A novel dual S-scheme Co9S8/MnCdS/Co3O4 heterojunction for photocatalytic hydrogen evolution under visible light irradiation

A dual S-scheme heterojunction was constructed which expands the light absorption range and extends the carrier lifetime. The hydrogen evolution rate of Co 9 S 8 /MnCdS/Co 3 O 4 was 3.49 and 1.49 times higher than those of pristine MnCdS and MnCdS/Co 3 O 4 .