X射线光电子能谱
电子转移
光催化
光致发光
异质结
氢键
化学
化学键
制氢
催化作用
氢
光化学
材料科学
物理化学
化学工程
分子
有机化学
工程类
光电子学
作者
Zhaobo Fan,Xin Guo,Zhiliang Jin,Xin Li,Youji Li
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-02-28
卷期号:38 (10): 3244-3256
被引量:86
标识
DOI:10.1021/acs.langmuir.1c03379
摘要
The construction of interfacial effects and chemical bonds between catalysts is one of the effective strategies to facilitate photogenerated electron transfer. A novel hollow cubic CoS is derived from Co-ZIF-9 and the S-C bond is successfully constructed between CoS and g-C3N4. The S-C bond acts as a bridge for electronic transmission, allowing the rapid transmission of photoelectron to hydrogen evolution active site in CoS. In addition, the results of electrochemical impedance spectroscopy and time-resolved photoluminescence spectroscopy show that the S-C bond acts as a bridge to quickly transfer photogenerated carriers in the composite material, and achieves the effect of high-efficiency hydrogen evolution. The hydrogen production of SgZ-45 reaches 9545 μmol·g-1 in 5 h, which is 53 and 12 times that of g-C3N4 and ZIF-9, respectively. The intrinsic mechanism of photoelectron transfer through S-C bonds can be further confirmed by density functional theory (DFT) calculations. This work provides new insights for building a chemical bond electron transfer bridge between MOF derivatives and nonmetallic photocatalytic materials.
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