Issue 36, 2015

Enhanced photocatalytic H2-evolution by immobilizing CdS nanocrystals on ultrathin Co0.85Se/RGO–PEI nanosheets

Abstract

We herein report a novel noble-metal-free photocatalytic H2-production system by immobilizing CdS nanocrystals on ultrathin Co0.85Se/graphene nanosheets. The well-designed composite material was prepared by a simple solvothermal method and achieved a dramatically enhanced H2-evolution performance when compared with other bulk counterparts. Under optimal conditions, the H2-evolution efficiency can reach up to 17.60 μmol mg−1 h−1 after 10 h of LED visible light irradiation, which is comparable to that of noble Pt nanoparticles (18.60 μmol mg−1 h−1). It is proposed that the unusual catalytic rate arises from the special nanostructure of Co0.85Se and a positive synergetic effect between Co0.85Se and graphene. The results show that the ultrathin Co0.85Se which possesses a half-metallic character is a promising noble-metal-free cocatalyst for practical photocatalytic hydrogen production application.

Graphical abstract: Enhanced photocatalytic H2-evolution by immobilizing CdS nanocrystals on ultrathin Co0.85Se/RGO–PEI nanosheets

Supplementary files

Article information

Article type
Paper
Submitted
02 Jul 2015
Accepted
05 Aug 2015
First published
19 Aug 2015

J. Mater. Chem. A, 2015,3, 18711-18717

Enhanced photocatalytic H2-evolution by immobilizing CdS nanocrystals on ultrathin Co0.85Se/RGO–PEI nanosheets

S. Cao, Y. Chen, L. Kang, Z. Lin and W. Fu, J. Mater. Chem. A, 2015, 3, 18711 DOI: 10.1039/C5TA04910E

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