantered around 3400 cm-1
to 3500 cm-1
corresponds to
the O-H symmetric stretching from hydroxyl group
[4,20]. FTIR spectra revealed that the peak at 1534 to
1456 cm-1
is may be due to surface-adsorbed NO3
-
group, stretching vibration of NO [21]. The weak peak
at 1600 cm-1
are correspond to the stretching mode of
C=O in a carbonyl functional group for the prepared
material [22]. The similar results have also been
observed elsewhere [23]. Hydroxyl groups provide an
effective pathway for the radiation less energy transfer
of OH vibration and quench the emission intensity. The
band at approximately 542 cm-1
is ascribed to the Gd–O
vibration of Gd2O3 phosphor [4,14,17, 24].
Figure 2. FTIR spectra of Gd2O3 phosphor
(III) Scanning Electron Microscope (SEM) results:-
The morphology analysis of Gd2O3 powders have been
studied by SEM using backscattered electron detection
mode. The black and white SEM micrograph of the
prepared powder indicates that all the particles are
looking like agglomerated in homogeneousely in
different shapes/sizes of the order of nano range
50010001500200030004000
1/cm
25
50
75
100
125
150
%T
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Figure 3. Scanning Electron Microscope image of
Gd2O3 phosphor
Energy Dispersive X-ray analysis (EDX)
The EDX spectra represent elemental analysis of the
prepared sample (Fig4). In the spectrum intense peak of
Gd, and O are present which confirms the formation of
Gd2O3 phosphor (fig 4). For EDX analysis, entire area of
the black and white SEM micrographs was analyzed
with EDX mapping and spectrum. The EDX mapping
measurements were carried Gd2O3 powders to analyze
the composition of the clustered particles.
Figure 4. Energy dispersive X-ray analysis of Gd2O3
phosphor
Transmission electron microscopy (TEM) Results: -
Transmission electron microscopy was used to study the
morphology of combustion synthesized Gd2O3 phosphor
using glycerine as fuel (Figure 5). TEM analysis shows
the nanocrystalline behavior of the prepared phosphor
with particle size in the range of 8nm to 12nm which is
identical with XRD result.
Figure 5. Transmission electron microscope image of
Gd2O3 phosphor
III. CONCLUSION: -
From above studies it is concluded that, this method is
suitable for large scale production and eco-friendly. The
sample was characterized by XRD, FTIR, SEM, and
TEM studies. From XRD pattern it is confirmed that
prepared phosphor has monoclinic structure and particle
size was determined by Debye- Scherer formula, which
was found 8 to 12 nm range. The functional group
analysis was determined by FTIR analysis which
confirms the formation of Gd2O3 nano phosphors. Also
confirmation found by the SEM and TEM micrographs
which is good agreement with XRD pattern.
IV. ACKNOWLEDGEMENTS:-
We are very grateful to IUC Indore for XRD
characterization and also thankful to Dr. Mukul Gupta
for his cooperation. I am very thankful to SAIF, IIT,
Bombay for other characterization such as SEM, TEM,
FTIR and EDX. Very thankful to Dr. KVR Murthy M.S.
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University, Baroda (Chairman Luminescence Society of
India).
REFERENCE:-
[1] Vijay Singh, V. K. Rai, Vineet, M. Haase, J.
Appl. Phys. 112 (2012) 063105-063109.
[2] C. Joshi, A. Rai, Y. Dwivedi and S. B. Rai ,
Journal of Luminescence 132 (2012) 806–810.
[3] M. Wang, W. Hou, C.C. Mi, W. X. Wang, Z. R.
Xu, H.H. Teng, C.B. Mao, and S.K. Xu; Anal.
Chem., 2009, 81, 8783–8789.
[4] H. Guo, Y. Li, D. Wang, W. Zhang, M. Yin, L.
Lou, S. Xia, J. Alloy. Compd. 376(2004) pp. 23–
27.
[5] T. Ninjbadgar, G. Garnweitner, A. Börger, L.M.
Goldenberg, O.V. Sakhno, J. Stumpe, Adv.
Funct. Mater. 19 (2009) 1819-1825.
[6] L.D. Sun, J. Yao, C.H. Liu, C.S. Liao, C.H. Yan,
J. Lumin. 87–89.
[7] P.B. Xie, C.K. Duan, W.P. Zhang, et al., Eu.
Chin. J. Lumin. 19 (1998) 19.
[8] L.D. Sun, J. Yao, C.H. Liu, C.S. Liao, C.H. Yan,
J. Lumin. 87–89 (2000) 447.
[9] F. Wang, W.B. Tan, Y. Zhang, X. Fan, Y. Wang,
Nanotechnology 17(1), R1–R13 (2006)
[10] N. Dhananjaya, H. Nagabhushana, B.M.
Nagabhushana, B. Rudraswamy, C.
Shivakumara, R.P.S. Chakradhar, J. Alloys
Compd. 509(5), 2368–2374 (2011)
[11] T. Kim Anh, L. Quoc Minh, N. Vu, T. Thu
Huong, N. Thanh Huong, C. Barthou, W. Strek,
Journal of Luminescence, 102-103. (2003) 391-
394.
[12] E. Downing, L. Hesselink, J. Ralston, and R.
Macfarlane, “A Three-Color, Solid-State, Three
Dimensional. Display,” Science 273, 1185-89
(1996).
[13] M. L. Pang, J. Lin, J. Fu, R.B. Xing, C.X. Luo,
Y.C. Han, Opt. Mater. 23, 547–558 (2003).
[14] Raunak Kumar Tamrakar, D. P. Bisen and
Nameeta Brahme, Research on Chemical
Intermediates May 2014, Volume 40, Issue 5, pp
1771-1779.
[15] G.Z. Li, M. Yu, Z.L. Wang, J. Lin, R.S. Wang, J.
Fang, J. Nanosci. Nanotechnol. 6(5), 1416–1422,
(2006).
[16] Yanhong Li and Guangyan Hong, , Journal of
Luminescence 124 (2007) 297–301.
[17] Ytterbium Doped Gadolinium Oxide
(Gd2O3:Yb3+
) Phosphor: Topology, Morphology,
and Luminescence Behaviour in Hindawi
Publishing Corporation Indian Journal of
Materials Science Volume 2014, Article ID
396147, 7 pages, Accepted 4 February 2014.
[18] D. Grier, G. McCarthy, North Dakota State
University, Fargo, North Dakota, USA, ICDD
Grant-in- Aid (1991).
[19] P. Klug, L.E. Alexander, X-ray Diffraction
Procedure (Wiley, New York, 1954).
[20] Suresh Babu, A. Schulte, S. Seal, App. Phys. Lett
92 (2008) 123112-123114.
[21] B.M. Cheng, L. Yu, C.K. Duan, H. Wang, P.A.
Tanner, J Phy. Conden. Mater 20 (2008) 345231-
345234.
[23] Ho, J. C. Yu, T. Kwong, A. C. Mak, S. Lai,
Chem. Mater. 17 (2005) 4514-4522.
[24] K. Mishra, S.K. Singh, A.K. Singh, S.B. Rai,
Mater. Res. Bull. 47 (2012) 1339-1344.
[25] Ning Zhang, Ran Yi, Libin Zhou, Guanhua Gao,
Rongrong Shi, Guanzhou Qiu, Xiaohe Liu,
Lanthanide hydroxide nanorods and their
thermal decomposition to lanthanide, oxide
nanorods. Mater. Chem. Phys. 114, 160–167
(2009).