Dual‐Modified Hollow Spherical Shell MoS2@TiO2/TiN Composites for Photocatalytic Hydrogen Production

Abstract

Coupling suitable cocatalysts is an effective strategy to improve the performance of photocatalytic hydrogen production. Herein, we constructed a dual‐cocatalyst‐modified TiO2‐based photocatalyst with a hollow‐spherical‐shell structure. Both the MoS2 nanosheets and the TiN particles are in intimate contact with the TiO2, resulting in multiple interfaces and junctions. According to experimental results and the band structure, the photogenerated electrons transfer from TiO2 to MoS2 or TiN through the multiple interfaces. The MoS2 and TiN together enhance the photocatalytic performance of TiO2. The hydrogen evolution rate of MoS2@TiO2/TiN (MTT) reaches 128.77 μmol g−1 h−1, which is 4.18 times higher than that of pristine TiO2 (30.81 μmol g−1 h−1). The performance improvement of composites is attributed to more catalytically active sites, stronger light absorption, and better electron–hole separation effects. This work aims to provide a strategy for the rational design of catalysts for further development in both mechanism understanding and practical application.