Ti3C2 assisting 1T&2H-MoS2/TiO2 Z-scheme heterojunction as a prospective photocatalyst for sulfamethazine degradation

Herein, we report a two-dimensional (2D) Ti3C2/1T&2H-MoS2/TiO2 photocatalyst obtained by in situ growth of a 1T&2H-MoS2/TiO2 Z-scheme heterojunction on a highly conductive Ti3C2 MXene surface. The spectral response range of the resulting Ti3C2/1T&2H-MoS2/TiO2 (Ti3C2:1T&2H-MoS2:TiO2= 1:10:10) photocatalyst was broadened and the band gap was reduced. These results demonstrate that Ti3C2 MXene assisted Z-type heterojunction is a feasible strategy to expand the optical absorption range and reduce the band gap of TiO2 for photocatalytic application.

本研究报道了一种二维（2D）Ti₃C₂/1T&2H相二硫化钼/二氧化钛（Ti3C2/1T&2H-MoS2/TiO2）光催化剂，该催化剂通过在高导电Ti₃C₂ MXene（Ti3C2 MXene）表面原位生长1T&2H-MoS2/TiO2 Z型异质结（Z-scheme heterojunction）制备得到。所制得的Ti₃C₂/1T&2H-MoS2/TiO2（物料比为Ti3C2:1T&2H-MoS2:TiO2 = 1:10:10）光催化剂，其光谱响应范围得到拓宽，禁带宽度显著降低。上述结果证明，借助Ti₃C₂ MXene辅助构建Z型异质结，是拓展TiO₂光吸收范围、降低其禁带宽度以用于光催化应用的可行策略。