Construction of Y‐Doped BiVO₄ Photocatalysts for Efficient Two‐Electron O₂ Reduction to H₂O₂

Abstract

Photocatalytic hydrogen peroxide (H 2 O 2 ) production on BiVO 4 photocatalysts using water and oxygen as raw materials is a green and sustainable process. However, the photocatalytic efficiency of pristine BiVO 4 is limited by severe charge recombination. In this work, rare earth element Yttrium (Y) doped BiVO 4 photocatalysts were fabricated by the hydrothermal method. In the photocatalytic H 2 O 2 production experiment, the optimized Y-doped BiVO 4 photocatalyst produced 114 μmol g À 1 h À 1 of H 2 O 2 under simulated sunlight (AM1.5) irradiation, which is four times higher than production activity of pure BiVO 4 (26 μmol g À 1 h À 1 ). Density functional theory (DFT) calculation revealed that Y doping can enhance oxygen adsorption on the BiVO 4 photocatalyst surface. Mechanistic investigations suggest that the doping process induces the in situ formation of monoclinic/tetragonal BiVO 4 heterojunction, which further promotes the photogenerated carriers separation efficiency.

Experimental Study on the Impermeability and Micromechanisms of Basalt Fiber-Reinforced Soil-Cement in Marine Environments

“…The plasticity index Ip of the soil mass was 21.72, the natural water content was 57.5% and the porosity was 1.72. According to the Standard for Geotechnical Engineering Investigation (DBJ/T 13-84-2022) [40], the soil sample was judged as silt, and the fluidity index was 1.43. Therefore, the soil mass was judged as fluid plastic.…”

Construction of Ternary Bismuth‐Based Heterojunction by Using (BiO)2CO3 as Electron Bridge for Highly Efficient Degradation of Phenol

“…[9] Amongst the various photocatalysts, Bi-based semiconductors have shown superior photocatalytic properties due to its low cost, suitable band gap, and unique layered structure. [10][11][12] Especially, Bi 2 MoO 6 (BMO), one of the simplest Aurivillius-type compounds, has been considered as a promising photocatalytic material and shown good photocatalytic activity owing to its suitable band gap (2.4 ~2.8 eV). [13] Unfortunately, the application of pristine Bi 2 MoO 6 is significantly restricted by a rapid photogenerated electron-hole pair recombination and slow charge transportation.…”