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Acta Physico-Chimica Sinica  2007, Vol. 23 Issue (07): 1032-1036    DOI: 10.3866/PKU.WHXB20070713
Article     
Structural Characterization of Nanocrystalline TiO2 fromIonic Liquid-Water Solvent Mixture and Its Photocatalytic Activity
YAN Zhi-Ying; WU Li-Yan; SUN Gui-Xiang; ZHANG Ning; ZHENG Wen-Jun
Department of Materials Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China; Department of Applied Chemistry, Yunnan University, Kunming 650091, P. R. China
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Abstract  

Nanocrystalline TiO2 was synthesized by the low-temperature hydrothermal method using ionic liquid (1-ethyl-3-methyl-imidazole acetate)-water mixture as solvent; various studies such as X-ray diffraction, Brunauer-Emmett-Teller surface area, X-ray photoelectron spectra, UV-Vis spectroscopy were conducted. The products prepared from ionic liquid-water mixture possessed good anatase crystallinity and contained less brookite phase than that from pure water. The photocatalytic degradation of methyl orange in water was studied in photoreactor with UV lamp as light source. The product prepared from ionic liquid-water solvent for 24 h showed superior photocatalytic activity for the degradation of methyl orange compared to commercial TiO2, Degussa P25. The higher photocatalytic activity was attributed to the crystal phase, grain size, and specific surface area of the catalyst. Further, the effects of the catalyst amount and pH value of solution on the photocatalytic activity of the product were also investigated.



Key wordsTiO2      Ionic liquid      Low-temperature hydrothermal      Methyl orange      Photocatalytic activity     
Received: 09 January 2007      Published: 22 May 2007
MSC2000:  O643  
Corresponding Authors: ZHENG Wen-Jun     E-mail: zhwj@nankai.edu.cn
Cite this article:

YAN Zhi-Ying; WU Li-Yan; SUN Gui-Xiang; ZHANG Ning; ZHENG Wen-Jun. Structural Characterization of Nanocrystalline TiO2 fromIonic Liquid-Water Solvent Mixture and Its Photocatalytic Activity. Acta Physico-Chimica Sinica, 2007, 23(07): 1032-1036.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20070713     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2007/V23/I07/1032

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