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http://dx.doi.org/10.5012/bkcs.2014.35.9.2660

Photocatalytic Degradation of Methylene Blue in Presence of Graphene Oxide/TiO2 Nanocomposites  

Kim, Sung Phil (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.35, no.9, 2014 , pp. 2660-2664 More about this Journal
Abstract
A simple method of depositing titanium dioxide ($TiO_2$) nanoparticles onto graphene oxide (GO) as a catalytic support was devised for photocatalytic degradation of methylene blue (MB). Thiol groups were utilized as linkers to secure the $TiO_2$ nanoparticles. The resultant GO-supported $TiO_2$ (GO-$TiO_2$) sample was characterized by transmission electron microscopy (TEM), near-edge X-ray absorption fine structure (NEXAFS), and X-ray photoelectron spectroscopy (XPS) measurements, revealing that the anatase $TiO_2$ nanoparticles had effectively anchored to the GO surface. In the photodegradation of MB, GO-$TiO_2$ exhibited remarkably enhanced photocatalytic efficiency compared with thiolated GO and pure $TiO_2$ nanoparticles. Moreover, after five-cycle photodegradation experiment, no obvious deactivation was observed. The overall results showed that thiolated GO provides a good support substrate and, thereby, enhances the photodegradation effectiveness of the composite photocatalyst.
Keywords
Thiolated graphene oxide; GO-$TiO_2$; Photocatalyst; Methylene blue;
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