Harvesting solar energy to drive highly efficient photocatalytic conversion of renewable biomass and its derivatives to value-added chemicals with the concomitant formation of hydrogen (H₂) is a green and promising strategy to cope with the global energy dilemma. In this context, we have reported the facile assembly of uniformly distributed CdS nanoparticles (NPs) on the two-dimensional (2D) platform of Ti₃C₂T_x MXene nanosheets (NSs) via a low-temperature wet chemistry process, during which tight interfacial contact between CdS and Ti₃C₂T_x has been realized. The Ti₃C₂T_x/CdS composites feature remarkable enhancement in the aqueous-phase photoredox conversion of furfural alcohol to furfural and H₂ by simultaneously utilizing photoexcited holes and electrons. Mechanistic studies reveal that the Ti₃C₂T_x MXene acts as an “electron sink” to capture the electrons generated from CdS and the close interfacial connection expedites the separation and transport of photoexcited charge carriers, thereby accelerating the photocatalytic performance of the Ti₃C₂T_x/CdS composites. We anticipate that this work would provide an instructive paradigm for further rational design of MXene/semiconductor hybrids for photoredox-catalyzed production of value-added products and H₂ from biomass intermediates.

中文翻译：

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Ti3C2Tx / CdS复合材料上光氧化还原催化的生物质中间转化与H2生产的集成

收获太阳能以驱动可再生生物质及其衍生物高效光催化转化为增值化学品，同时形成氢（H ₂）是应对全球能源困境的绿色且有希望的战略。在这种情况下，我们已经报告了通过低温湿化学过程在Ti ₃ C ₂ T _x MXene纳米片（NSs）的二维（2D）平台上均匀分布的CdS纳米颗粒（NPs）的简便组装。CdS与Ti ₃ C ₂ T _x之间的紧密界面接触已经实现。Ti ₃ C ₂ T_x / CdS复合材料的特征在于，通过同时利用光激发的空穴和电子，糠醛醇向糠醛和H ₂的水相光氧化还原转化率显着提高。机理研究表明，Ti ₃ C ₂ T _x MXene充当“电子阱”以捕获CdS产生的电子，紧密的界面连接加快了光激发电荷载流子的分离和传输，从而加快了Ti ₃的光催化性能。C ₂ T _x/ CdS复合材料。我们预计这项工作将为进一步合理设计MXene /半导体杂化体提供指导性范例，以用于光氧化还原催化从生物质中间体生产增值产品和H ₂。