SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 64 ›› Issue (12): 76-86.DOI: 10.1016/j.cjche.2023.06.018

• Full Length Article • 上一篇    下一篇

In situ growth of cobalt on ultrathin Ti3C2Tx as an efficient cocatalyst of g-C3N4 for enhanced photocatalytic CO2 reduction

Tongming Su1, Jundong Meng1, Ya Xiao1, Liuyun Chen1, Hongbing Ji1,2, Zuzeng Qin1   

  1. 1. School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China;
    2. Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
  • 收稿日期:2023-02-28 修回日期:2023-05-15 出版日期:2023-12-28 发布日期:2024-02-05
  • 通讯作者: Tongming Su,E-mail:sutm@gxu.edu.cn;Zuzeng Qin,E-mail:qinzuzeng@gxu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22208065), Guangxi Natural Science Foundation (2022GXNSFBA035483, 2020GXNSFDA297007), Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology (2021K009, 2020K002), and Special funding for ‘Guangxi Bagui Scholars’.

In situ growth of cobalt on ultrathin Ti3C2Tx as an efficient cocatalyst of g-C3N4 for enhanced photocatalytic CO2 reduction

Tongming Su1, Jundong Meng1, Ya Xiao1, Liuyun Chen1, Hongbing Ji1,2, Zuzeng Qin1   

  1. 1. School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China;
    2. Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2023-02-28 Revised:2023-05-15 Online:2023-12-28 Published:2024-02-05
  • Contact: Tongming Su,E-mail:sutm@gxu.edu.cn;Zuzeng Qin,E-mail:qinzuzeng@gxu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22208065), Guangxi Natural Science Foundation (2022GXNSFBA035483, 2020GXNSFDA297007), Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology (2021K009, 2020K002), and Special funding for ‘Guangxi Bagui Scholars’.

摘要: Photocatalytic CO2 reduction to valuable product exhibit promising prospect for solving the energy crisis and the greenhouse effect. Herein, Co-Ti3C2Tx/g-C3N4 (Co-TC/CN) composite with enhanced photocatalytic performance for converting CO2 to CO and CH4 was constructed by electrostatic self-assembly method. The close contact interface between Co-Ti3C2Tx and g-C3N4 nanosheets can be used as fast transport channels of photogenerated electrons and effectively promote the separation of photogenerated electrons and holes, and the interface between the Co and Ti3C2Tx might be the active sites for CO2 adsorption and activation. The optimized Co-Ti3C2Tx/g-C3N4 composite exhibited the highest photocatalytic performance with the CO and CH4 production of 55.04 μmol·g-1 and 2.29 μmol·g-1, respectively, which were 7.5 times and 5.8 times than those of g-C3N4. Furthermore, the stability of g-C3N4 was improved after coupling with Co-Ti3C2Tx.

关键词: g-C3N4, MXene, Cobalt, Photocatalytic, CO2 reduction

Abstract: Photocatalytic CO2 reduction to valuable product exhibit promising prospect for solving the energy crisis and the greenhouse effect. Herein, Co-Ti3C2Tx/g-C3N4 (Co-TC/CN) composite with enhanced photocatalytic performance for converting CO2 to CO and CH4 was constructed by electrostatic self-assembly method. The close contact interface between Co-Ti3C2Tx and g-C3N4 nanosheets can be used as fast transport channels of photogenerated electrons and effectively promote the separation of photogenerated electrons and holes, and the interface between the Co and Ti3C2Tx might be the active sites for CO2 adsorption and activation. The optimized Co-Ti3C2Tx/g-C3N4 composite exhibited the highest photocatalytic performance with the CO and CH4 production of 55.04 μmol·g-1 and 2.29 μmol·g-1, respectively, which were 7.5 times and 5.8 times than those of g-C3N4. Furthermore, the stability of g-C3N4 was improved after coupling with Co-Ti3C2Tx.

Key words: g-C3N4, MXene, Cobalt, Photocatalytic, CO2 reduction