Thickness-dependent photocatalytic performance of graphite oxide for degrading organic pollutants under visible light

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Photocatalysts use sustainable solar light energy to trigger various catalytic reactions. Metal-free nanomaterials have been suggested as cost-effective and environmentally friendly photocatalysts. In this work, we propose thickness-controlled graphite oxide (GO) as a metal-free photocatalyst, which is produced by exfoliating thick GO particles via stirring and sonication. All GO samples exhibit photocatalytic activity for degrading an organic pollutant, rhodamine B under visible light, and the thickest sample shows the best catalytic performance. UV-vis-NIR diffuse reflectance absorption spectra indicate that thicker GO samples absorb more vis-NIR light than thinner ones. Density-functional theory calculations show that GO has a much smaller band gap than that of single-layer graphene oxide, and thus suggest that the largely-reduced band gap is responsible for this trend of light absorption
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2016-03
Language
English
Article Type
Article
Citation

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.18, no.16, pp.10882 - 10886

ISSN
1463-9076
DOI
10.1039/c6cp00582a
URI
http://hdl.handle.net/10203/210192
Appears in Collection
NT-Journal Papers(저널논문)
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