The effect of crystal facets and induced porosity on the performance of monoclinic BiVO4 for the enhanced visible-light driven photocatalytic abatement of methylene blue

Systematic Assessment of Visible-Light-Driven Microspherical V2O5 Photocatalyst for the Removal of Hazardous Organosulfur Compounds from Diesel

“…Figure 6 represents the visible-light-simulated generation of electron-hole pairs inside the V 2 O 5 photocatalysts, and the comprehensive route for the photocatalytic desulfurization process is provided. The light photons absorbing on the photocatalyst surface, having energy greater than the bandgap to the semiconductor material, will excite the electrons from the valence band to the conduction band of the semiconductor and yield •O 2 − by reacting with the molecular oxygen [22]. The usage of air bubbling from the reaction solution provides an electron trap, preventing the recombination of electron-hole pairs [43].…”

“…Many photocatalytic materials have been reported for photocatalytic desulfurization applications, including ZnO, TiO 2 , CeO 2 , and WO 3 . Nevertheless, the activity of these materials upon a limited range of light irradiations affects their broader photocatalytic applicability [21][22][23][24]. Recently, vanadium pentoxide (V 2 O 5 ) has received significant attention as a visible-light-driven photocatalytic material, owing to its slim bandgap energy of 2.40 eV, lower cost, and the two-dimensional layered structure [25].…”

Crystal facet effect of tin dioxide nanocrystals on photocatalytic degradation and photo-assisted gas sensing properties

“…3,8 Most of the studies have shown that anatase TiO 2 crystal facets with high surface energy (such as {001}, {110}, {100}, {111}, and {116} facets) have better photocatalytic activity than those with low surface energy (such as {101} facets), 3,9–12 although there were also some studies suggesting that the co-exposure of high surface energy facets and low surface energy facets could form a facet-junction, which exhibited a significantly enhanced carrier separation efficiency and thus improved photocatalytic performance compared with single crystal facets. 13 With in-depth research, this kind of crystal facet dependent photocatalytic performance has been gradually extended to more and more material systems, including ZnO, 14 BiOCl, 15 BiVO 4 , 16 and Ag 3 PO 4 . 17 In the field of gas sensing, it has been also shown that the crystal facets of metal oxide nanomaterials with higher surface energy often had more dangling bonds and could introduce more effective adsorption sites for target gases, which resulted in better gas sensing activities.…”

Catalytic Photodegradation of Cyclic Sulfur Compounds in a Model Fuel Using a Bench-scale Falling-film Reactor Irradiated by a Visible Light

“…Doping TiO2 with transition metals, such as Cu, Cr, Fe, etc. [15,16], and nonmetals, such as C, N, and S [17], was attempted. Mittal et al [18] reported that doping semiconductors with non-metals is a promising, efficient, and economic technique to utilize visible light to degrade organic pollutants.…”