Performance improvement strategies of CuWO4 photocatalyst for hydrogen generation and pollutant degradation. Issue 5 (October 2020)

• Record Type: Journal Article
• Authors: Raizada, Pankaj; Sharma, Sonali; Kumar, Abhinandan; Singh, Pardeep; Parwaz Khan, Aftab Aslam; Asiri, Abdullah M.
• Is Part Of: Journal of environmental chemical engineering. Volume 8:Issue 5(2020)
• Publication Date: 2020-10
• Subjects: AOP Advanced oxidation process -- AO Auramine -- AZII Azure II -- BET Brunauer-Emmett-Teller -- CB Conduction band -- DFT Density functional theory -- DRS Diffuse reflectance spectroscopy -- EHP Electron-hole pair -- e- Electrons -- FESEM Field emission scanning electron microscope -- FTIR Fourier transform infrared spectroscopy -- ΔG Gibbs free energy change -- HRTEM High resolution transmission electron microscopy -- h+ Holes -- HET Hot electron transfer -- HER Hydrogen evolution reaction -- OH Hydroxyl radical -- IPEC Incident photons conversion efficiency -- LMCT Ligand to metal charge transfer -- MG Malachite green -- MMCT Metal to metal charge transfer -- MO Methyl orange -- MWCT Multi-wall carbon nanotubes -- NFs Nanofibrous -- NPs Nanoparticles -- NIR Near infrared -- NHE Normal hydrogen electrode -- 1D One-dimensional -- OWS Overall water splitting -- OER Oxygen evolution reaction -- PEC Photoelectrochemical -- PL Photoluminescence -- PRET Plasmon resonance energy transfer -- RhB Rhodamine B -- rpm Rotations per minute -- Ms Saturation magnetization value -- SEM Scanning electron microscope -- SHE Standard hydrogen electrode -- O22− Superoxide radicals -- SPR Surface plasmon resonance -- TC Tetracycline -- TG Thermogravimetric analysis -- 3D Three-dimensional -- TA Transient absorption -- 2D Two-dimensional -- UV-vis Ultraviolet visible spectroscopy -- UVRS UV-vis reflectance spectroscopy -- VB Valence band -- WS Water splitting -- XPS X-ray photoelectron spectroscopy -- 0D Zero-dimensional; CuWO4 photocatalyst -- Fabrication and morphological aspects -- Enhancement strategies -- Hydrogen production -- Pollutant degradation; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2020.104230
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: Highlights: Potential of CuWO4 as a photocatalyst is explored. Various strategies to enhance photocatalytic performance are discussed. Photocatalytic applications of CuWO4 are summarized. Current challenges and potential solutions for future research are proposed. Abstract: Recently, photocatalysis has attracted all-embracing attention as a sustainable and green approach owing to its promising applications in the deterioration of contaminants along with the transformation of solar energy into chemical energy. An efficient visible-light harnessing Copper tungstate photocatalyst has hooked excellent performance because of its peculiar features, including eco-friendliness, low cost, optimum band edge potentials, as well as stability under oxidative and acidic conditions. However, any review depicting the correlation between different morphologies, properties, and performance of CuWO4 is still absent. Therefore, this review highlighted the energy applications of CuWO4 photocatalyst, focusing on its morphological dimensions and strategies for photocatalytic performance enhancement. Various fabrication methods, such as hydrothermal, electrodeposition, spray-pyrolysis, co-precipitation, sonochemistry, and solid-state synthesis, are also discussed. Controllable synthesis of distinct morphological nanostructures with the effect of parameters like temperature, pH, solvent, reaction time, and concentration of precursors has been briefly summarized. Nano-structured CuWO4 was explored to show high photocatalytic activity than pristine CuWO4 . Moreover, different revamp strategies, including doping of parent photocatalyst, loading of co-catalyst on photocatalyst surface, and heterojunction construction, are assumed for the efficient space charge isolation of photo charge carriers suppressing the rapid recombination of photo-generated electron-hole pairs for dynamic photocatalytic activity. The applications of CuWO4, including photocatalytic water reduction for H2 generation, photodegradation of dyes and antibiotics, and photoelectrochemical water splitting, have been highlighted. Finally, a brief, conclusive remark regarding present studies and unresolved challenges of nano-structured CuWO4 are put forth for future perspectives.