A5101412624- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- CO2 Reduction Techniques and Catalysts
- Ionic liquids properties and applications
- Electrocatalysts for Energy Conversion
- Copper-based nanomaterials and applications
- Electronic and Structural Properties of Oxides
- Advanced battery technologies research
- ZnO doping and properties
- Thermodynamic properties of mixtures
- Chemical and Physical Properties in Aqueous Solutions
- Electrochemical Analysis and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Nanomaterials for catalytic reactions
- Surface Modification and Superhydrophobicity
- Quantum Dots Synthesis And Properties
- Metal complexes synthesis and properties
- Organometallic Compounds Synthesis and Characterization
- Inorganic and Organometallic Chemistry
- Synthesis and Characterization of Heterocyclic Compounds
- Advanced oxidation water treatment
- Mesoporous Materials and Catalysis
- Fuel Cells and Related Materials
- Carbon dioxide utilization in catalysis
- Analytical Chemistry and Sensors
North Bengal University
2019-2025
Tokyo University of Science
2016-2021
Indian Institute of Technology Kharagpur
1980-2017
Controlled crystal growth determines the shape, size, and exposed facets of a crystal, which usually has different surface physicochemical properties. Herein we report size facet control synthesis anatase TiO2 nanocrystals (NCs). The are found to play crucial role in photocatalytic activity NCs. This is due known preferential flow photogenerated carriers specific facets. Although, recent years, main focus been on increasing area high-energy such as {001} {100} improve activity, here...
Abstract This account deals with recent trends and challenges regarding photo(electro)chemical solar fuels produced by CO2 reduction water splitting. The process is limited product selectivity, catalyst stability, its complex reaction mechanism. A variety of catalysts—including thermocatalysts, photocatalysts, electrocatalysts, combinations photo- electrocatalysts—have been employed to facilitate selective durable reduction. In addition, the roles supporting electrolyte, pH, temperature,...
Photocatalytic TiO2/SiO2 coatings with excellent superhydrophilic wettability were prepared on light-weight polycarbonate substrates for self-cleaning applications. The effect of distinct SiO2 concentrations (0–40%) in TiO2 the morphology, wettability, UV–Vis transmittance, haze, and durability was studied detail. 20% silica showed wetting properties a smooth uniform morphology more than 85% transmittance. lower haze value confirms their clear optical appearance. A low-friction layer...
Electrochemical oxygen evolution reaction (OER) involves high overpotential at the evolving electrode and thereby suffers significant energy loss in proton exchange membrane water electrolyzer. To reduce OER overpotential, precious ruthenium iridium oxides are most commonly used as anode electrocatalyst. Here we report marked reduction for using transition metal (TM) doped TiO2 nanocrystals (NCs). This is attributed to d-orbitals splitting of TMs TM-doped NCs their interactions with...
The exposed facets of a crystal are known to be one the key factors its physical, chemical and electronic properties. Herein, we demonstrate role amines on controlled synthesis TiO2 nanocrystals (NCs) with diverse shapes different facets. chemical, physical properties as-synthesized NCs were evaluated their photoredox activity was tested. It found that intrinsic can enhanced by controlling environment surface, i.e.; through morphology evolution. In particular, rod shape ∼25% {101} ∼75%...
Electrochemical hydrogen production from water is an attractive clean energy generation process that has enormous potential for sustainable development. However, noble metal catalysts are most commonly used such electrochemical evolution making the cost ineffective. Thereby design of hybrid with minimal use metals using a suitable support material prime requirement electrolysis water. Herein, we demonstrate superior reaction (HER) activity platinum nanoparticles (Pt NPs) supported on faceted...
Semiconductor photocatalysis driven by electron/hole has begun a new era in the field of solar energy conversion and storage. Here we report fabrication optimization TiO2/BDD p-n heterojunction photoelectrode using p-type boron doped diamond (BDD) n-type TiO2 which shows enhanced photoelectrochemical activity. A BDD was first deposited on Si substrate microwave plasma chemical vapor deposition (MPCVD) method then sputter coated top grains for different durations. The microstructural studies...
Abstract Competitive hydrogen evolution and multiple proton-coupled electron transfer reactions limit photoelectrochemical CO 2 reduction in aqueous electrolyte. Here, oxygen-terminated lightly boron-doped diamond (BDD L ) thin films were synthesized as a semiconductor source to accelerate reduction. However, BDD alone could not stabilize the intermediates of reduction, yielding negligible amount products. Silver nanoparticles then deposited on because their selective electrochemical...
Schematic representation of covalent triazine framework deposited over Cu 2 O/SnO nanostructures for enhanced photocatalytic CO reduction to produce primarily and CH 4 .
Abstract Primary challenges in electrochemical CO 2 reduction lie with its product selectivity and competitive hydrogen evolution reaction (HER). Therefore, selective less or without any is very essential for industrial interests. In this study, we report a at boron‐doped diamond electrode modified Cu nanoparticles ionic liquid. addition to the improved selectivity, control of HER was also achieved work.
Effective and facile electrochemical oxidation of chemical fuels is pivotal for fuel cell applications. Herein, we report the electrocatalytic hydrazine on a citrate-capped Au-TiO2-modified glassy carbon electrode, which follows two different paths. These pathways are ascribed to occur Au activated TiO2 surface Au-TiO2 hybrid electrocatalyst. This activation was achieved through molecular capping by citrate, leads favorable with lower Tafel slope compared that clean respective materials, is, TiO2.
Here, we have investigated some physicochemical parameters to understand the molecular interactions by means of density (ρ) measurement, measurement viscosity (η), refractive index(nD) and conductance surface tension measurements between two significant aqueous ionic liquid solutions: benzyl trimethyl ammonium chloride (BTMAC) triethyl (BTEAC) in an l-methionine (amino acid) solution. The apparent molar volume (Φv), coefficient (B), refraction (RM) been used analyze interaction behavior...
Abstract In this work, we report a facile synthesis of Cu−SnO x hybrid nanostructures on lightly boron‐doped diamond (BDD L ) electrodes by potentiodynamic electrodeposition method. The deposition potential for was cycled between 0 to −1.0 V vs Ag/AgCl five consecutive runs at scan rate 50 mV/sec. growth the BDD optimized varying number cycles and precursor concentration. A uniform particle size distribution obtained using 10 mM CuSO 4 5 SnCl 2 in aqueous NaNO 3 . Detail surface morphology...
Titanium dioxide (TiO2) has been widely used as a catalyst material in different applications such photocatalysis, solar cells, supercapacitor, and hydrogen production, due to its better chemical stability, high redox potential, wide band gap, eco-friendly nature. In this work TiO2 thin films have deposited onto both glass silicon substrates by the atmospheric pressure plasma jet (APPJ) technique. The structure morphological properties of are studied using characterization techniques like...
Visible light irradiation induces recrystallization of Cu<sub>2</sub>O cubes to [010] growth-directed CuO nanoribbons in water due the creation active ˙OH and ˙O<sub>2</sub><sup>−</sup> species outward Cu diffusion along unstable {010} facets.
Boron-doped diamond (BDD) electrodes have a wide potential window and can produce ozone by water electrolysis at high voltage. Though has strong oxidative power (standard oxidation potential: 2.07 V vs. NHE), it cannot decompose certain types of recalcitrant organic matter completely. We developed an advanced process (AOP), in which hydroxy radicals with stronger 2.85 NHE) are formed using combination ozone, photocatalyst, UV. In this study, we fabricated mesoporous TiO2/BDD hybrid electrode...
There is a need for highly efficient photocatalysts, particularly water purification. In this study, we fabricated mesoporous TiO₂ thin film on boron-doped diamond (BDD) layer by surfactant-assisted sol-gel method, in which self-assembled amphiphilic surfactant micelles were used as an organic template. Scanning electron microscopy revealed uniform mesopores, approximately 20 nm diameter, that hexagonally packed the film. Wide-angle X-ray diffraction and Raman spectroscopy clarified...
Titanium dioxide (TiO2) is a wide band gap semiconductor that has been extensively used in several environmental applications including degradation of organic hazardous chemicals, water splitting to generate hydrogen, dye sensitized solar cells, self cleaning agents, and pigments. Herein we demonstrate the synthesis TiO2 nanocrystals (NCs) with shapes ellipsoids, rods, cuboids, sheets different exposed facets using noncorrosive nontoxic chemical (i.e. diethanolamine) as shape controlling...
Abstract Some new metal complexes of 1-amidino-2-thioureas† and its S- N-alkyl derivatives have been isolated characterized by electronic, vibrational pmr spectral studies, magnetic conductance measurements thermal analysis. The ligands behave as SN or NN donors depending mainly on the pH medium nature atom. Protonation at central nitrogen atom chelate ring converts inner to cationic ones vice-versa. Electronic data confirm presence strong currents in these chelates. Probable structures...
Electrochemical NO 3 RR by the faceted Cu 2 O NCs in acidic medium for production of NH .