A5064782925- Luminescence Properties of Advanced Materials
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Advanced Condensed Matter Physics
- Perovskite Materials and Applications
- Ferroelectric and Piezoelectric Materials
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Crystal Structures and Properties
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Rare-earth and actinide compounds
- Dielectric properties of ceramics
- Transition Metal Oxide Nanomaterials
- Advanced Battery Materials and Technologies
- Heusler alloys: electronic and magnetic properties
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Microwave Dielectric Ceramics Synthesis
- Crystallography and molecular interactions
- Glass properties and applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Nanomaterials in Catalysis
- Copper-based nanomaterials and applications
- Luminescence and Fluorescent Materials
Oregon State University
2022-2025
Central Electrochemical Research Institute
2016-2025
Academy of Scientific and Innovative Research
2016-2024
Centre For Environment Architecture & Human Settlements
2016-2019
Indian Institute of Technology Madras
2004-2014
Council of Scientific and Industrial Research
2011-2014
Pohang University of Science and Technology
2007-2013
Efficient charge separation and transport are important factors in achieving high efficiency TiO2 photocatalysis dye-sensitized applications. Mesoporous (meso-TiO2) consisting of compactly packed nanoparticles can be a promising candidate for such purposes. In the present study, meso-TiO2 exhibiting an enhanced photocatalytic activity H2 evolution was synthesized by simple facile, template-free nonhydrothermal method. The highest compared to nonporous colloidal-TiO2 commercial Degussa P25...
The photocatalytic production of H2 in aqueous TiO2 colloid (with methanol as an electron donor) was greatly accelerated by the situ agglomeration although such should reduce activity most other cases because reduction surface area. occurred after induction period 3 h and ascribed to pH increase which resulted from nitrate (incorporated synthetic step sol) ammonia. at close isoelectric point colloidal 6.9 measured ζ-potential. It is proposed that charge separation facilitated hopping...
The electrochemical capacitive behavior of NiFe2O4 ceramic powders prepared by combustion synthesis, polyol-mediated and sol-gel methods was studied. phase formation morphological characterizations synthesized materials were carried out through thermal analysis (TG-DTA), powder X-ray diffraction (XRD) scanning electron microscopy (SEM). Electrochemical performance these electrode as capacitors investigated in aqueous NaCl electrolyte using cyclic voltammetry (CV) the corresponding specific...
White-light emission is generated by combining blue and green to yellow emissions of , respectively, in a single host lattice . The excitation the near-UV region role concentration on photoluminescence intensity [, 0.005, 0.0075, 0.01] studied, it found that critical Energy migration over sites occurs, resulting quenching. exhibits high absorption region. transfer from occurs Optimization produce white light shows optimum concentrations are 0.01 respectively. Partial energy responsible for...
Two mesoporous TiO2 samples (M1-TiO2 and M2-TiO2) with different morphologies were synthesized, the photocatalytic photoelectrochemical properties of both their photoplatinized counterparts (0.05, 0.1, 1.0 wt % Pt) systematically investigated. Electron microscopic analysis showed that M1-TiO2 consists densely packed nanoparticles forming spherical secondary particles (0.5 to μm), whereas M2-TiO2 is made up loosely agglomerated nanoparticles. Subsequently, this morphological difference led...
Hexagonal BiPO4·xH2O and Bi0.95Eu0.05PO4·xH2O nanoparticles were synthesized by a polyol-mediated method employing diethylene glycol. The powder X-ray diffraction revealed the phase purity isostructural nature of both undoped Eu3+-doped BiPO4. monoclinic Bi0.95Eu0.05PO4 was obtained heating hexagonal at 600 °C. microscopical characterization formation nanocrystalline materials. Water molecules present in bismuth precursor favoured low temperature. role DEG arresting particle growth during...
A graded nano-alloy of Au100−xPtx (x = 7, 15, 23, 32, 40, 51, 62, 73 and 86) nanoparticles (NPs) formed by co-reduction HAuCl4 H2PtCl6 the details are presented in this work. NPs were characterized using surface plasmon resonance (SPR) absorption spectroscopy transmission electron microscopy (TEM). The dispersed Vulcan carbon (Au100−xPtx/C) annealed at 250, 400, 600 800 °C. as-formed materials TEM, high resolution (HR-TEM), powder X-ray diffraction (XRD), cyclic voltammetry (CV)...
The intermetallic compound ${\mathrm{Nd}}_{2}{\mathrm{Co}}_{0.85}{\mathrm{Si}}_{2.88}$ having a triangular lattice could be synthesized in single phase only with defect crystal structure. Investigation through different experimental techniques indicate the presence of two magnetic transitions system. As verified experimentally and theoretically, high-temperature transition ${T}_{\mathrm{H}}\ensuremath{\sim}$ 140 K is associated development ferromagnetic interaction between itinerant Co...
Environmentally benign, highly stable oxides exhibiting desirable optical properties and high near-IR reflectance are being researched for their potential application as pigments. Mg1−xMxV2O6 (M = Mn, Cu, Co, or Ni) with brannerite-type structures were synthesized by the conventional solid-state reaction method to study properties. These series exhibit structural transitions from brannerite (C2/m) distorted (P1¯) NiV2O6-type structures. The average color of compounds varies reddish-yellow...
Sheets-on-sheet mesoporous Ni–Co-hydroxide/RGO nanocomposite with a specific capacitance of 835 F g<sup>−1</sup>was obtained by the chemical decomposition nickel cobalt hexacyanoferrate complex.
Butynediol (2-Butyne-1,4-diol), a well-known type-II brightening additive, changes the interfacial p H resulting in formation of porous cobalt hydroxide film ca. 1 μ m thickness over copper substrate short duration electrodeposition (2 min) and at very low current density (−5 mA cm −2 ) from sulfate bath. In absence butynediol, metallic layer was observed under identical deposition conditions. The choice anions (sulfates, chlorides nitrates) bath determines kind electrodeposited films...