[2013年5月31日]

Dual Cocatalysts Loaded Type I CdS/ZnS Core/Shell Nanocrystals as Effective and Stable Photocatalysts for H2 Evolution

The photocatalytic activity and stability of nanocrystals (NCs) are two important issues for their application in photocatalysis. In this work, we report a combined method to promote the photocatalytic a ct iv it y as wel l a s th e s tab i li ty of Cd S NCs f or ph o to ca tal yt ic H 2 evolution. ZnS shell was grown on CdS NCs forming type I core/shell C dS /Z nS nan ocr ys ta ls ( NCs ) to r est r ain th e ph ot oc orr os io n a nd passivate the trap states on CdS NCs. Thereafter, dual cocatalysts were loaded to promote the separation and transfer of electrons and holes from the core to outer surface for photocatalytic reactions. It is found that Pt and Ni are e ffective reduction cocatalysts (RCs) while PdS and PbS are e ffective oxidation cocatalysts (OCs) for promoting the charge separation and transfer. This strategy was also proved to be e ffective for other type I core/shell NCs, such as CdTe/ CdS/ZnS NCs.

Dual Cocatalysts Loaded Type I CdS/ZnS Core/Shell Nanocrystals as Effective and Stable Photocatalysts for H2 Evolution
Lei Huang , Xiuli Wang , Jinhui Yang , Gang Liu , Jingfeng Han , and Can Li*
J. Phys. Chem. C, DOI:10.1021/jp400010z
http://pubs.acs.org/doi/abs/10.1021/jp400010z




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