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http://dx.doi.org/10.5012/bkcs.2013.34.12.3586

ZnO on Thiolated Graphene Oxide as Efficient Photocatalyst for Degradation of Methylene Blue  

Kim, Yu Hyun (Department of Chemistry and Institute of Basic Science, Chonnam National University)
Choi, Hyun Chul (Department of Chemistry and Institute of Basic Science, Chonnam National University)
Publication Information
Bulletin of the Korean Chemical Society / v.34, no.12, 2013 , pp. 3586-3590 More about this Journal
Abstract
We present here an efficient and simple method for preparation of highly active heterogeneous ZnO photocatalyst (graphene oxide-zinc oxide: GO-ZnO), specifically by deposition of ZnO nanoparticles onto thiolated GOs. The resultant GO-ZnO sample was characterized by TEM, XRD, Auger, XPS, and Raman measurements, revealing that the size-similar and quasi-spherical ZnO nanoparticles were anchored to the thiolated GO surfaces. The average particle diameter was about 2.5 nm. In the photodegradation of methylene blue (MB) under ultraviolet (UV) light, GO-ZnO exhibited remarkably enhanced photocatalytic efficiency compared with thiolated GO and pure ZnO particles. This strong photocatalytic performance of GO-ZnO can be attributed to the suppression of electron recombination and the enhancement of mass transportation. The results showed that thiolated GO is the preferable supporting material.
Keywords
Thiolated graphene oxide; GO-ZnO; Photocatalyst; Methylene blue;
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