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Issue 28, 2015
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Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

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Abstract

Herein, we reported a simple and “green” method for preparing the ternary photocatalyst Ag–graphene quantum dots (GQDs)–ZnO. In this method, an aqueous solution of GQDs not only acted as a substituent for the organic solvent for preparing the ZnO precursor but was also used as a reducing agent for the in situ synthesis of Ag nanoparticles (NPs). X-ray diffraction analysis and scanning electron microscopy were employed to confirm the effects of the GQD solution as a solvent on the ZnO structure. Transmission electron microscopy confirmed the synthesis of Ag NPs in the GQD solution as well as the formation of close interconnections between them. Furthermore, photocatalytic tests involving the degradation of Rhodamine B showed that the synthesized ternary photocatalyst displayed excellent visible-light photocatalytic activity, which was much higher than that of pure ZnO and binary photocatalysts such as Ag–ZnO and GQDs–ZnO. We believe that this method will lead to the “green” synthesis of hybrid metal/carbon/semiconductor photocatalysts with higher photocatalytic activities.

Graphical abstract: Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

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Supplementary files

Article information


Submitted
22 Apr 2015
Accepted
15 Jun 2015
First published
15 Jun 2015

Phys. Chem. Chem. Phys., 2015,17, 18645-18652
Article type
Paper

Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

J. Wang, Y. Li, J. Ge, B. Zhang and W. Wan, Phys. Chem. Chem. Phys., 2015, 17, 18645
DOI: 10.1039/C5CP02352A

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