A5046222961- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Aerogels and thermal insulation
- Chalcogenide Semiconductor Thin Films
- Gold and Silver Nanoparticles Synthesis and Applications
- Corrosion Behavior and Inhibition
- Supercapacitor Materials and Fabrication
- TiO2 Photocatalysis and Solar Cells
- Mesoporous Materials and Catalysis
- Surface Modification and Superhydrophobicity
- Advancements in Battery Materials
- ZnO doping and properties
- Catalytic Processes in Materials Science
- Metal and Thin Film Mechanics
- Chemical Synthesis and Reactions
- Electrodeposition and Electroless Coatings
- Silicone and Siloxane Chemistry
- Nanoparticles: synthesis and applications
- Conducting polymers and applications
- Electrocatalysts for Energy Conversion
- Nanomaterials for catalytic reactions
- Sulfur-Based Synthesis Techniques
- X-ray Diffraction in Crystallography
- Nanocomposite Films for Food Packaging
International Advanced Research Centre for Powder Metallurgy and New Materials
2013-2022
Indian Institute of Technology Madras
2018
Indian Institute of Chemical Technology
2006-2010
Savitribai Phule Pune University
2003-2007
University of Hyderabad
2007
National Chemical Laboratory
2004
Fritz Haber Institute of the Max Planck Society
2004
Research & Development Establishment (Engrs.)
2001
Cu-doped TiO2 with varying amounts of Cu (0.2, 0.3, 0.5, 1, 2, and 5) are prepared by impregnation method calcined at 350 450 °C for 5 h. These catalysts characterized X-ray diffraction, diffuse reflectance spectroscopy (DRS), photoelectron (XPS), scanning electron microscopy energy-dispersive (EDAX), transmission (TEM). The DRS studies clearly showing the expanded photo response into visible region on copper ions. TEM images depicting fine dispersion particles surface. XPS change in binding...
Shape evolution of nanostructured LaFeO3 with fascinating morphologies like cubes, rods and spheres was successfully synthesized by a facile environmentally friendly hydrothermal process. Tuning the achieved using different surfactants. The prepared samples were systematically characterized X-ray diffraction, micro-Raman spectroscopy, scanning electron microscopy high-resolution transmission for structural, morphological chemical composition analysis photoelectron spectroscopy. optical...
A rapid microwave solid-state synthesis method is systematically investigated to achieve a H2 producing visible light active spinel photocatalyst. ZnFe2O4 nanocrystallites were obtained by irradiation of precursor compacts under optimized conditions. This investigation led uniform sized nanocrystalline photocatalyst that yielded quantum-yield evolution ∼3.8 times higher than conventionally synthesized ZnFe2O4. The parameters – power, temperature, and time, found control the physico-chemical...
This paper investigates solar radiation-induced photocatalytic hydrogen generation using spinel ZnFe2O4 (ZFO) photocatalysts fabricated different routes, viz., solid state reaction (SSR), polymer complex (PC), microwave sintering (μW) and self-propagating combustion (SPC) method. The physicochemical properties of the like crystallinity, surface area, band gap energetics is studied as it influences their photochemical behavior. study reveals a high crystallinity ZFO photocatalysts, those are...
Processing in an oxygen rich atmosphere induced superior energy properties lead free ferroelectric BCZT thin films.
Abstract Intermolecular interactions, such as hydrogen bonding, dipolar and van der Waals, occurring in molecular crystals cover a range of magnitudes. As the crystal evolves from relatively softer state nanoscopic size regime to harder one microcrystalline bulk solid state, impact hierarchy intermolecular interactions can be expected emerge progressive fashion. The strongest alone would manifested at small sizes; grows, effect weaker ones will added on, with exhibiting cumulative different...
Visible light sensitive Fe(3+) and Ce(4+) co-doped nano TiO(2) photocatalyst has been prepared by a modified aqueous sol-gel method the activity measured in terms of degradation MB dye. Both dopants shifted absorption profile to visible region improved activity. ions trapped charge carriers due stable electronic configuration their separation. ions, which were mainly located at grain boundaries, cause dislocations bending valence conduction bands prevent recombination photoexcited electrons...
Zinc sulphide nanoparticles doped with manganese (ZnS:Mn) have been stabilized using thioglycerol [HSCH2CH(OH)CH2OH] molecules. The (∼1.7 nm) are highly stable and exhibit photoluminescence at ∼600 nm when excited ultraviolet light. For increasing luminescence stability the particles further treated tetraethylorthosilicate (TEOS)[Si(C2H5O)4] in an aqueous medium, yielding either a disordered silica matrix or spherical core-shell of up to ∼900 size strongly enhanced under certain conditions....
Abstract Nanocomposites of modified chitosan, carboxymethyl chitosan (CMCh) with hydroxyapatite (HAP) have been prepared by coprecipitation technique. Totally three nanocomposites containing 80/20, 50/50, and 20/80 HAP/CMCh were characterized using transmission electron microscopy (TEM), X‐ray diffraction (XRD), fourier transformed infrared spectroscopy (FTIR), photoelectron (XPS), thermogravimetry (TG), scanning (SEM). Modified CMCh, which is water soluble can be used for drug delivery...
Layer structured vanadium pentoxide (V2O5) microparticles were synthesized hydrothermally and successfully decorated by a facile wet chemical route, with ∼10-20 nm sized ruthenium nanoparticles. Both V2O5 nanoparticle (1%Ru@V2O5) investigated for their suitability as resistive gas sensors. It was found that the 1%Ru@V2O5 sample showed very high selectivity sensitivity towards ammonia vapors. The measurements carried out at 30 °C (room temperature), 50 100 °C. best results obtained room...
For the first time, a ferrite nanocomposite photoelectrode (FNCP) has been fabricated and investigated for photoelectrochemical hydrogen production from water under simulated solar light. The ZnFe2O4:Fe2O3 photoanode via single step methodology using novel approach involving solution precursor plasma spraying technique. FNCP is achieved by optimal phase formation during deposition of film (∼10 μm) over stainless steel substrate. It exhibits an enhanced photoactivity 6 times higher compared...