Abstract: The principle of artificial semiconductor Z-scheme and recent advance in its catalysts for photocatalytic water splitting for hydrogen production are reviewed，including photosystem I catalysts (PS1[H2])，photosystem II catalysts (PS2[O2]) and their mediators. Their effects in Z-scheme photocatalysis and mechanism of electron transfer of PS1[H2]，PS2[O2] and their mediators are illustrated. A comparison of photo conversion efficiency among some of the reported Z-scheme systems is made. Future research on Z-scheme systems should be focused on the mechanism of electron transfer of Z-scheme systems without mediators，synthesis of non-noble metal co-catalysts and applications in photocatalytic reduction of carbon dioxide and photoelectrochemistry.

Key words: Z-scheme, photochemistry, photo conversion efficiency, hydrogen production, solar energy

摘要： 通过介绍人工半导体Z反应的原理，综述该类型反应体系，包括模拟PSI催化剂（PS1[H2]）、模拟PSII催化剂（PS2[O2]）和介体（mediator） 应用于人工模拟光解水制氢的研究进展，重点阐述此三者在Z反应中所起的作用及其电子传递机理的发展现状，并通过估算不同介体的光能转换效率比较各反应系统的优缺点，指出无介体Z反应系统的电子传递机理、非贵金属助剂的制备、在光催化还原二氧化碳和光电催化中的应用是未来Z反应研究的重点。

关键词: Z反应, 光化学, 光能转换效率, 制氢, 太阳能