In attendance study focuses on the removal of ZnO nano particles by green chemical reduction method from
the bio components of leaves extract of Gigantic-Swallow-Wort. X-Ray Diffraction (XRD), FT-IR Spectroscopy
characterizations was done for synthesized ZnO nanoparticles. X- ray diffraction studies showed that the particles
are hexagonal in scenery.
The sol-gel route is a simple chemical m
through bonding of atoms at the scale of 10
fabrication of oxides of metals chemically.
chemical & optical are enhanced
that, the relative surface area of the
with the bulk material. Controlling the annealing temperature would result in various
micro structures for the compound being produced.
acid solution was formed by stirring
minutes and subsequently annealed at 400°C.
particles decreased along with
increase of the silica content in the mixture.
In attendance study focuses on the removal of ZnO nano particles by green chemical reduction method from
the bio components of leaves extract of Gigantic-Swallow-Wort. X-Ray Diffraction (XRD), FT-IR Spectroscopy
characterizations was done for synthesized ZnO nanoparticles. X- ray diffraction studies showed that the particles
are hexagonal in scenery.
The sol-gel route is a simple chemical m
through bonding of atoms at the scale of 10
fabrication of oxides of metals chemically.
chemical & optical are enhanced
that, the relative surface area of the
with the bulk material. Controlling the annealing temperature would result in various
micro structures for the compound being produced.
acid solution was formed by stirring
minutes and subsequently annealed at 400°C.
particles decreased along with
increase of the silica content in the mixture.
Nano porous membranes for water purification by shrinath ghadgeShrinath Ghadge
Continuous population growth and urbanization as well as rapid industrialization, causing huge contamination of potable water or underground water, has been a serious concern all over the world. Due to incompetency of conventional water purification technologies to deliver complete pollutants free water at an economical price, a high performance, cost-effective and environmentally acceptable separation system is an urgent need which should not only remove macro-, micro- and nano-pollutants but also desalinate water to a significant extent. In this milieu, nanotechnology based carbon nanotube (CNT) membranes have shown impressive breakthroughs towards water purification as compared to existing energy intensive water purification systems and thus, this technology has immense potential for large scale commercial water purification in a cost effective manner.
Visible light solar photocatalytic degradation of pulp and paper wastewater u...eSAT Journals
Abstract
With the growing number of industries there are large volumes of wastewater generated every day. Pulp and paper mills are highly polluting as they release effluents containing organic pollutants, and high levels of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). Even though well-established processes exist to treat these effluents, there are only a few processes which are energy efficient. Conventional treatment methods are not effective for the degradation of toxic organic pollutants, hence other treatment techniques are necessary. One of the recent developments in this field is the Advanced Oxidation Process (AOP). Solar photocatalysis is a type of AOP which utilises UV light to activate semiconductor photocatalyst in order to produce highly reactive radical species. TiO2 is a widely used catalyst for this purpose, to oxidise or reduce the organic pollutants in industrial wastewater. However, photocatalysis using visible light has been receiving increased attention hence, modification of TiO2 is necessary for its enhanced response to visible light. There are many methods for modifying TiO2, such as doping and photo-sensitisation. This study focusses on the modification of TiO2 using the method of dye-sensitisation (photo-sensitisation) with the dyes rhodamine B and methylene blue. Solar photocatalytic experiments were carried out for the degradation of pulp and paper wastewater, at different conditions like varying catalyst loading (500mg, 600mg, 750mg and 1000mg of catalyst for 300ml of aqueous wastewater) and effluent concentration (20ml, 25ml, 30ml and 35ml of wastewater). Preliminary tests were done to determine the best conditions for photocatalytic degradation, and these were applied for final tests. Keywords - Solar Photocatalysis, Visible Light, Dye Sensitisation, Pulp and paper, Methylene blue, Rhodamine B, TiO2 catalyst.
Evaluation of some heavy metals in roadside soil along Samaru-Giwa road, Zari...Innspub Net
This research work was carried out to evaluate the concentrations of some heavy metals (Pb, Cd, Cu, Zn and Mn) in roadside soil along Samaru-Giwa road, Zaria, Nigeria. Four sampling locations were selected (ABUTH, NAPRI, Marabar Guga and ABU Dam Quarters in Ahmadu Bello University, Zaria main campus which served as the control site). Soil samples were collected at 0, 50, 100 and 200 m distances from the roadside in three replicates, air dried at room temperature, sieved and kept in specimen bottles with appropriate labels pending analysis. Samples were digested and analyzed for concentrations of Lead (Pb), Cadmium (Cd), Copper (Cu), Zinc (Zn) and Manganese (Mn) using Atomic Absorption Spectrophotometer (AAS). Concentrations of these heavy metals were observed to be significantly higher at 0 m than the other distances from the roadside and this decreased with increasing distance from the roadside. There was generally no significant difference in soil heavy metal concentration at 50- 200 m from the roadside. Soil lead concentration was mostly observed to be higher than that of all other metals studied. The concentrations of heavy metals observed in the soil samples was in the order of Pb>Mn>Zn >Cd >Cu. The contamination factors for individual heavy metal for the locations showed low to moderate contamination by the metals. Among the locations studied, Ahmadu Bello University Teaching Hospital, (ABUTH) showed the highest concentration of the most heavy metals while ABU Dam Quarters (Control), had the lowest concentration of most of the heavy metals. The study showed that, nearness to the roadside increased the soil heavy metal concentrations and this could invariably influence the same in crops planted or farm produce being dried along the roadside.
Surface Modification of Nanoparticles for Biomedical ApplicationsReset_co
Surface ligands on nanoparticles control their properties and interactions, which can be harnessed for biomedical imaging, cell targeting, and therapeutic applications.
Removal of heavy metals from wastewater by carbon nanotubesAshish Gadhave
Advent of nanotechnology has introduced us with new generation of adsorbents such as carbon nanotubes (CNTs)
which have aroused widespread attention due to their outstanding ability for the removal of various inorganic and
organic pollutants from large volumes of water. This article reviews the practical feasibility of various kinds of raw
and surface modified carbon nanotubes for adsorption of heavy metal ions from wastewater. Further, properties of
CNTs (adsorption sites), characterization of CNTs (pore volume, BET surface area, surface total acidity, surface
total basicity) and solution properties (ionic strength, effect of pH) are explained very well. The adsorption
mechanisms are mainly attributable to chemical interactions between metal ions and surface functional groups of the CNTs. The adsorption capacity increases to greater extend after functionalization i.e. surface oxidation of CNTs. Future work on developing cost effective ways of production of CNTs and analyzing its toxicity are recommended.
Remarkable self-organization and unusual conductivity behavior in cellulose n...Pawan Kumar
Aqueous suspensions of cellulose nanocrystals were blended with Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) [PEDOT:PSS], and cast into thin films. The morphology, structure and electrical properties of the resulting nanocomposite thin films were thoroughly characterized. We found that the CNC–PEDOT:PSS blends self-organize into a layered vertical stack with a pitch of 100–200 nm while retaining a continuous percolation network for PEDOT. Atomic force microscopy, dynamic light scattering and multi-angle light scattering measurements confirmed the wrapping of polymer chains around the rod-like CNCs. The blended films exhibited improved molecular ordering of the PEDOT chains with concomitant improvement in the carrier mobility. The remarkable self-organization and enhanced structural order enabled the CNC–PEDOT:PSS blends to exhibit a high conductivity typical of PEDOT:PSS even when the content of the insulating CNCs in the nanocomposite was as high as 50 wt%.
Nano porous membranes for water purification by shrinath ghadgeShrinath Ghadge
Continuous population growth and urbanization as well as rapid industrialization, causing huge contamination of potable water or underground water, has been a serious concern all over the world. Due to incompetency of conventional water purification technologies to deliver complete pollutants free water at an economical price, a high performance, cost-effective and environmentally acceptable separation system is an urgent need which should not only remove macro-, micro- and nano-pollutants but also desalinate water to a significant extent. In this milieu, nanotechnology based carbon nanotube (CNT) membranes have shown impressive breakthroughs towards water purification as compared to existing energy intensive water purification systems and thus, this technology has immense potential for large scale commercial water purification in a cost effective manner.
Visible light solar photocatalytic degradation of pulp and paper wastewater u...eSAT Journals
Abstract
With the growing number of industries there are large volumes of wastewater generated every day. Pulp and paper mills are highly polluting as they release effluents containing organic pollutants, and high levels of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). Even though well-established processes exist to treat these effluents, there are only a few processes which are energy efficient. Conventional treatment methods are not effective for the degradation of toxic organic pollutants, hence other treatment techniques are necessary. One of the recent developments in this field is the Advanced Oxidation Process (AOP). Solar photocatalysis is a type of AOP which utilises UV light to activate semiconductor photocatalyst in order to produce highly reactive radical species. TiO2 is a widely used catalyst for this purpose, to oxidise or reduce the organic pollutants in industrial wastewater. However, photocatalysis using visible light has been receiving increased attention hence, modification of TiO2 is necessary for its enhanced response to visible light. There are many methods for modifying TiO2, such as doping and photo-sensitisation. This study focusses on the modification of TiO2 using the method of dye-sensitisation (photo-sensitisation) with the dyes rhodamine B and methylene blue. Solar photocatalytic experiments were carried out for the degradation of pulp and paper wastewater, at different conditions like varying catalyst loading (500mg, 600mg, 750mg and 1000mg of catalyst for 300ml of aqueous wastewater) and effluent concentration (20ml, 25ml, 30ml and 35ml of wastewater). Preliminary tests were done to determine the best conditions for photocatalytic degradation, and these were applied for final tests. Keywords - Solar Photocatalysis, Visible Light, Dye Sensitisation, Pulp and paper, Methylene blue, Rhodamine B, TiO2 catalyst.
Evaluation of some heavy metals in roadside soil along Samaru-Giwa road, Zari...Innspub Net
This research work was carried out to evaluate the concentrations of some heavy metals (Pb, Cd, Cu, Zn and Mn) in roadside soil along Samaru-Giwa road, Zaria, Nigeria. Four sampling locations were selected (ABUTH, NAPRI, Marabar Guga and ABU Dam Quarters in Ahmadu Bello University, Zaria main campus which served as the control site). Soil samples were collected at 0, 50, 100 and 200 m distances from the roadside in three replicates, air dried at room temperature, sieved and kept in specimen bottles with appropriate labels pending analysis. Samples were digested and analyzed for concentrations of Lead (Pb), Cadmium (Cd), Copper (Cu), Zinc (Zn) and Manganese (Mn) using Atomic Absorption Spectrophotometer (AAS). Concentrations of these heavy metals were observed to be significantly higher at 0 m than the other distances from the roadside and this decreased with increasing distance from the roadside. There was generally no significant difference in soil heavy metal concentration at 50- 200 m from the roadside. Soil lead concentration was mostly observed to be higher than that of all other metals studied. The concentrations of heavy metals observed in the soil samples was in the order of Pb>Mn>Zn >Cd >Cu. The contamination factors for individual heavy metal for the locations showed low to moderate contamination by the metals. Among the locations studied, Ahmadu Bello University Teaching Hospital, (ABUTH) showed the highest concentration of the most heavy metals while ABU Dam Quarters (Control), had the lowest concentration of most of the heavy metals. The study showed that, nearness to the roadside increased the soil heavy metal concentrations and this could invariably influence the same in crops planted or farm produce being dried along the roadside.
Surface Modification of Nanoparticles for Biomedical ApplicationsReset_co
Surface ligands on nanoparticles control their properties and interactions, which can be harnessed for biomedical imaging, cell targeting, and therapeutic applications.
Removal of heavy metals from wastewater by carbon nanotubesAshish Gadhave
Advent of nanotechnology has introduced us with new generation of adsorbents such as carbon nanotubes (CNTs)
which have aroused widespread attention due to their outstanding ability for the removal of various inorganic and
organic pollutants from large volumes of water. This article reviews the practical feasibility of various kinds of raw
and surface modified carbon nanotubes for adsorption of heavy metal ions from wastewater. Further, properties of
CNTs (adsorption sites), characterization of CNTs (pore volume, BET surface area, surface total acidity, surface
total basicity) and solution properties (ionic strength, effect of pH) are explained very well. The adsorption
mechanisms are mainly attributable to chemical interactions between metal ions and surface functional groups of the CNTs. The adsorption capacity increases to greater extend after functionalization i.e. surface oxidation of CNTs. Future work on developing cost effective ways of production of CNTs and analyzing its toxicity are recommended.
Remarkable self-organization and unusual conductivity behavior in cellulose n...Pawan Kumar
Aqueous suspensions of cellulose nanocrystals were blended with Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) [PEDOT:PSS], and cast into thin films. The morphology, structure and electrical properties of the resulting nanocomposite thin films were thoroughly characterized. We found that the CNC–PEDOT:PSS blends self-organize into a layered vertical stack with a pitch of 100–200 nm while retaining a continuous percolation network for PEDOT. Atomic force microscopy, dynamic light scattering and multi-angle light scattering measurements confirmed the wrapping of polymer chains around the rod-like CNCs. The blended films exhibited improved molecular ordering of the PEDOT chains with concomitant improvement in the carrier mobility. The remarkable self-organization and enhanced structural order enabled the CNC–PEDOT:PSS blends to exhibit a high conductivity typical of PEDOT:PSS even when the content of the insulating CNCs in the nanocomposite was as high as 50 wt%.
A NOVEL PRECURSOR IN PREPARATION AND CHARACTERIZATION OF NICKEL OXIDE (NIO) A...antjjournal
Synthesis of Nickel Oxide (NiO) nanoparticles and cobalt oxide (CO3O4) materials synthesis by aqueous chemical growth (ACG) Techniques. Oxide based material having a wide band gap, and suitable for optical devices,Optoelectronic devices, UV photodetector, and Light emitting diode LEDs. The analysis
and characterizationof Nickel Oxide (NiO) and cobalt oxide (CO3O4) nanoparticles by(1) X-ray diffraction (XRD), (2) Scanning electron microscopy (SEM), and (3) Ultraviolet–visible (UV–Vis) spectroscopy.
WHO SHOULD ATTEND?
All personnel involved in materials & chemical
reactions, and radioactive solutions fields:
Researchers, Academics, Postgraduates Students,
Chemists, Chemical Engineers, Material Engineers,
Materials, Rare Earth Manufacturer, CEOs.
Needless to say, adsorption process is
unambiguously important for remediation of
contaminated water and soil by adsorbents. In
general, performance of the adsorbents has been
normally assessed by capacity of the adsorbents.
However, not only property of the adsorbents but also chemical speciation of the contaminants is definitely important for removal efficiency. The chemical speciation of the contaminants is definitely one of the most important factors. However, especially for material scientists, it is often forgetful factor. If you have to treat multi-valence and redox sensitive heavy metals and rare earths, their chemical speciation cannot be omitted because their chemical forms are
easily changed depending on several chemical factors such as pH, redox, dissolved carbonate and phosphate concentration and so on. Therefore, the material scientists in charge of remediation for contaminated water and soil should always consider the chemical speciation of target contaminants.
In this context, basis on chemical speciation for the remediation will be reviewed and our application and modeling works with careful consideration on chemical speciation for remediation of contaminated water will be introduced to the audiences in this talk.
IA Literature Review on Synthesis and Characterization of enamelled copper wi...Editor IJCATR
This paper discusses about the survey on the various magazines, conference papers and journals for understanding the
properties of enamelled copper wires mixed with nano fillers, fundamental methods for synthesis and characterization of carbon
nanotubes. From all these papers, it was noted that the research work carried out in an enamelled copper wires filled with nano fillers
has shown better results. It was also recorded that the research work was carried mostly with single metal catalysts and very little
amount of research work has been carried out on the synthesis of carbon nanotubes using bimetallic catalysts.
Similar to Resume Of Jian Liu Adsorption Vanderbilt University (20)
IA Literature Review on Synthesis and Characterization of enamelled copper wi...
Resume Of Jian Liu Adsorption Vanderbilt University
1. Liu, 1
Jian Liu
111 Acklen Park Dr., Apt. E108 (615) 498-8001
Nashville, TN 37203 jian.liu@vanderbilt.edu
Objective
Obtain a R&D or engineering position in the areas of gas adsorption applications, adsorbents and catalysts
development, related material chemical and physical characterizations.
Strengths
Gas adsorption: fundamental theory, surface area and pore size analysis, CO2 and H2O adsorption,
gravimetric & volumetric methods, breakthrough system, Rubotherm system, and apparatus design.
Material development: carbon nanotube, nano particles, zeolites, carbon, MOFs, biphasic impregnated silica.
Analytical instrument: Powder and Particle Size Analyzer, Zeta-potential Analyzer, XRD, BET, GC, FT-IR,
UV-VIS, TGA-DSC, SEM (+EDS), TEM, and MS.
Computer related: Matlab/Simulink, Mathematica, Fortran, C, Aspen Plus, LabVIEW, ChemOffice,
Materials Studio, LaTex, Origin, Igor, Endnote, Adobe Acrobat, and Microsoft Office.
Education
Vanderbilt University-Ph.D. in Chemical Engineering summer 2010
Ph.D summer 2010 research on gas adsorption and novel adsorbents GPA: 3.9/4.0
Advisor: M. Douglas LeVan (J. Lawrence Wilson Professor of Engineering)
Thesis title: Adsorption Equilibrium and Mass Transfer in Metal-Organic Framework Adsorbents
Chinese Academy of Sciences (CAS)-Master of Chemical Engineering 5/2006
• Graduate in the top 5 % of the class GPA: 3.7/4.0
Beijing Institute of Technology (BIT)-Bachelor of Chemical Engineering, 8/2003
• Excellent Undergraduate Scholarship: Awarded 1999-2001 GPA: 3.8/4.0
Research Experience
Vanderbilt University
Research Assistant 7/2007 – present
• Study and understand capturing CO2 from flue gas by using metal organic frameworks (MOFs) as novel
adsorbents; use volumetric method to examine H2O effects on the CO2 adsorption (DOE project)
• Design and characterize novel adsorbents for energy storage and environmental protection
• Calculate thermodynamic properties for light gases adsorbed on carbon surfaces
• Investigate adsorption kinetics through frequency response method (zeolites, MOFs)
Institute of Process Engineering, CAS
Research Assistant 8/2004 – 5/2006
• Synthesized and studied the particle size and surface properties for NiO nanoparticles
• Synthesized nano thin film through sol-electrophoretic deposition method
• Designed and studied NiO film used for formaldehyde gas sensor
Institute of Chemistry, CAS
Undergraduate Research Assistant 2/2003 – 7/2003
• Synthesized hydroxyl modified carbon nanotubes by melted salt method
2. Liu, 2
Beijing Institute of Technology
Undergraduate Research Assistant 9/2002 – 1/2003
• Assisted the research on polymer/montmorillonite intercalation nanocomposites
Selected Publications and Presentations*
Jian Liu, Yu Wang, Annabelle I. Benin, Paulina Jakubczak, Richard R. Willis, and M. Douglas LeVan. CO2/H2O
Adsorption Equilibrium and Rates on Metal-Organic Frameworks: HKUST-1 and Ni/DOBDC. (Langmuir, under
review, 2010)
M. Douglas LeVan, Amanda M.B. Furtado, Jian Liu, and Yu Wang. Ordered Mesoporous Silica-Metal Organic
Composite Adsorbent, Methods of Making and Applications of the same. (US Patent pending, 61,348,805)
Jian Liu and M. Douglas LeVan. Henry's law constants and isosteric heats of adsorption at zero loading for multi-
wall carbon surfaces with different geometries. Carbon, 48, 3454-3462, 2010.
A. Ozgur Yazaydin, Randall Q. Snurr, Tae-Hong Park, Kyoungmoo Koh, Jian Liu, M. Douglas LeVan, Annabelle
I. Benin, Paulina Jakubczak, Mary Lanuza, Douglas B. Galloway, John J. Low, and Richard R. Willis. Screening of
Metal-Organic Frameworks for Carbon Dioxide Capture from Flue Gas Using a Combined Experimental and
Modeling Approach. J. Am. Chem. Soc., 131, 18198–18199, 2009.
Jian Liu and M. Douglas LeVan. Isosteric heats of adsorption in the Henry’s law region for carbon single wall
cylindrical nanopores and spherical nanocavities. Carbon, 47, 3415-3423, 2009.
Jian Liu, Shangfeng Du, Lianqi Wei, Haidi Liu, Yajun Tian, Yunfa Chen. Template-free synthesis of NiO hollow
microspheres covered with nanoflakes. Mater. Lett., 60, 3601-3604, 2006.
Shangfeng Du, Yajun Tian, Haidi Liu, Jian Liu, Yunfa Chen. Calcination effects on the properties of Gallium-
doped zinc oxide powders. J. Am. Ceram. Soc. 89, 2440-2443, 2006.
*Jian Liu, Yu Wang, M. Douglas LeVan, Annabelle I. Benin, Paulina Jakubczak, and Richard R. Willis.
Coadsorption of CO2 and H2O on MOFs: Adsorption Equilibrium, Rates of CO2 Adsorption, and Comparisons with
Zeolites. 10th International Conference on Fundamentals of Adsorption, Japan, 2010.
*Jian Liu, Yu Wang, Annabelle I. Benin, Paulina Jakubczak, Richard R. Willis and M. Douglas LeVan. CO2/H2O
adsorption equilibrium and rates on HKUST-1 and Ni/DOBDC. AIChE Annual Meeting, 2009.
*Jian Liu and M. Douglas LeVan. Isosteric heats of adsorption in the Henry’s law region for carbon single wall
cylindrical nanopores and spherical nanocavities. Plenary Session, AIChE Annual Meeting, 2009.
*Annabelle I. Benin, Syed Faheem, John J. Low, Richard R. Willis, Antek G. Wong-Foy, Kyoungmoo Koh, Adam
J. Matzger, A. Ozgur Yazaydin, Randall Q. Snurr, Xiayi Hu, Stefano Brandani, Jian Liu, and M. Douglas LeVan.
Metal Organic Frameworks for Carbon Dioxide Adsorption from Flue Gas. AIChE Annual Meeting, 2008.
Awards and Affiliations
• Graduate student travel grant, Vanderbilt University, 2009
• Graduate Teaching & Research Scholarship, Vanderbilt University, 2006-2010
• Excellent Graduate, Institute of Process Engineering, CAS, 2006
• Dean’s Scholarship, Institute of Process Engineering, CAS, 2005
• Excellent Undergraduate Scholarship, BIT, 1999-2001
• Sigma Xi full membership since 2010
• AIChE graduate student membership since 2008
• Chair, Student Union of Institute of Process Engineering, CAS, 2004-2005