Metal–organic frameworks (MOFs) materials have aroused growing attention in the domain of photocatalysis owing to their unique properties, especially in the removal of contaminants. Herein, a novel carbon quantum dots (CQDs)-decorated MOF (ZIF-8) composite with excellent photocatalytic activity was prepared by a facile impregnation approach. The well-designed core–shell structure endows the composite with a remarkable absorptive capability and enhanced visible light response. CQDs@ZIF-8 composite exhibited superior photocatalytic removal efficiency of methylene blue, and the reaction rate constant was 6 times that of ZIF-8. The enhancement of the photocatalytic efficiency was attributed to the highly effective separation and transport of photo-induced charge, abundant reactive sites, and improved visible light response ability. Meanwhile, the CQDs@ZIF-8 photocatalyst possesses dependable structural and capability stability in the reuse of pollutant removal. This study would offer an underlying insight into the innovative design of high performance photocatalyst in environmental remediation.

中文翻译：

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具有增强光催化活性的新型核壳CQDs@ZIF-8复合材料的制备

金属有机框架（MOFs）材料由于其独特的性能，尤其是在去除污染物方面的特性，在光催化领域引起了越来越多的关注。在此，通过简便的浸渍方法制备了具有优异光催化活性的新型碳量子点（CQDs）修饰的 MOF（ZIF-8）复合材料。精心设计的核壳结构赋予复合材料卓越的吸收能力和增强的可见光响应。CQDs@ZIF-8复合材料对亚甲蓝表现出优异的光催化去除效率，反应速率常数是ZIF-8的6倍。光催化效率的提高归因于光生电荷的高效分离和传输、丰富的反应位点和改善的可见光响应能力。同时，CQDs@ZIF-8光催化剂在污染物去除再利用方面具有可靠的结构和能力稳定性。这项研究将为环境修复中高性能光催化剂的创新设计提供潜在的见解。