Substitution of Ce^(III,IV) ions for Bi in BiVO₄ and its enhanced impact on visible light-driven photocatalytic activities

Abstract

The recombination of photogenerated charges can be greatly depressed by the charged crystal defects in the Bi1−xCexVO4+δ novel solid solution photocatalyst and both ˙OH and ˙O2− could be detected in the photoreaction.

Co2+ substituted for Bi3+ in BiVO4 and its enhanced photocatalytic activity under visible LED light irradiation

“…31,32 The crystallite size (d, nm) of Bi 1Àx Co x VO 4+d samples were evaluated from {121} peak of XRD patterns using the Scherrer's equation. 14,30 The d values of the Bi 1Àx Co x VO 4+d samples are presented in Table 1. As shown in Table 1, the crystallite size of Co-doped BiVO 4 slightly increased compared to that of bare BiVO 4 sample, implying that the presence of Co 2+ could inuence the formation of crystalline particles of BiVO 4 .…”

“…5B. 13,30,40,41 The E g values of the Bi 1Àx Co x VO 4+d samples are presented in Table 1. Accordingly, the E g appeared to be slightly declining with increasing Co molar ratio.…”

High Photocatalytic Performance of Pd/PdO‐Supported BiVO4 Nanoparticles for Rhodamine B Degradation under Visible LED Light Irradiation

“…In Figure 4 C, the V2p orbital exhibited splitting peaks at 516.80 and 522.65 eV, corresponding to the characteristic spin‐orbit split of V2p 1/2 and V2p 3/2 signals . These outcomes indicated that chemical states of Bi and V were 3+ and 5+, respectively . The O 1s spectra (Figure 4 C) of 0.5%‐Pd‐BVO samples at a binding energy (BE) of 529.7 eV could be deconvoluted into three pairs of individual components referring to the surface lattice oxygen (529.69 eV), the surface adsorbed oxygen species (530.62 eV), and water (531.96 eV) .…”

“…The photocatalytic efficiency of this material, however, is not as expected because of the recombination of the electron/hole (e – /h + ) pairs, which was caused by its weak surface adsorption and poor charge transport characteristics . Attempts to enhance the photocatalytic performance of BiVO 4 through restricting the recombination of the electron/hole (e – /h + ) pairs included the design of composites containing BiVO 4 , decoration of BiVO 4 by metals/oxides, the synthesis of BiVO 4 with surface Bi or O vacancy, and the fabrication of BiVO 4 with monoclinic‐tetragonal heterostructure ,. Among them, decoration of BiVO 4 by noble metals/oxides have been widely investigated.…”

Unraveling the impact of the Pd nanoparticle@BiVO4/S-CN heterostructure on the photo-physical & opto-electronic properties for enhanced catalytic activity in water splitting and one-pot three-step tandem reaction

“…[38][39][40] Thus, to overcome these limitations and improve its quantum efficiency for OER application, various concepts have implemented. [41][42][43][44][45] Among them, the formation of heterostructures seems to be one of the most promising strategies. Using this strategy, the separation of charge carriers is maximized at the interface of two materials through carrier mobility alteration.…”