期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 184, 期 1-3, 页码 1-5出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2010.07.034
关键词
Photocatalysis; Ceria; Activated carbon; Composite; 4-CP
资金
- National Natural Science Foundation of China [40871227]
- Jiangsu province [BK2008041]
- University Natural Science Foundation of Jiangsu Education Bureau
- China Postdoctoral Science Foundation [20090450133]
In the present work, a novel composite photocatalyst ceria-coated activated carbon (CCAC) was prepared by a facile method. The composite photocatalyst was characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM) and photocatalytic degradation of 4-chlorophenol (4-CP). A synergy effect for 4-CP degradation was observed because the activated carbon (AC) with strong adsorbent activity provided sites for the adsorption of 4-CP. Then, the adsorbed 4-CP can migrate continuously onto the surface of ceria particles and then degraded at there. Hydroquinone (HQ) and benzoquinone (BQ) were found to be the main intermediates of the photocatalytic 4-CP degradation with ceria or CCAC by HPLC measurement. The results suggested that the same reaction mechanism occurred in the presence of ceria or titania. (c) 2010 Elsevier B.V. All rights reserved.
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