MoS₂ Quantum Dots Modified Black Ti³⁺–TiO₂/g‐C₃N₄ Hollow Nanosphere Heterojunction toward Photocatalytic Hydrogen Production Enhancement

Abstract

The MoS 2 quantum dots (QDs) modified black Ti 3+ –TiO 2 /g‐C 3 N 4 hollow nanosphere heterojunction is synthesized via the continuous chemical template deposition and sculpture–reduction processes. The results of structural characterizations imply that the Ti 3+ –TiO 2 /g‐C 3 N 4 /MoS 2 QDs hollow nanosphere heterojunction is prepared successfully. The photocatalytic hydrogen evolution reaction (HER) of the B‐TiO 2 /g‐C 3 N 4 /MoS 2 QDs (≈1524.37 μmol g −1 h −1 ) exhibits an enhancement of ≈33 folds compared with the normal TiO 2 . Furthermore, the process of photocatalysis and the mechanism of photocatalytic HER enhancement are explored, which can be ascribed to the HER activity sites of MoS 2 QDs, Ti 3+ /O v ions in the Ti 3+ –TiO 2 , and hollow nanosphere heterojunction, which are proved by electrochemical measurements.