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 TiO 2 ‐based photocatalyst with a hollow‐spherical‐shell structure. Both the MoS 2 nanosheets and the TiN particles are in intimate contact with the TiO 2 , resulting in multiple interfaces and junctions. According to experimental results and the band structure, the photogenerated electrons transfer from TiO 2 to MoS 2 or TiN through the multiple interfaces. The MoS 2 and TiN together enhance the photocatalytic performance of TiO 2 . The hydrogen evolution rate of MoS 2 @TiO 2 /TiN (MTT) reaches 128.77 μmol g −1 h −1 , which is 4.18 times higher than that of pristine TiO 2 (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.