期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 297, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120414
关键词
BiVO4; Au; G-C3N4; H2O2; Photocatalysis
资金
- National Natural Science Foundation of China [51672203, 52073263]
- 111 Project
- Fundamental Research Funds for the Central Universities [WUT 2020-zy-027]
In this study, a BiVO4 single crystal with selective comodification of ultra-thin g-C3N4 and Au was prepared for the first time to improve H2O2 production efficiency, achieving excellent performance in H2O2 production.
Au/BiVO4 is a promising photocatalyst for H2O2 production owing to its appropriate energy-band structure and excellent two-electron O2 reduction ability. However, easy H2O2 decomposition by photogenerated holes limits its high-efficient H2O2 production. To alleviate the issue, in the study, BiVO4 single crystal with selective comodification of ultra-thin g-C3N4 and Au was prepared for the first time. Specifically, ultra-thin g-C3N4 nanosheets are mainly modified on the (110) facet of BiVO4 to facilitate effective transfer of photogenerated holes and depress H2O2 decomposition, while Au is modified on its (010) facet to effectively catalyze the two-electron O2 reduction. Consequently, the photocatalyst presents excellent H2O2-production performance with 1.35 mmol L-1 in 2 h which is 2.65-fold compared with that for Au/BiVO4, and shows the best performance in the literatures related with BiVO4 based photocatalysts for H2O2 production. The present strategy provides a new insight into the design of highly efficient photocatalysts for H2O2 production.
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