Photocatalytic performance of TiO2 catalysts modified by H3PW12O40, ZrO2 and CeO2

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	Photocatalytic performance of TiO2 catalysts modified by H3PW12O40, ZrO2 and CeO2
	Cai Tiejun 1; Liao Yuchao 2; Peng Zhenshan 1; Long Yunfei 1; Wei Zongyuan 1; Deng Qian 1
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
	2009
卷号	21 期号:7 页码:997-1004
关键词	TiO2 H3PW12O40 ZrO2 CeO2 photocatalytic elimination of methanol
ISSN号	1001-0742
通讯作者	Cai, TJ
英文摘要	The binary composite photo-catalysts CeO2/TiO2, ZrO2/TiO2 and the ternary composite photo-catalysts H3PW12O40-CeO2/TiO2, H3PW12O40-ZrO2/TiO2 were prepared by sol-gel method. The catalysts were characterized by thermogravimetric-differential thermal analysis (TG-DTA), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The photocatalytic elimination of methanol was used as model reaction to evaluate the photocatalytic activity of the composite catalysts under ultraviolet light irradiation. The effects of doped content, activation temperature, time, initial concentration of methanol and gas flow rate on the catalytic activity were investigated. The results showed that after doping a certain amount of CeO2 and ZrO2, crystallization process of TiO2 Was restrained, particles of catalysts are smaller and more uniform. Doping ZrO2 not only significantly improved the catalytic activity, but also increased thermal stability. Doping H3PW12O40 also enhanced the catalytic activity. The catalytic activities of binary and ternary composite photocatalysts were significantly higher than un-dopcd TiO2. The dynamics law of photocatalytic reaction over the binary CeO2/TiO2 and ZrO2/TiO2 catalysts has been studied. The activation energy 15.627 and 15.631 kJ/mol and pre-exponential factors 0.5176 and 0.9899 s(-1) over each corresponding catalyst were obtained. This reaction accords to the first order dynamics law.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	HETEROPOLYACID PHOTOCATALYST ; TRANSITION ; DECOMPOSITION ; ACID ; DEGRADATION ; OXIDATION ; BEHAVIOR ; POWDER ; SITES ; OXIDE
收录类别	SCI
语种	英语
WOS记录号	WOS:000267908700021
公开日期	2013-12-11
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6788]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.Hunan Univ Sci & Technol, Coll Chem & Chem Engn, Xiangtan 411201, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Cai Tiejun,Liao Yuchao,Peng Zhenshan,et al. Photocatalytic performance of TiO2 catalysts modified by H3PW12O40, ZrO2 and CeO2[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2009,21(7):997-1004.
APA	Cai Tiejun,Liao Yuchao,Peng Zhenshan,Long Yunfei,Wei Zongyuan,&Deng Qian.(2009).Photocatalytic performance of TiO2 catalysts modified by H3PW12O40, ZrO2 and CeO2.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,21(7),997-1004.
MLA	Cai Tiejun,et al."Photocatalytic performance of TiO2 catalysts modified by H3PW12O40, ZrO2 and CeO2".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 21.7(2009):997-1004.