Photocatalytic degradation of dyes on a magnetically separated photocatalyst under visible and UV irradiation

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	Photocatalytic degradation of dyes on a magnetically separated photocatalyst under visible and UV irradiation
	Chen, F ; Xie, YD ; Zhao, JC ; Lu, GX
刊名	CHEMOSPHERE
	2001-08-01
卷号	44 期号:5 页码:1159-1168
关键词	Tio2 Sio2 Gamma-fe2o3 Photocatalysis Magnetically Separated Photocatalyst
ISSN号	0045-6535
英文摘要	A novel kind of magnetically separable photocatalyst of TiO2/SiO2/gamma -FeO3 (TSF) is prepared. Scanning tunnel microscope (STM) and X-ray diffractometer (XRD) were used to characterize the structure of the photocatalyst. In the TSF photocatalyst, a TiO2 shell is for photocatalysis, a gamma -Fe2O3 core as a carrier is for separation by the magnetic field and a SiO2 membrane between the TiO2 shell and the gamma -Fe2O3 core is used to weaken the adverse influence of gamma -Fe2O3 on the photocatalysis of TiO2. Three kinds of dyes, Fluoresein, Orange II and Red acid G, were used to examine the photocatalytic activity of TSF. Due to strong UV adsorption of the gamma -Fe2O3, the photocatalytic activity of TSF was lower than that of the pure TiO2. Deducting the light absorption of the gamma -Fe2O3 particles, the photocatalytic activity of TSF was found to be higher than that of the P25 under UV irradiation. On the other hand, the photocatalytic activity of TSF under visible irradiation was much lower than that of the P25 TiO2 even deducting the visible light absorption of the gamma -Fe2O3 particles. Differences in the photocatalytic mechanisms under UV and visible irradiation lead to the differences in the photodegradation characteristics of dyes on TSF. The recycled TSF exhibited a good repeatability of photocatalytic activity. (C) 2001 Elsevier Science Ltd. All rights reserved.
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000170405300033
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/77497]
专题	中国科学院化学研究所
通讯作者	Zhao, JC
作者单位	1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Lab Photochem, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab OSSO, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Chen, F,Xie, YD,Zhao, JC,et al. Photocatalytic degradation of dyes on a magnetically separated photocatalyst under visible and UV irradiation[J]. CHEMOSPHERE,2001,44(5):1159-1168.
APA	Chen, F,Xie, YD,Zhao, JC,&Lu, GX.(2001).Photocatalytic degradation of dyes on a magnetically separated photocatalyst under visible and UV irradiation.CHEMOSPHERE,44(5),1159-1168.
MLA	Chen, F,et al."Photocatalytic degradation of dyes on a magnetically separated photocatalyst under visible and UV irradiation".CHEMOSPHERE 44.5(2001):1159-1168.