| Low Temperature Solvent Evaporation-induced Crystallization Synthesis of Nanocrystalline TiO2 Photocatalyst |
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| 作者姓名： | 余家国 余济美 |
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| 作者单位： | State Key Laboratory of Advanced Technology for Materials Synthesis and Processing，Wuhan University of Technology，Department of Chemistry and Materials Science & Technology Research Center，The Chinese University of Hong Kong，Shatin，New Territories Wuhan，Hubei 430070，China，Hong Kong，China |
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| 基金项目： | theNationalNaturalScienceFoundationofChina (No .5 0 2 72 0 49) |
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| 摘 要： | A novel and efficient methodology for obtaining highly active photocatalyst of bi-phase TiO2 with small particle size and high specific surface area was developed by solvent evaporation-in-duced crystallization (SEIC) method at low temperature. The prepared TiO2 powder was characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM) and BET surface areas. The photocatalyfic activity was evaluated by the photocatalyflc oxidation of acetone in air. The results showed that the photocatalytic activity of the TiO2 powder preDared by this method approached that of Degnssa P25. This may be atotributed to the fact that the predated TiO2 powder had larzer specific surface areas (265 m2. g- 1 ) and smaller crystallite size (about 5 nm), but relatively low crystallinity, as compared with Degussa P25.
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| 关 键 词： | 低温溶剂 蒸发诱导结晶 合成 纳米晶体 TiO2 二氧化钛 光催化剂 污染物处理 |
Low Temperature Solvent Evaporation-induced Crystallization Synthesis of Nanocrystalline TiO_2 Photocatalyst |
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| Yu Jia‐Guo,Yu Jimmy C.Low Temperature Solvent Evaporation-induced Crystallization Synthesis of Nanocrystalline TiO2 Photocatalyst[J].Chinese Journal of Chemistry,2003,21(8):994-997. |
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| Authors: | Yu Jia‐Guo Yu Jimmy C |
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| Abstract: | A novel and efficient methodology for obtaining highly active photocatalyst of bi‐phase TiO2 with small particle size and high specific surface area was developed by solvent evaporation‐induced crystallization (SEIC) method at low temperature. The prepared TiO2 powder was characterized with X‐ray diffraction (XRD), transmission electron microscopy (TEM) and BET surface areas. The photocatalytic activity was evaluated by the photocatalytic oxidation of acetone in air. The results showed that the photocatalytic activity of the TiO2 powder prepared by this method approached that of Degussa P25. This may be attributed to the fact that the prepared TIO2 powder had larger specific surface areas (265 nr2. g?1) and smaller crystallite size (about 5 nm), but relatively low crystallinity, as compared with Degussa P25. |
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| Keywords: | solvent evaporation induced crystallization method titanium dioxide nanocrystalline photocatalyst |
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