The document provides an overview of an independent study on synthesizing ZnO-TiO2 core-shell nanostructures using a hydrothermal method. The study was conducted by Hoàng Văn Tiến, a student at Ha Noi University of Science and Technology. The outline includes why the topic was chosen, background on ZnO-TiO2, the hydrothermal synthesis process, analysis methods used, results and discussions, and a summary. The student aims to develop new efficient photocatalysts for degrading organic pollutants using sunlight by growing ZnO nanorod arrays and depositing TiO2 shells via a hydrothermal coating process. Characterization techniques such as XRD and SEM will be used to analyze the
Synthesis and charecterization studies of nano ti o2 prepared via sol gel methodeSAT Publishing House
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
Synthesis and characterization of nano tio2 via different methodshena78
Titanium Dioxide nanoparticles are the ultra fine particles Particles of titanium dioxide (TiO2) have the diameters less than 100 nm. It is believed to be one of the three most produced nanomaterials , along with silicon dioxide nanoparticles and zinc oxide nanoparticles.
Synthesis and charecterization studies of nano ti o2 prepared via sol gel methodeSAT Publishing House
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
Synthesis and characterization of nano tio2 via different methodshena78
Titanium Dioxide nanoparticles are the ultra fine particles Particles of titanium dioxide (TiO2) have the diameters less than 100 nm. It is believed to be one of the three most produced nanomaterials , along with silicon dioxide nanoparticles and zinc oxide nanoparticles.
Synthesis, Characterization of ZnS nanoparticles by Coprecipitation method us...IOSR Journals
ZnS nanoparticles are prepared by coprecipitation method using various capping agents like PVP (polyvinylpyrrolidone), PVA (polyvinylalcohol) and PEG-4000 (polyethyleneglycol). These are characterized by UV-Visible spectra, X-ray diffraction (XRD) studies, Fourier Transform Infra-red spectra (FTIR) and Transmission electron microscopy (TEM). UV-Visible absorption spectra are used to find the optical band gap and the values obtained have been found to be in the range of 3.80-4.00eV. The particle size of nanoparticles calculated from XRD pattern has been in the range of 2-4 nm. It is also observed that the particle size of nanoparticle is affected by the nature of capping agent. Photo catalytic degradation of xylenol orange (XO) by the nanoparticles shows that these act as photo catalysts under sunlight irradiation. The XO dye was degraded more than 87.24, 83.42 and 73.05% in the presence of PEG-4000, PVA and PVP capped ZnS nanoparticles in 120, 150 and 180 min. respectively. The kinetics of catalyzed by synthesized ZnS nanoparticles with XO dye follows pseudo-first order kinetics with reasonable apparent rate constants.
With the increasing researches in the field of nanotechnology, various nanoparticles have become a source of interest among the nano technologists because of their great properties, like the optical properties of Cadmium Sulfide Nanoparticles are amazing and also easy to synthesize, but to make sure its quality it is equally essential to make out characterize it, this file will do the same in a lucid way!!
introduction to Tio2 nanostructures, properties of Tio2, current trends in biomedical application, general application of Tio2, synthesis of Tio2 nanoparticle by chemical route, characterization technique and objective.
Synthesis and characterization of ZnO nanoparticles via aqueous solution, sol...iosrjce
ZnO nanoparticles were synthesized by aqueous solution method, sol-gel method and hydrothermal
method.The synthesized particles were characterized by XRD ,SEM ,EDX and UV .The X-ray diffraction studies
reveals that the synthesized ZnO nanoparticles have wurtzite structure and the particle size varies from 13 to 18
nm. Scanning Electron Microscopic investigation reveals that the surface morphology of ZnO nanoparticle is
spherical in hydrothermal process and varies to flower like arrangement in aqueous solution and sol-gel
process. The UV-Visible spectrum of the nanoparticles shows a blue shift compared to that of the bulk sample.
Nanoparticles are particles between 1 and 100 nanometres in size with a surrounding interfacial layer. The interfacial layer is an integral part of nanoscale matter, fundamentally affecting all of its properties. The interfacial layer typically consists of ions, inorganic and organic molecules.
IOSR Journal of Applied Physics (IOSR-JAP) is an open access international journal that provides rapid publication (within a month) of articles in all areas of physics and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in applied physics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Synthesis, Characterization of ZnS nanoparticles by Coprecipitation method us...IOSR Journals
ZnS nanoparticles are prepared by coprecipitation method using various capping agents like PVP (polyvinylpyrrolidone), PVA (polyvinylalcohol) and PEG-4000 (polyethyleneglycol). These are characterized by UV-Visible spectra, X-ray diffraction (XRD) studies, Fourier Transform Infra-red spectra (FTIR) and Transmission electron microscopy (TEM). UV-Visible absorption spectra are used to find the optical band gap and the values obtained have been found to be in the range of 3.80-4.00eV. The particle size of nanoparticles calculated from XRD pattern has been in the range of 2-4 nm. It is also observed that the particle size of nanoparticle is affected by the nature of capping agent. Photo catalytic degradation of xylenol orange (XO) by the nanoparticles shows that these act as photo catalysts under sunlight irradiation. The XO dye was degraded more than 87.24, 83.42 and 73.05% in the presence of PEG-4000, PVA and PVP capped ZnS nanoparticles in 120, 150 and 180 min. respectively. The kinetics of catalyzed by synthesized ZnS nanoparticles with XO dye follows pseudo-first order kinetics with reasonable apparent rate constants.
With the increasing researches in the field of nanotechnology, various nanoparticles have become a source of interest among the nano technologists because of their great properties, like the optical properties of Cadmium Sulfide Nanoparticles are amazing and also easy to synthesize, but to make sure its quality it is equally essential to make out characterize it, this file will do the same in a lucid way!!
introduction to Tio2 nanostructures, properties of Tio2, current trends in biomedical application, general application of Tio2, synthesis of Tio2 nanoparticle by chemical route, characterization technique and objective.
Synthesis and characterization of ZnO nanoparticles via aqueous solution, sol...iosrjce
ZnO nanoparticles were synthesized by aqueous solution method, sol-gel method and hydrothermal
method.The synthesized particles were characterized by XRD ,SEM ,EDX and UV .The X-ray diffraction studies
reveals that the synthesized ZnO nanoparticles have wurtzite structure and the particle size varies from 13 to 18
nm. Scanning Electron Microscopic investigation reveals that the surface morphology of ZnO nanoparticle is
spherical in hydrothermal process and varies to flower like arrangement in aqueous solution and sol-gel
process. The UV-Visible spectrum of the nanoparticles shows a blue shift compared to that of the bulk sample.
Nanoparticles are particles between 1 and 100 nanometres in size with a surrounding interfacial layer. The interfacial layer is an integral part of nanoscale matter, fundamentally affecting all of its properties. The interfacial layer typically consists of ions, inorganic and organic molecules.
IOSR Journal of Applied Physics (IOSR-JAP) is an open access international journal that provides rapid publication (within a month) of articles in all areas of physics and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in applied physics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Natural Dye-Sensitized Solar Cells (NDSSCs) From Opuntia Prickly Pear Dye Usi...IJERA Editor
Natural dye-sensitized solar cells (NDSSCs) have gained considerable attention in the field of solar energy due to their simple fabrication, good efficiency, and low production cost. Natural dyes are environmentally and economically superior to ruthenium-based dyes because they are nontoxic and cheap. However, the conversion efficiency of dye-sensitized solar cells based on natural dyes is low. One way to improve the DSSC performance is to enhance the absorptivity of extracted natural dyes. We investigated the influence of various factors in the extraction process, such as utilization of different extraction approaches, the acidity of extraction solvent, and different compounds of solvents on the optical absorption spectra. It was found that we could considerably enhance the optical absorptivity of dye and consequently the performance of DSSC by choosing a proper mixture of ethanol, methanol and water. In this study, a photo electrode using ZnO doped TiO2 nanoparticles was prepared by sol-gel method. In this paper we investigate the optical absorption, functional group, surface morphology and elementary composition of pure TiO2, ZnO doped TiO2 nanoparticles and opuntia prickly pear dye extract by using UV-Visible, PL-Studies, FT-IR, FE-SEM and EDS analysis. Finally photocurrent-voltaic characterization of nanocrystaline natural dye solar cell using I-V studies. It was found that the levels of short-circuit current (Jsc), open-circuit voltage (Voc), fill factor (FF) and overall conversion efficiency (η).
Metallic nanoparticles (MNPs) is a type of nanoparticle which have a metal core composed of inorganic metal or metal oxide that is usually covered with a shell made up of organic or inorganic material or metal oxide.
Influence of reaction medium on morphology and crystallite size of zinc oxidejournal ijrtem
ABSTRACT : Zinc oxide nanoparticles were prepared by reacting zinc chloride and sodium hydroxide in different mediums such as chitosan, poly vinyl alcohol, ethanol and starch. The materials were characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD) studies, transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). Elemental analysis was done by energy dispersive X-ray Analysis (EDAX).
KEY WORDS : Nano zinc oxide, morphology, crystallite size
Synthesis, Characterization, Synergic Adsorption Photocatalytic Studies of No...ijtsrd
In this study Nano Zinc oxide and Titanium Oxide synthesized using Dextrose as fuel by solution combustion method. Thus obtained powder particle is characterized for their purity, porosity, stability, particle size and stoichiometry by FT IR, XRD, SEM EDAX, TEM, PL and UV VIS DRS Spectrum techniques. The Synthesis of Zinc oxide nanoparticles has high photo catalytic activity. The proposed mechanism for the photocatalytic degradation of Rhodamine Blue dye by ZnO was found to be due to the formation of hydroxyl radicals, which are active species in the photocatalytic reactions. The prepared catalyst was found to be stable and reusable for industrial application. V. Ramya | S. Indhumathi "Synthesis, Characterization, Synergic Adsorption- Photocatalytic Studies of Novel ZnO Nanoparticle" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-4 , June 2022, URL: https://www.ijtsrd.com/papers/ijtsrd50302.pdf Paper URL: https://www.ijtsrd.com/chemistry/analytical-chemistry/50302/synthesis-characterization-synergic-adsorption-photocatalytic-studies-of-novel-zno-nanoparticle/v-ramya
a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent - from MSE-HUST k54
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1. HA NOI UNIVERSITY OF SCIENCE AND TECHNOLOGY
**** ADVANCED TRAINING PROGRAM ****
OVERVIEWS OF INDEPENDENT STUDY:
SYNTHESIS OF ZnO-TiO2 CORESHELL
NANOSTRUCTURES BY HYDROTHERMAL
METHOD
Name : Hoàng Văn Tiến
Class : MSE-K54
ID Student : 20092697
Instructor : Dr. Nguyễn Duy Hùng-AIST
2. OUTLINE :
• Why i choose this topic?
• ZnO-TiO2 overviews
• Hydrothermal methods
• Process of researching
• Analysis method
• Results and discussions
• Summary
3. WHY I CHOOSE THIS TOPIC ?
Types of solar cell :
- Buried contact solar cell
• Cadmium telluride solar cell
• Copper indium gallium
selenide solar cells
• Dye-sensitized solar cell
• Gallium arsenide germanium
solar cell
• Hybrid solar cell
• - Organic solar cell
- Nanocrystal solar cell
- Plasmonic solar cell
- Plastic solar cell
- Polycrystalline solar cell
- Polymer solar cell
- Quantum dot solar cell
- Solid-state solar cell
- Thin film solar cell
- Monocrystalline solar cell
- Multijunction solar cell
- ……………………….
4. WHY I CHOOSE THIS TOPIC ?
• Harmful organic compounds in the ecological unit are the main concern
for the scientific society, which is causative agent of water pollution and
severe contamination of the environment. Waste-water containing organic
dyes (organicpollutants) inhibit sunlight penetration which
suppressesphotosynthetic reaction.
• Metal oxide semi-conducting nano materials have been proven to be very
efficient photocatalysts for the degradation of organic dye pollutants with
the help of solar light. In particular, TiO2 and ZnO are the most versatile
semiconductor oxides with applications across a wide range from
cosmetics to air purification.
• However, the poor consumption of solar energy and the short diffusion
length of photogenerated exciton are the two key factors restrictive to
further improvement of photocatalytic efficiency
develop new and efficient sunlight-sensitive
photocatalysts.
•
7. TiO2 (rutile )
- Pure titanium dioxide is colorless in the massive state, non-toxic, thermally stable, inert
versus acids, alkalis and solvents, and insoluble.
- Rutile is the most stable and the most abundant form
- Nanocrystalline TiO2 usually exhibits a wider band gap
than that of the bulk (3.03 eV for rutile and 3.20 eV for anatise)
Refractive index
Lattice Constants, Е
n=2.54 for anatise
or 2.75 for rutile at λ = 550 nm)
a = 4.593
c = 2.958
Brookite-orthorhombic
Anatise-tetragonal
8.
9.
10. HYDROTHERMAL METHODS
• The term “hydrothermal” usually refers to any heterogeneous reaction in
the presence of aqueous solvents or mineralizers under high pressure
and temperature conditions to dissolve and recrystallize materials that are
relatively insoluble under ordinary conditions.
• Uses : A large number of compounds belonging to practically all classes
have been synthesized under hydrothermal conditions: elements, simple
and complex oxides , tungstates , molybdates , carbonates, silicates
, germanates etc. Hydrothermal synthesis is commonly used to grow
synthetic quartz , gems and other single crystals with commercial value.
11.
12. EXPERIMENTALPROCEDURE
• Growth of ZnO nanorods array
• Deposition of TiO 2 shells on ZnO nanorods
• Materials characterization
• X‐ray diffraction (XRD) used to phase characterization and crystalline
size,
• Scanning electron microscopy (SEM) to morphology and
microstructure investigations.
• Diffusive UV‐visible‐NIR spectrometry to band gap calculations
• Solar cell fabrication and testing
13. GROWTH OF ZNO NANORODS ARRAY
• Process :
- Substrate preparation
- Growth ZnO nanorod
• Prepare :
-Zn(COOCH3)2.2H2O
- Zn(NO3)2 .6H2O
- DI water
-Dimethylformamide (DMF):
(CH3)2NC(O)H
-hexamethylenetetramine C6H12N4
-FTO substrate
-Powder coating gun
15. GROWTH ZNO NANOROD
•
2 (Zn(NO3)2 .6H2O) :1 HTMA
- 0.75 g Zn(NO 3)2 .6H2O +150ml DI
• 0.35 g hexamethylenetetramine +100ml D
•
1 (Zn(NO3)2 .6H2O) :1 HTMA
- 0.45 g Zn(NO 3)2 .6H2O +150ml DI
• 0.42 g hexamethylenetetramine +100ml D
•
2 (Zn(NO3)2 .6H2O) :1 HTMA
- 0.75 g Zn(NO 3)2 .6H2O +150ml DI
• 0.35 g hexamethylenetetramine +100ml DI
Editor's Notes
Guidance : sựhướngdẫn
Overall peak power conversion efficiency for current DSSCs is about 11%Current record for prototypes lies at 15%Dresden, Germany, January 16, 2013 – Heliatek GmbH, the leader in organic solar films, today announced a record breaking 12.0% cell efficiency for its organic solar cells. This world record, established in cooperation with the University of Ulm and TU Dresden, was measured by the accredited testing facility SGS. The measurement campaign at SGS also validated the superior low light and high temperature performances of organic photovoltaics (OPV) compared to traditional solar technologies.
Wurtzite :Hexagonal structures, same as CdSe, GaN…..
refractive index (n=2.54 for anataseor 2.75 for rutile at = 550 nm)