J. Mater. Sci. Technol. ›› 2022, Vol. 120: 89-98.DOI: 10.1016/j.jmst.2021.12.028

• Research Article • Previous Articles     Next Articles

Delaminating Ti3C2 MXene by blossom of ZnIn2S4 microflowers for noble-metal-free photocatalytic hydrogen production

Weixin Huang1, Zhipeng Li1, Chao Wu, Hanjie Zhang, Jie Sun, Qin Li()   

  1. Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan, 430074, China
  • Received:2021-08-12 Revised:2021-11-24 Accepted:2021-12-16 Published:2022-09-01 Online:2022-03-01
  • Contact: Qin Li
  • About author:* E-mail address: liqin0518@mail.scuec.edu.cn (Q. Li).
    First author contact:

    1 The authors equally contribute to this work.

Abstract:

Herein, a novel strategy was exploited to achieve the delamination of Ti3C2 MXene multilayers into ultrathin flakes by blossom of ZnIn2S4 microflowers via a one-pot solvothermal method. There is no need to peel off the MXene bulk ahead of its combination with the semiconductor. The obtained ZnIn2S4/Ti3C2 binary composites were applied for visible-light-driven photocatalytic hydrogen production without noble metal cocatalyst, and the optimized sample exhibited a hydrogen-production efficiency of 978.7 μmol h - 1 g - 1 with the corresponding apparent quantum efficiency of 24.2% at 420 nm, which was 2.7 times higher than bare ZnIn2S4. Through the comprehensive analysis based on spectroscopy measurements, electrochemical techniques and energy band theory, such enhancement was mainly attributed to (1) the highly-exposed surface that was beneficial for the adequate exposure of reactive sites and (2) the intimate contact interface that favored the transfer of photogenerated carriers. This study provides a new way of thinking for synthesizing ultrathin MXene-based composite materials for noble-metal-free and highly-efficient photocatalysis applications.

Key words: ZnIn2S4, Ti3C2, Mxene, Photocatalysis, Hydrogen production