期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 223, 期 -, 页码 79-83出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2012.04.050
关键词
Graphene; Photo-electrocatalysis; Titania; Composite film electrode
资金
- National Key Basic Research Development Program (973 project) of China [2010CB429006, 2008CB418203]
- National Natural Science Foundation of China [50830304, 51108158]
- Basic Research Project of Jiangsu Province [BK2008041]
Graphene-titania composite film electrodes have been fabricated by a dip-coating method. Transmission electron microscopy (TEM) images show that the titania nanoparticles were dispersed uniformly, with only a little aggregation on the surface and edges of the graphene sheets. XRD analysis showed that the composite electrodes comprised the anatase phase of titania with just a little rutile phase. The photo-electrocatalytic activities of the as-prepared samples were investigated by studies of the degradation of Reactive Brilliant Red dye X-3B (C.l. reactive red 2). An enhancement of the photocurrents was observed using the graphene-titania composite electrodes, compared with pure titania film electrodes, under UV light irradiation. This improvement is attributed to the following two reasons: enhanced migration efficiency of the photo-induced electrons and enhanced adsorption activity of the dye molecules. In addition, we investigated the effects of graphene content and pH values on the photoelectrocatalytic activity of the as-prepared composite film electrodes. Results showed that there was an optimal amount of 5% (initial graphite oxide content). (C) 2012 Elsevier B.V. All rights reserved.
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