Mild and direct conversion of methane into high value-added products is a desired goal for chemistry, energy, and environment. The active species generated in the photocatalytic reaction system under mild conditions activate the inert C–H bond in methane and promote methane conversion. This review focuses on the developed mechanisms for C(sp³)–H bond activation in photocatalytic methane conversion, including radical and active site mechanisms. Particular emphasis is placed on the detailed summary of mechanism, characterization method, and corresponding application in photocatalytic methane conversion. We also discuss the challenges and prospects for future direction on C(sp³)–H bond activation mechanism in photocatalytic methane conversion. This review aims to promote the development of photocatalytic methane conversion and provides guidance for the design of high-efficiency photocatalysts.

将甲烷温和而直接地转化为高附加值产品是化学、能源和环境的理想目标。在温和条件下，光催化反应体系中产生的活性物质会激活甲烷中的惰性 C-H 键，促进甲烷转化。本综述重点介绍了光催化甲烷转化中C(sp ^{3 )-H 键活化的发展机制，包括自由基和活性位点机制。}特别强调了光催化甲烷转化的机理、表征方法和相应应用的详细总结。^{我们还讨论了 C(sp 3} ) 未来方向的挑战和前景)–光催化甲烷转化中的H键活化机制。本综述旨在促进光催化甲烷转化的发展，为高效光催化剂的设计提供指导。