Enhanced photocatalytic overall water splitting via hollow structure Pt/g-C3N4/BiOBr photocatalyst with S-scheme heterojunction

Photocatalytic overall water splitting is considered as one of the most promising way to solve the energy crisis. Herein, Pt/g-C3N4/BiOBr S-scheme heterojunction photocatalyst with hollow microsphere structure was prepared by solvothermal method, and its photocatalytic activity toward overall water splitting was evaluated. The H2 evolution rate of Pt/g-C3N4/BiOBr is 361 μmol·g−1·h−1, which is 2.7 times higher than that of g-C3N4. Furthermore, it is noteworthy that the overall water splitting occurred through the two-electron pathway. S-scheme heterojunction, hollow structures and surface plasmonic resonance of Pt are combined in one photocatalyst system. This study provides a new way for the development of high efficiency H2 evolution photocatalyst.