数字农科院2.0

Engineering BiOBr/TpBD-COF S-scheme heterointerface via phase transformation strategy for boosted photocatalytic hydrogen generation

文献类型： 外文期刊

作者： Ran, Huili;Liu, Xue;Fan, Jiajie;Yang, Yun;Zhang, Lijie;Guo, Qin;Zhu, Bicheng;Xu, Quanlong

作者机构：

关键词： Covalent organic frameworks;BiOBr/TpBD-COF;Phase transformation;S-Scheme heterojunction;Photocatalytic hydrogen generation

期刊名称： JOURNAL OF MATERIOMICS

ISSN： 2352-8478

年卷期： 2025 年 11 卷 3 期

页码：

收录情况： SCIE（2025版） ; ; CSCD（2025-2026年度）

摘要： The construction of heterojunction is an effective way to promote the photoinduced charge carrier separation in spatial, thus accelerating the photocatalytic reaction. However, the regulation of interface properties, as a crucial factor in affecting the charge carrier diffusion process, still remains a significant challenge. In this work, BiOBr/TpBD-COF heterojunction was successfully constructed via a novel phase transformation strategy. Specifically, perovskite Cs3Bi2Br9 was first synthesized and then in-situ transformed into BiOBr during the preparation of TpBD-COF procedure, thus obtaining BiOBr/TpBD-COF heterojunction with favorable interface. According to the in-situ X-ray photoelectron spectroscopy (XPS) characterization and electron paramagnetic resonance (EPR) analysis, the photogenerated electrons with weak reduction power transfer from BiOBr to TpBD-COF driven by the internal electric field under irradiation, conforming to S-scheme charge transfer mode. As a result, the photogenerated electrons and holes with strong redox abilities are spatially located on TpBD-COF and BiOBr surface, respectively, endowing the strong driving force toward the water splitting reaction. The optimized 10% BiOBr/TpBD-COF displayed remarkably enhanced photocatalytic hydrogen evolution rate (16.17 mmol center dot g-1 center dot h-1) in comparison with TpBD-COF (5.18 mmol center dot g-1 center dot h-1). This study will provide some novel inspirations for developing efficient COF-based S-scheme heterojunction photocatalysts. (c) 2024 The Authors. Published by Elsevier B.V. on behalf of The Chinese Ceramic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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