Bridging Effect of S-C Bond for Boosting Electron Transfer over Cubic Hollow CoS/g-C3N4 Heterojunction toward Photocatalytic Hydrogen Production

Zhaobo Fan; Xin Guo; Zhiliang Jin; Xin Li; Youji Li

doi:10.1021/acs.langmuir.1c03379

Bridging Effect of S-C Bond for Boosting Electron Transfer over Cubic Hollow CoS/g-C₃N₄ Heterojunction toward Photocatalytic Hydrogen Production

Langmuir. 2022 Mar 15;38(10):3244-3256. doi: 10.1021/acs.langmuir.1c03379. Epub 2022 Feb 28.

Authors

Zhaobo Fan¹, Xin Guo¹, Zhiliang Jin¹, Xin Li², Youji Li³

Affiliations

¹ School of Chemistry and Chemical Engineering, Ningxia Key Laboratory of Solar Chemical Conversion Technology, Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan 750021, PR China.
² Institute of Biomass Engineering, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, PR China.
³ College of Chemistry and Chemical Engineering, Jishou University, Jishou, Hunan 416000, PR China.

PMID: 35225625
DOI: 10.1021/acs.langmuir.1c03379

Abstract

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.