Enhanced photocatalytic activity for titanium dioxide by co-modifying with silica and fluorine

CORC > 沈阳应用生态研究所 > 中国科学院沈阳应用生态研究所 > 沈阳应用生态研究所 > 期刊论文

	Enhanced photocatalytic activity for titanium dioxide by co-modifying with silica and fluorine
	Yang, SG ; Sun, C ; Li, XY ; Gong, ZQ ; Quan, X
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2010
卷号	175 期号:1-3 页码:258-266
关键词	Photocatalytic activity F-Si-codoped titania ESR Methyl orange
ISSN号	0304-3894
通讯作者	Yang, SG, Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210093, Peoples R China
中文摘要	F-Si-co-modified TiO2 (FST) samples with different ratios of fluorine to titanium (RF) and silica to titanium (R.), were successfully synthesized by ultrasound-assisted hydrolysis. The structure and properties of the as-prepared codoped titania were characterized by means of XRD, TEM, XPS, BET, UV-Vis diffuse reflectance spectra and ESR. XRD analysis showed that Si and F atoms prevented phase transition of anatase to rutile and suppressed the growth of titania crystalline. ESR results showed that the concentration of the active species ((OH)-O-center dot) on 1%-FST(Rx=10%) was higher than that on other FST samples and P25 titania. The improvement in photocatalytic activity relative to titania can be achieved by co-modifying fluorine and silica to fabricate FST composite material. The photocatalytic activity of FST powders for decomposition of methyl orange was affected by the content of fluorine and the content of silica. When the ratios of R-F and R-x were 1 and 10%, respectively, 1%-FST(Rx=10%) shows the best among photocatalytic activity, which is much superior to P25 under UV-Vis irradiation. The possible reasons for the high photocatalytic activity of the FST powders were proposed in the paper. In addition, the stability of the FST powders in photocatalytic process was confirmed based on the XPS analysis. (C) 2009 Elsevier B.V. All rights reserved.
学科主题	Engineering ; Environmental; Engineering ; Civil; Environmental Sciences
收录类别	SCI
资助信息	National Natural Science Foundation of China [20707009]; Science & Technology Ministry of China [2008ZX07421-002, 2008ZX08526-00]; Opening Foundation for Key Laboratory of Industrial Ecology and Environmental Engineering [0703]
语种	英语
WOS记录号	WOS:000274490400029
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/53921]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Yang, SG,Sun, C,Li, XY,et al. Enhanced photocatalytic activity for titanium dioxide by co-modifying with silica and fluorine[J]. JOURNAL OF HAZARDOUS MATERIALS,2010,175(1-3):258-266.
APA	Yang, SG,Sun, C,Li, XY,Gong, ZQ,&Quan, X.(2010).Enhanced photocatalytic activity for titanium dioxide by co-modifying with silica and fluorine.JOURNAL OF HAZARDOUS MATERIALS,175(1-3),258-266.
MLA	Yang, SG,et al."Enhanced photocatalytic activity for titanium dioxide by co-modifying with silica and fluorine".JOURNAL OF HAZARDOUS MATERIALS 175.1-3(2010):258-266.