材料科学
光催化
制氢
复合数
分层(地质)
贵金属
氢
化学工程
金属
分解水
半导体
纳米技术
复合材料
催化作用
光电子学
冶金
有机化学
工程类
古生物学
化学
生物
构造学
俯冲
作者
Weixin Huang,Zhipeng Li,Chao Wu,Hanjie Zhang,Jie Sun,Qin Li
标识
DOI:10.1016/j.jmst.2021.12.028
摘要
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.
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