Two-dimensional (2D) ZnS-SnS₂ porous nanosheets are designed as clean and low cost photocatalysts for water splitting. The composites successfully combine high photoelectron reduction potential of ZnS with the sufficient sunlight harvesting ability of SnS₂. Moreover, SnS₂ acts as an effective electron transfer medium from ZnS to SnS₂ due to the construction of quasi-type II structure. This greatly promotes the transfer of electron-hole pairs and effectively inhibits their recombination. Especially, the unique porous nanosheets structure maintains them high specific surface area and countless reactive sites, which increases the reactants' contact area and facilitates the migration of carriers upon photocatalysis. This further supresses the charge recombination and improves the photocatalysts' stability. As a result, an optimized specific surface area of 246.7 m² g⁻¹ and photocatalytic H₂ generation rate of 536 μmol h⁻¹ g⁻¹ are achieved in the absence of a surfactant and co-catalyst, which is 10 times higher than ZnS and 17 times higher than SnS₂. In addition, the porous nanosheets have fairly good photocatalytic stability and can be reused at least five cycles without obvious changes in activity and structure. This work successfully presents the potential of ZnS and SnS₂-based photocatalyst for clean and low cost hydrogen production from water splitting.

二维（2D）ZnS-SnS ₂多孔纳米片被设计为用于水分解的清洁且低成本的光催化剂。该复合材料成功地将ZnS的高光电子还原潜力与足够的SnS _2的日光吸收能力结合在一起。此外，SnS ₂是从ZnS到SnS ₂的有效电子传输介质由于构造为准II型结构。这极大地促进了电子-空穴对的转移并有效地抑制了它们的复合。特别地，独特的多孔纳米片结构保持它们高的比表面积和无数的反应位点，这增加了反应物的接触面积并促进了载体在光催化下的迁移。这进一步抑制了电荷重组并改善了光催化剂的稳定性。结果，优化的比表面积为246.7 m ²  g ^-1，光催化H _2的生成速率为536μmolh ^-1 g ^-1在不存在表面活性剂和助催化剂的情况下可实现上述目的，所述表面活性剂和助催化剂比ZnS高10倍，比SnS ₂高17倍。另外，多孔纳米片具有相当好的光催化稳定性，并且可以在不明显改变活性和结构的情况下至少重复使用五个循环。这项工作成功地展示了基于ZnS和SnS ₂的光催化剂在水分解过程中生产清洁低成本氢气的潜力。