Ultrafast charge transfer in metal-free H₂O₂ photoproduction by anhydride modified g-C₃N₄

Xie, Ying1; Liu, Jingjing1; Wang, Guanxiong3; Hu, Qiushi2; Chen, Xihan2

2023-10-31

10.1039/d3cc03807f

CHEMICAL COMMUNICATIONS   Impact Factor & Quartile

1359-7345

1364-548X

As a low-cost, low toxicity and metal-free catalyst with strong light absorption, graphitic carbon nitride (g-C3N4)-based materials have gained wide attention for efficient H2O2 photocatalysis. However, further investigation regarding the charge transfer process and reaction mechanism of H2O2 photoproduction remains to be completed. In this work, bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride (BTDA) modified g-C3N4 is synthesized through a facile one-step dehydration process, and the H2O2 photoproduction could reach 22.5 mu mol within 8 hours. The proposed structure of g-BTDA is confirmed by FTIR, XPS and SEM studies. The transient absorption reveals a 20.88 ps charge transfer process caused by the electron withdrawing ability of the C=O group, and a 2-electron oxygen reduction pathway is proposed. Our work represents a new strategy for efficient H2O2 photoproduction using easily acquired materials with future application potential.

SCI

English

NI Journal Papers

Corresponding

Scientific Research Fund of the Education Department of Liaoning Province[L J 2020012] ; Shenzhen Science and Technology Innovation Commission["JCYJ20220818100212027","ZDSYS20220527171403009"] ; Fund of Shenzhen Municipal Central Government to Guide Local Science and Technology[2021Szvup084]

Chemistry

Chemistry, Multidisciplinary

WOS:001085174600001

ROYAL SOC CHEMISTRY

CHEMISTRY

Web of Science

1.Shenyang Univ Chem Technol, Coll Sci, Key Lab Rare Earth Chem & Applicat Liaoning Prov, Shenyang, Liaoning, Peoples R China
2.Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Dept Mech & Energy Engn, Shenzhen Key Lab Intelligent Robot & Flexible Mfg, Shenzhen, Guangdong, Peoples R China
3.Shenzhen Acad Aerosp Technol, Shenzhen, Guangdong, Peoples R China

Xie, Ying,Liu, Jingjing,Wang, Guanxiong,et al. Ultrafast charge transfer in metal-free H₂O₂ photoproduction by anhydride modified g-C₃N₄[J]. CHEMICAL COMMUNICATIONS,2023,59(87).

Xie, Ying,Liu, Jingjing,Wang, Guanxiong,Hu, Qiushi,&Chen, Xihan.(2023).Ultrafast charge transfer in metal-free H₂O₂ photoproduction by anhydride modified g-C₃N₄.CHEMICAL COMMUNICATIONS,59(87).

Xie, Ying,et al."Ultrafast charge transfer in metal-free H₂O₂ photoproduction by anhydride modified g-C₃N₄".CHEMICAL COMMUNICATIONS 59.87(2023).