NDLI: Enhanced photogenerated carrier separation in CdS quantum dot sensitized ZnFe2O4/ZnIn2S4 nanosheet stereoscopic films for exceptional visible light photocatalytic H2 evolution performance

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Xin Xiao, Yuting Wang, Jinge Fu, Honggang Tian, Guohui Zhou, Wei Chen, Yajie
Copyright Year	2017
Abstract	CdS quantum dot sensitized ZnFe2O4/ZnIn2S4 nanosheet stereoscopic films were synthesized through two sequential solvothermal processes and the ionic layer adsorption-reaction method. The hydrophilic ZnIn2S4 nanosheet stereoscopic film was pre-prepared to act as a suitable host material, and then ZnFe2O4 nanoparticles and CdS quantum dots were uniformly decorated on the surface of the ZnIn2S4 nanosheet stereoscopic film to form a ternary heterostructure stereoscopic film. The band structure difference in the ternary heterostructure can promote the spatial separation and transport efficiency of photogenerated charge carriers. Meanwhile, the composite stereoscopic film has significant structural advantages and can provide a large amount of reaction active sites and outstanding visible light utilization. The superhydrophilic surface contributes to interface contact of catalyst/solution and gas detachment. These positive factors led to a significantly enhanced photocatalytic H2 evolution activity of the CdS/ZnFe2O4/ZnIn2S4 ternary heterostructure film in comparison with the pristine ZnIn2S4 and binary heterostructure film photocatalysts. The optimized CdS/ZnFe2O4/ZnIn2S4 ternary heterostructure film demonstrates the highest H2 production rate of 79.0 μmol h−1, which surpasses that of ZnIn2S4 by more than 3.2 times. This synthesis strategy can be applicable for the facile synthesis of other visible-light-driven composite film catalysts.
Starting Page	5912
Ending Page	5921
Page Count	10
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	9
Issue Number	18
Journal	Nanoscale
DOI	10.1039/c7nr00155j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Composite film Quantum dot Nanosheet Electronic band structure Hydrophile Quantum tunnelling Heterojunction
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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