光催化
异质结
材料科学
化学工程
半导体
催化作用
紫外线
纳米技术
光电子学
化学
有机化学
工程类
作者
Mengyang Xu,Chao Sun,Xiaoxue Zhao,Hanqiu Jiang,Huiqin Wang,Pengwei Huo
标识
DOI:10.1016/j.apsusc.2021.151792
摘要
Fabricating the hierarchical heterostructure is efficient way for enhancing CO2 conversion of semiconductor photocatalysts. Herein, a simple strategy has been employed to prepare several 3D hierarchical CdS/Ni-MOF heterostructure photocatalysts, and the selective photoreduction of CO2 to CO under simulated sunlight in the gas–solid phase reactor. Among the prepared photocatalysts, 20%-CdS/Ni-MOF shows the best CO yield, which was 16 times and 7 times that of Ni-MOF and CdS, respectively. By controlling the morphology of the catalyst, we found that the significant improvement in photocatalytic activity can be ascribed to the synergistic effect of heterostructure in CdS/Ni-MOF and its unique hierarchical structure, which can improve the efficiency of charge transmission and provides abundant active sites, etc. Finally, the preliminary photocatalytic mechanism was discussed by in situ FTIR and liquid ultraviolet spectrophotometer.
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