Zhang Hongdan, Xuan Yang, Cheng Peng, Ma Wenwen, Zhao Zhen, Liu Xiaoyang
Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, China.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, China.
Front Chem. 2020 Jan 24;8:15. doi: 10.3389/fchem.2020.00015. eCollection 2020.
The 14-pods CuS hollow microcages wholly exposed with nanotwinned building blocks were successfully prepared by an ethanol-assisted sacrificial CuO template approach. Its photocatalytic activity for the degradation of methylene blue (MB) was determined. The results suggest that the CuS microcages with nanotwinned building blocks possess higher catalytic activity than the CuS microcages without the nanotwinned structures, suggesting that the special nanotwinned components can improve the catalytic performance of the multipod framework. Further investigate reveals that the nanotwins inside the CuS microcages can facilite the transport of free charges, decrease the recombination of photoinduced electrons and holes, and elongate the lifetime of the electron-hole pairs. Our work will provide powerful evidence that the nanotwinned building blocks of the synthesized CuS microcages play a crucial role for the high catalytic activity.
通过乙醇辅助牺牲性CuO模板法成功制备了由纳米孪晶结构单元完全暴露的14面体CuS空心微笼。测定了其对亚甲基蓝（MB）降解的光催化活性。结果表明，具有纳米孪晶结构单元的CuS微笼比没有纳米孪晶结构的CuS微笼具有更高的催化活性，这表明特殊的纳米孪晶组分可以提高多面体框架的催化性能。进一步研究表明，CuS微笼内部的纳米孪晶可以促进自由电荷的传输，减少光生电子和空穴的复合，并延长电子-空穴对的寿命。我们的工作将提供有力证据，证明合成的CuS微笼的纳米孪晶结构单元对高催化活性起着关键作用。
