Tao Zhou, Junzi Li, Xu Han, Yingyu Song, Menglong Liu, Jialiang Liu, Wen-Wen He, Thamraa AlShahrani, Shengqian Ma
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引用次数: 0
摘要
异质结工程被认为是提高光催化剂析氢性能的有效手段之一。本研究将双金属MOF-74生长在空心Cu7S4上，硫化后得到h - cu /NiS2@CuS形成异质结构。实验结果表明，合成的h - cu /NiS2@CuS具有出色的光催化析氢速率，为17.66 mmol g−1 h−1，其光催化析氢性能远高于单一过渡金属硫化物。在s型异质结中，界面电场导致NiS2导带上光电子的显著积累。从而在析氢反应中保持较高的还原性，显著提高光电子与空穴的分离效率。本研究为合成高效异质结光催化剂提供了一种可行的方案。
Construction of Hollow H-CuS/NiS2@CuS S-Scheme Heterostructure Photocatalyst with an Excellent Hydrogen Evolution Performance
Heterojunction engineering is regarded as one of the most efficacious means to enhance the hydrogen evolution performance of photocatalysts. In this research, bimetal MOF-74 is grown on hollow Cu7S4, and after vulcanization, H-CuS/NiS2@CuS is obtained to form heterostructures. The experimental results indicate that the synthesized H-CuS/NiS2@CuS has an outstanding photocatalytic hydrogen evolution rate of 17.66 mmol g−1 h−1, and its photocatalytic hydrogen evolution performance is much higher than that of single transition metal sulfide. Within the S-scheme heterojunction, the interfacial electric field causes a significant accumulation of photoelectrons on the conduction band of NiS2. Thus, it can maintain a high reducing property in the hydrogen evolution reaction and remarkably boosts the separation efficiency of photoelectrons and holes. This research offers a feasible scheme for the synthesis of highly efficient heterojunction photocatalysts.
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