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Graphene quantum dots-decorated ZnS nanobelts with highly efficient photocatalytic performances

Cited 33 time in Web of Science Cited 34 time in Scopus
Authors
Ham, Sooho; Kim, Yeonho; Park, Myung Jin; Hong, Byung Hee; Jang, Du-Jeon
Issue Date
2016-03
Citation
RSC Advances, Vol.6 No.29, pp.24115-24120
Abstract
Hybrid nanostructures combining inorganic materials and graphene have shown great potential for the environmentally friendly treatment of effluents. Herein, graphene quantum dots (GQDs)-decorated ZnS nanobelts have been synthesized via a facile hydrothermal method. The electrostatic attraction of two materials and the thermal reduction of graphene are the main driving forces to fabricate well-defined composite nanostructures. GQDs in GQD/ZnS nanocomposites have been found to exist discretely and uniformly on the surfaces of ZnS nanobelts. The photocatalytic activity of GQD/ZnS nanocomposites has been found to be highest at a GQD/ZnS mass ratio of 8 x 10(-4). The photocatalytic rate constant (0.0046 min(-1)) of GQD/ZnS nanocomposites having the optimized GQD content in the photodegradation reaction of rhodamine B has been found to be 14 times higher than that of commercially available ZnS powder. Decorated GQDs introduce an additional visible-light response and serve as electron collectors and transporters to block electron-hole recombination efficiently, enhancing the photocatalytic performances of ZnS nanobelts immensely.
ISSN
2046-2069
URI
https://hdl.handle.net/10371/172270
DOI
https://doi.org/10.1039/c5ra28026e
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College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
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