J. Mater. Sci. Technol. ›› 2024, Vol. 171: 1-9.DOI: 10.1016/j.jmst.2023.07.010

• Research Article •     Next Articles

Construction of 2D/2D Ti3C2Tx MXene/CdS heterojunction with photothermal effect for efficient photocatalytic hydrogen production

T.Y. Huanga, Z. Yanga, S.Y. Yanga, Z.H. Daia, Y.J. Liua,**, J.H. Liaob, G.Y. Zhongc, Z.J. Xieb,**, Y.P. Fanga, S.S. Zhanga,c,*   

  1. aKey Laboratory for Biobased Materials and Energy of Ministry of Education, Guangdong Laboratory for Lingnan Modern Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou 510643, China;
    bSchool of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China;
    cSchool of Chemical Engineering and Energy Technology, Guangdong Provincial Key Laboratory of Distributed Energy Systems, Dongguan University of Technology, Dongguan 523808, China
  • Received:2023-05-30 Revised:2023-07-01 Accepted:2023-07-06 Published:2024-02-01 Online:2023-08-03
  • Contact: *zhangss@scau.edu.cn (S.S. Zhang). **Key Laboratory for Biobased Materials and Energy of Ministry of Education, Guangdong Laboratory for Lingnan Modern Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou 510643, China. E-mail addresses: yingjuliu@scau.edu.cn (Y.J. Liu), zjxie@scut.edu.cn (Z.J. Xie).

Abstract: The insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic reactions. Constructing photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor materials. Herein, a novel stable Ti3C2Tx MXene/CdS heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional (2D) CdS nanosheets on 2D MXene interface via a solvothermal method. The exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocatalytic hydrogen evolution capability upon the heterogeneous catalyst. The unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers, enhancing the photocatalytic performance of the catalyst. Moreover, the composite catalyst exhibits a significantly higher surface temperature of 80.4 °C under visible light irradiation at an intensity of 0.1 W/cm2, which is 1.84 times higher than that of CdS. Under irradiation of visible and near infrared light, the composite catalyst with photothermal effect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g-1 h-1, which is 7.2 times higher than that of CdS catalyst. This study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

Key words: Two-dimensional structure, Heterostructure, Photothermal effect, Photocatalyst, Hydrogen evolution