Monohydric alcohols, such as methanol, ethanol, are useful chemical building blocks that can be facilely produced from various carbon resources. The direct conversion of alcohols into high-value-added chemicals, in particular diols, is attractive but challenging. Photocatalysis has provided a promising strategy for direct coupling of alcohols to high-value-added chemicals. This article focuses on recent advances in photocatalytic C − C coupling of alcohols, including methanol, ethanol, isopropanol, aromatic alcohols, into diols, such as ethylene glycol, 2,3-butanediol, pinacol, hydrobenzoin. The photocatalysts, performances and reaction mechanisms are discussed for deep understanding of preferential activation of C − H bond of alcohols and C − C coupling to diols.

一元醇（例如甲醇，乙醇）是有用的化学结构单元，可以轻松地从各种碳资源中生产。醇直接转化成高附加值的化学物质，特别是二醇，是有吸引力的，但具有挑战性。光催化为将醇与高附加值化学物质直接偶联提供了一种有前途的策略。本文关注于将包括甲醇，乙醇，异丙醇，芳族醇在内的醇类光催化CC偶联成二醇（例如乙二醇，2,3-丁二醇，频哪醇，氢安息香）的最新进展。讨论了光催化剂，性能和反应机理，以深入了解醇的C-H键的优先活化和C-C与二醇的偶联。