Metal–organic frameworks (MOFs) are a new type of porous crystal materials that have been widely used in various fields. Owing to their adjustable porous structure, MOF photocatalysts with high catalytic activity have become a research hotspot. In this study, NH2-MIL-125/CoSx samples were investigated as a novel visible light-responsive catalyst for the removal of organic dye. The NH2-MIL-125/CoSx-20 composites showed the best photodegradation efficiency, where photodegradation of the rhodamine B reached 95.4% in 45 min. CoSx was able to effectively extend the wavelength absorption range of NH2-MIL-125 and effectively separate the photogenerated electrons and holes and that could lead to the improved photocatalytic performance of the composites. The reactive superoxide radical (·O2−) was identified as the main active species using reactive species capture experiments, and a reasonable photocatalytic mechanism was proposed. This paper is intended to guide the development of organic–inorganic hybrid materials for environmental remediation.

中文翻译：

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一种新型无定形CoSx/NH2-MIL-125复合材料在可见光下光催化降解罗丹明B

金属有机骨架材料（MOFs）是一种新型的多孔晶体材料，已广泛应用于各个领域。由于其多孔结构可调，具有高催化活性的MOF光催化剂已成为研究热点。在这项研究中，NH2-MIL-125/CoSx 样品被研究为一种新型的可见光响应催化剂，用于去除有机染料。NH2-MIL-125/CoSx-20 复合材料表现出最好的光降解效率，其中罗丹明 B 的光降解在 45 分钟内达到 95.4%。CoSx 能够有效扩展 NH2-MIL-125 的波长吸收范围，有效分离光生电子和空穴，从而提高复合材料的光催化性能。通过活性物种捕获实验确定活性超氧自由基(·O2-)为主要活性物种，并提出了合理的光催化机理。本文旨在指导开发用于环境修复的有机-无机杂化材料。