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Citation: 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[J]. Acta Physico-Chimica Sinica, ;2007, 23(07): 1032-1036. doi: 10.3866/PKU.WHXB20070713 shu

Structural Characterization of Nanocrystalline TiO₂ fromIonic Liquid-Water Solvent Mixture and Its Photocatalytic Activity

1.
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

Received Date: 9 January 2007
Available Online: 22 May 2007

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 od 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.
- TiO2; Ionic liquid; Low-temperature hydrothermal; Methyl orange; Photocatalytic activity
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Structural Characterization of Nanocrystalline TiO2 fromIonic Liquid-Water Solvent Mixture and Its Photocatalytic Activity

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通讯作者: 陈斌, bchen63@163.com

Structural Characterization of Nanocrystalline TiO₂ fromIonic Liquid-Water Solvent Mixture and Its Photocatalytic Activity