Issue 95, 2023

Oxygen vacancy-promoted photocatalytic H2O2 production over bismuth oxybromide nanosheets

Abstract

Hydrogen peroxide (H2O2) is an essential and versatile oxidant. The photocatalytic production of H2O2 is a promising alternative to the conventional anthraquinone oxidation process. In this work, BiOBr nanosheets with oxygen vacancies (OVs) were successfully synthesized by a solvothermal method in the presence of mannitol. The character of the nanosheets shortened the diffuse length of charge carriers, which is beneficial for the charge separation. The introduction of OVs enhanced the visible light absorption and also improved the carrier separation. Furthermore, OVs enhanced the activation of O2 molecules and facilitated the generation of ˙O2. As a result, the products exhibited good performance in photocatalytic H2O2 production. After introducing HCOOH, the yield of H2O2 was further enhanced by a factor of 50, from 3 μmol h−1 to 150 μmol h−1. This work provides a reference to design high performance photocatalysts for H2O2 production through defect engineering.

Graphical abstract: Oxygen vacancy-promoted photocatalytic H2O2 production over bismuth oxybromide nanosheets

Supplementary files

Article information

Article type
Communication
Submitted
24 Aug 2023
Accepted
03 Nov 2023
First published
03 Nov 2023

Chem. Commun., 2023,59, 14142-14145

Oxygen vacancy-promoted photocatalytic H2O2 production over bismuth oxybromide nanosheets

H. Chu, R. Li, D. Zeng, W. Wang, B. Cui, T. Jia, L. Zhang and W. Wang, Chem. Commun., 2023, 59, 14142 DOI: 10.1039/D3CC04127A

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