Metal-organic frameworks (MOF_s) are self-assembled molecular containers that can encapsulate and stabilize short-lived reaction intermediates. In this study, the Cu-benzene-1,3,5-tricarboxylate (BTC) MOF was incorporated in a ZnO/graphene oxide (GO) photocatalytic system by electrostatic interaction, and the obtained assembly showed improved hydrogen evolution activity. Electron spin resonance analysis was used to detect and monitor free radicals in the photocatalytic system, and demonstrated that Cu-BTC MOF could stabilize and extend the lifetime of free radicals, increasing the chance of H· radical recombination to form H₂. This work provides a new strategy for designing highly efficient photocatalysts.

中文翻译：

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Cu-BTC MOF与ZnO / GO的静电相互作用改善H自由基稳定的光催化H 2析出

金属有机骨架（MOF _s）是自组装的分子容器，可以封装和稳定短寿命的反应中间体。在这项研究中，Cu-苯-1,3,5-三羧酸酯（BTC）MOF通过静电相互作用被引入到ZnO /氧化石墨烯（GO）光催化体系中，并且获得的组件显示出改善的析氢活性。电子自旋共振分析用于检测和监测光催化体系中的自由基，并证明Cu-BTC MOF可以稳定并延长自由基的寿命，从而增加了H·自由基重组形成H ₂的机会。这项工作为设计高效的光催化剂提供了新的策略。