TpBD COF@ZnIn2S4 nanosheets: A novel S-scheme heterojunction with enhanced photoreactivity for hydrogen production

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2023-08-05 DOI:10.1016/j.apcatb.2023.122624

Shutong Bao , Qiuyan Tan , Shaodan Wang , Jie Guo , Kangle Lv , Sónia A.C. Carabineiro , Lili Wen

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引用次数: 15

Abstract

Covalent-organic frameworks (COFs) are emerging photocatalysts with porous structures and excellent light-harvesting abilities. However, their photoreactivity still needs further improvement before they can be used in practical applications. Herein, we report, for the first time, on the construction of a heterojunction consisting of core-shell structured 1,3,5-triformylphloroglucinol (Tp) and 4,4′-biphenylenediamine (BD) COF at ZnIn₂S₄ (ZIS) nanosheets, using a microwave-hydrothermal method. The best performing sample, TpBD COF@ZIS-10 (with a ZIS:TpBD COF mass ratio of 10:1), in the absence of a co-catalyst, achieves a visible-light-driven H₂ production rate of 2304 μmol g⁻¹ h⁻¹ with an AQE of 5.02% at 420 nm, and exhibits excellent stability. The improved photocatalytic performance of TpBD COF@ZIS was attributed to the strong interaction at the interface and the S-scheme charge transfer mechanism, which not only stimulates efficient charge separation and migration, suppressing recombination, but also preserves the higher redox potentials of photo-generated electrons and holes.

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TpBD COF@ZnIn2S4纳米片:一种具有增强光反应性的新型s型异质结用于制氢

共价有机框架(COFs)是一种新型的光催化剂，具有多孔结构和优异的光捕获能力。然而，在实际应用之前，它们的光反应性还需要进一步提高。本文首次报道了利用微波水热法在ZnIn2S4 (ZIS)纳米片上构建由核壳结构的1,3,5-三甲酰基间苯三酚(Tp)和4,4 ' -联苯二胺(BD) COF组成的异质结。在无助催化剂的情况下，最佳样品TpBD COF@ZIS-10 (ZIS:TpBD COF质量比为10:1)在420 nm处的可见光催化制氢速率为2304 μmol g−1 h−1,AQE为5.02%，并表现出良好的稳定性。TpBD COF@ZIS光催化性能的提高是由于界面处的强相互作用和S-scheme电荷转移机制，这不仅刺激了有效的电荷分离和迁移，抑制了复合，而且保留了光生电子和空穴的高氧化还原电位。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.