Self-assembly of three-dimensional CdS nanosphere/graphene networks for efficient photocatalytic hydrogen evolution

In this work, we report the construction of three-dimensional (3D) CdS nanosphere/graphene networks by a one-step hydrothermal self-assembly route. The 3D graphene networks not only enhance the light scattering, thanks to the interconnected 3D architecture, but also improve the crystallinity of depo...

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Bibliographic Details
Published in:Journal of energy chemistry 2019-04, Vol.31, p.34-38
Main Authors: Wang, Zhijian, Liu, Zhi, Chen, Jiazang, Yang, Hongbin, Luo, Jianqiang, Gao, Jiajian, Zhang, Junming, Yang, Cangjie, Jia, Suping, Liu, Bin
Format: Article
Language:English
Subjects:
3D graphene network
CdS nanosphere
Charge transfer
Hydrogen evolution
Photocatalysis
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Summary:In this work, we report the construction of three-dimensional (3D) CdS nanosphere/graphene networks by a one-step hydrothermal self-assembly route. The 3D graphene networks not only enhance the light scattering, thanks to the interconnected 3D architecture, but also improve the crystallinity of deposited CdS nanospheres, and at the same time provide a direct electron pathway to quickly separate the photogenerated electron-hole pairs from CdS, which thus dramatically improve the photocatalytic activity. The optimized 3D CdS nanosphere/graphene networks with 2 wt% of graphene could produce molecular hydrogen at a rate of 2310 µmol gcatalyst−1 h−1 under visible-light illumination (λ > 400 nm). 3D CdS nanosphere/graphene networks were constructed. The graphene networks not only enhance the light scattering, but also provide direct electron pathways to quickly separate photogenerated electron-hole pairs, which thus dramatically improve the photocatalytic activity. [Display omitted]
ISSN:2095-4956
DOI:10.1016/j.jechem.2018.05.006