Preparation and characterization of surface bond-conjugated TiO2/SiO2 and photocatalysis for azo dyes

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	Preparation and characterization of surface bond-conjugated TiO2/SiO2 and photocatalysis for azo dyes
	Hu, C; Wang, YZ; Tang, HX
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2001
卷号	30 期号:2015-03-04 页码:277-285
关键词	adsorption azo dyes dispersion photodegradation surface bund conjugation titania/silica
英文摘要	Surface bond-conjugated TiO2/SiO2 was prepared by means of the impregnation method. Based on the results of XRD, FTIR, XPS and BET measurements, the growth of titania (predominantly anatase) on the silica substrate seems to occur by anchoring of the TiO2 phase through Ti-O-Si cross-linking bonds. The structure model of TiO2/SiO2 was proposed. Compared to B-TiO2, the most efficient catalyst is 30 wt.% TiO2/SiO2 (Ims30), which showed three times higher photoactivity for the degradation of reactive 15 (R15). In addition, the catalyst had a higher photoactivity on a silica of smaller particle size than on the silica of larger particles. Silica gel plays the basic role of dispersion and support for power TiO2. The isoelectric point of the catalyst was 3.0 pH units by the measurement of zeta-potential, indicating the presence of the surface acidity of the: catalyst. The photodegradation and the adsorption of R15 and cationic blue X-GRL (CBX) were investigated with the change of initial aqueous pH. (C) 2001 Elsevier Science B.V. All rights reserved.
WOS记录号	WOS:000167479500005
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24087]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Hu, C,Wang, YZ,Tang, HX. Preparation and characterization of surface bond-conjugated TiO2/SiO2 and photocatalysis for azo dyes[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2001,30(2015-03-04):277-285.
APA	Hu, C,Wang, YZ,&Tang, HX.(2001).Preparation and characterization of surface bond-conjugated TiO2/SiO2 and photocatalysis for azo dyes.APPLIED CATALYSIS B-ENVIRONMENTAL,30(2015-03-04),277-285.
MLA	Hu, C,et al."Preparation and characterization of surface bond-conjugated TiO2/SiO2 and photocatalysis for azo dyes".APPLIED CATALYSIS B-ENVIRONMENTAL 30.2015-03-04(2001):277-285.