Two-dimensional (2D) materials, due to its excellent mechanical, unique electrical and optical properties, have become hot materials in the field of photocatalysis. Especially, 2D heterostructures can well inhibit the recombination of photogenerated electrons and holes in photocatalysis because of its special energy band structures and carrier transport characteristics, which are conducive to enhancing photoenergy conversion capacity and improving oxidation and reduction ability, so as to purify pollutants and store energy. In this minireview, we summarize recent theoretical progress in direct Z-scheme photocatalysis of 2D heterostructures, focusing on physical mechanism and improving catalytic efficiency. Current challenges and prospects for 2D direct Z-scheme photocatalysts are discussed as well.

二维（2D）材料由于其出色的机械性能，独特的电学和光学特性，已成为光催化领域的热门材料。特别是二维异质结构由于具有特殊的能带结构和载流子传输特性，可以很好地抑制光催化电子和空穴的复合，有利于增强光能转化能力，提高氧化还原能力，从而净化污染物并储存。活力。在此小型审查中，我们总结了二维异质结构在直接Z方案光催化中的最新理论进展，重点是物理机理和提高催化效率。还讨论了二维直接Z方案光催化剂的当前挑战和前景。