Oxygen Vacancy-Engineered S-Scheme Heterojunction of BiVO₄@Type II Red Phosphorus for Efficient Photocatalytic Hydrogen Evolution via Pure Water Splitting.

Authors

Wenjie Yan, Zipu Wang, Xuan Dong, Hongwen Zhang, Ivan Shanenkov, Junzhi Li, Hao Tan, Lijie Zhang, Hua Tang, Yukun Zhu

Published in

Small (Weinheim an der Bergstrasse, Germany). Pages e75131. Aug 12, 2026. Epub Aug 12, 2026.

Abstract

Solar-driven photocatalytic hydrogen production utilizing S-scheme heterojunctions holds great potential due to their capacity for spatial carrier separation and maintaining a high redox potential. In this work, an S-scheme heterojunction consisting of oxygen vacancy (V_O)-enriched BiVO₄@Type II red phosphorus (BiVO₄@RP) was synthesized by a facile ball-milling approach, resulting in Type II RP nanosheets enwrapping the surface of decahedral BiVO₄. The introduction of V_O in BiVO₄ induces defect electronic states that serve as effective trapping sites for photogenerated electrons at the heterojunction interface. Consequently, the synergistic effect of V_O in BiVO₄ and intimate interfacial contact between BiVO₄ and RP facilitate the migration of photo-electrons through an S-scheme transfer route, thereby enhancing the hydrogen production activity from pure water splitting. Remarkably, the optimized BiVO₄@RP composite achieves a hydrogen evolution rate of 518.5 µmol·h^-1·g^-1 under simulated solar light irradiation. This study may provide valuable insights into the design of defect-modulated S-scheme heterojunction photocatalysts for efficient artificial photosynthesis.

PMID:
42581681
Bibliographic data and abstract were imported from PubMed on 12 Aug 2026.

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