Cu2ZnSnS4-CdS heterostructured nanocrystals for enhanced photocatalytic hydrogen productionElectronic supplementary information (ESI) available: Synthetic and experimental details. See DOI: 10.1039/c7cy01360d

The CZTS-CdS heterostructured nanocrystals were designed and synthesized via a wet chemistry approach for the first time. The p-n heterojunction between CZTS core and CdS layer facilitates a effective charge separation and a rapid charge transfer. As expected, these CZTS-CdS-heterostructured nanocrystals show enhanced photocatalytic activities for hydrogen evolution when compared with CZTS and CdS. Novel Cu 2 ZnSnS 4 -CdS heterostructured nanocrystals with much higher photocatalytic activities for hydrogen production under visible light were designed and synthesized via wet chemistry approach for the first time.