Herein, we, for the first time, report the controllable syntheses of the snowflake-like Cu₂S architectures by using a template free, facile hydrothermal route, in which thiourea as the precursor of sulfur and EDA as the solvent. It is surprising that the Cu₂S snowflakes show a higher photocatalytic activity than the other samples (Cu₂S dendrites and sheets), has been mainly ascribed to its high light absorbance and BET area. Then the MoS₂ nanosheets (NSs) are uniformly distributed on the Cu₂S snowflake (SF) substrate, the obtained MoS₂ NS/Cu₂S SF composite manifests high specific surface area (60.512 m² g⁻¹) and large pore volume (0.148 cm³ g⁻¹), which are favorable for the efficient light capturing together with the rapid transfer of charge carriers. In comparison with the pure Cu₂S, the MoS₂ NS/Cu₂S SF composite exhibits much enhanced activity and long-term stability towards the photocatalytic degradation of organic dye pollutants and hydrogen production. The improved photocatalytic activity could be owed to two aspects, namely the enhanced light trapping and scattering ability benefited from large specific area of unique snowflake-like structural features and improved charge separation activity of heterojunction between MoS₂ and Cu₂S.

在这里，我们首次通过使用无模板，简便的水热途径报告了雪花状Cu ₂ S结构的可控制合成，其中硫脲为硫的前体，EDA为溶剂。令人惊讶的是，Cu ₂ S雪花显示出比其他样品（Cu ₂ S树枝状和片状）更高的光催化活性，这主要归因于其高吸光度和BET面积。然后将MoS ₂纳米片（NSs）均匀地分布在Cu ₂ S雪花（SF）基底上，所得的MoS ₂ NS / Cu ₂ S SF复合材料表现出较高的比表面积（60.512 m ²  g ^-1））和大孔体积（0.148 cm ³  g ^-1），有利于有效的光捕获以及电荷载流子的快速转移。与纯Cu ₂ S相比，MoS ₂ NS / Cu ₂ S SF复合材料对有机染料污染物的光催化降解和产氢表现出大大增强的活性和长期稳定性。改善的光催化活性可以归因于两个方面，即得益于大的比表面积独特的雪花状结构特征而增强的光捕获和散射能力以及改善的MoS ₂与Cu ₂ S之间异质结的电荷分离活性。