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Exploring the effects of doping on the photocatalysis by transition metal tungstates
Session: General Catalysis:
Transition metal tungstates are promising low-cost semiconductor nanomaterials that are photocatalytically active. CoWO4, NiWO4, CuWO4, and ZnWO4 were synthesized under similar conditions and characterized by dynamic light scattering, transmission electron microscopy, X-ray diffraction, and X-ray fluorescence. Photocatalytic performance was tested in photodegradation of methylene blue in water at 375±5 nm. The rates of the photodegradation of the dye were quantified via UV-visible spectroscopy. Introduction of low or high concentrations of dopants affects the electronic structure of the semiconductors and photodegradation rate. We also show band structures calculated within VASP to investigate the electronic effects of doping and the nature of the valence band edge and conductance band edge. Calculations were performed under the PBEsol+U framework to reproduce the expected band structure with single point HSE06 calculations to validate our results when possible.
UV-Vis time series of methylene blue photodegradation
Density of States of NiCo(WO4) 2 calculated within PBEsol+U
Iridium oxides have been considered as a benchmark catalyst exhibiting high activity, albeit a modest stability, for the oxygen evolution reaction (OER) in acidic media…
Iridium oxides have been considered as a benchmark catalyst exhibiting high activity, albeit a modest stability, for the oxygen evolution reaction (OER) in acidic media…
Bimetallic solid catalysts catalyze selective oxidative alcohol-alcohol and alcohol-amine coupling; in particular, those with group 10 and 11 transition metals (M; e.g., silver or palladium) as minor components in gold or copper hosts. A series of bimetallic M-Au and M-Cu catalysts (i.e…