数字农科院2.0

Construction of CYANO–COF/ZnIn2S4 S-scheme heterojunction for boosted photocatalytic hydrogen generation

文献类型： 外文期刊

作者： Huili Ran;Xue Liu;Langhuan Ye;Jiajie Fan;Bicheng Zhu;Quanlong Xu;Yuechang Wei

作者机构：

关键词： Covalent organic frameworks;Photocatalytic hydrogen generation;S-scheme heterojunction;ZnIn2S4

期刊名称： Journal of Materials Science and Technology

ISSN： 1005-0302

年卷期： 2025 年 234 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版） ; ; CSCD（2025-2026年度） ; ; 科技核心（2024版）

摘要： Covalent organic framework (COF)-based heterojunction has emerged as a promising photocatalyst toward solar-to-fuel conversion. However, achieving high charge carrier separation efficiency and superior photocatalytic performance still remain a significant challenge. Herein, CYANO–COF was integrated with ZnIn2S4 via a facile in-situ growth method, thus forming CYANO–COF/ZnIn2S4 heterojunction. According to the in-situ light irradiation X-ray photoelectron spectroscopy (XPS) characterization and theoretical calculation, CYANO–COF/ZnIn2S4 heterojunction was verified to adopt an S-scheme charge transfer mechanism capable of fast charge carrier transfer rate and strong redox ability. As a result, the optimized CYANO–COF/ZnIn2S4–7.5 % exhibited a superior photocatalytic hydrogen production rate of 129.1 mmol g−1 h−1, which was 3.9 and 56 times higher than that of pristine CYANO–COF (33.2 mmol g−1 h−1) and ZnIn2S4 (2.3 mmol g−1 h−1), respectively, and the apparent quantum efficiency (AQE) at 420 nm was 20.5 %. The study shed light on the great promising of COF-based organic/inorganic S-scheme heterojunction toward solar fuel generation.

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