| Preparation and Photocatalytic Behaviors of Nanoporous Polyoxotungstate-Anatase TiO2 Composites |
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| 作者姓名： | 李莉 李英杰 马禹 郭伊荇 |
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| 作者单位： | [1]Faculty of Chemistry, Northeast Normal University, Changchun 130024, China [2]Faculty of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China |
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| 基金项目： | Project supported by the Natural Science Fund Council of Heilongjiang Province （B200608） |
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| 摘 要： | Nanoporous anatase TiO2 crystalline particles coupled with Keggin or Wells-Dawson unit, H3PW12O40/TiO2 or H6P2W18O62/TiO2, were prepared at a low temperature （200℃ ） using sol-gel method combined with hydrothermal treatment at programmed temperature. The as-prepared composites have uniform anatase phase, and they exhibit both micrand mesoporosities with pore sizes of 0.6 and 4.0 nm, respectively, and their average size is lower than 10 nm. Photocatalytic tests show the composites exhibit relatively higher photocatalytic activities to decompose the organocholorine pesticide hexachlorobenzene（HCB） than anatase TiO2, the starting polyoxotungstates, and EuEOa/TiO2 prepared by using sol-gel method, and this was attributed to （ 1 ） the synergistic effect of photoactive anatase TiO2 with the polyoxotungstate, and （2） the fascinating physical and chemical properties of the porous materials.
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| 关 键 词： | 纳米多孔渗水材料 催化剂 热处理 溶胶凝胶法 二氧化钛 聚氧化乙烯钨酸盐 光催化作用 |
| 文章编号： | 1002-0721（2007）01-0068-06 |
| 收稿时间： | 20 December 2005 |
| 修稿时间： | 2005-12-202006-08-29 |
Preparation and Photocatalytic Behaviors of Nanoporous Polyoxotungstate-Anatase TiO2 Composites |
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| Li , Li Yingjie, Ma Yu,Guo Yihang,.Preparation and Photocatalytic Behaviors of Nanoporous Polyoxotungstate-Anatase TiO2 Composites[J].Journal of Rare Earths,2007,25(1):68-73. |
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| Authors: | Li Li Yingjie Ma Yu Guo Yihang |
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| Affiliation: | 1. Faculty of Chemistry, Northeast Normal University, Changchun 130024, China ; 2. Faculty of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China |
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| Abstract: | Nanoporous anatase TiO2 crystalline particles coupled with Keggin or Wells-Dawson unit, H3PW12O40/TiO2 or H6P2W18O62/TiO2, were prepared at a low temperature (200 ℃) using sol-gel method combined with hydrothermal treatment at programmed temperature. The as-prepared composites have uniform anatase phase, and they exhibit both micro-and mesoporosities with pore sizes of 0.6 and 4.0 nm, respectively, and their average size is lower than 10 nm. Photocatalytic tests show the composites exhibit relatively higher photocatalytic activities to decompose the organocholorine pesticide hexachlorobenzene(HCB) than anatase TiO2, the starting polyoxotungstates, and Eu2O3/TiO2 prepared by using sol-gel method, and this was attributed to (1) the synergistic effect of photoactive anatase TiO2 with the polyoxotungstate, and (2) the fascinating physical and chemical properties of the porous materials. |
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| Keywords: | polyoxotungstate anatase TiO2 photocatalysis sol-gel hydrothermal treatment |
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