稀土负载钛-硅沸石 ETS-10 的制备及其光催化性质

doi:10.1016/S1872-2067(10)60293-8

催化学报 ›› 2012, Vol. 33 ›› Issue (1): 123-128.DOI: 10.1016/S1872-2067(10)60293-8

稀土负载钛-硅沸石 ETS-10 的制备及其光催化性质

任远航, 辜敏, 胡怡晨, 岳斌a, 江磊, 孔祖萍, 贺鹤勇b

复旦大学化学系, 上海市分子催化和功能材料重点实验室, 上海 200433

收稿日期:2011-07-21 修回日期:2011-09-26 出版日期:2012-01-16 发布日期:2015-05-26

Preparation and Photocatalytic Activity of Lanthanide Loaded Microporous Titanosilicate ETS-10 Catalysts

REN Yuanhang, GU Min, HU Yichen, YUE Bina, JIANG Lei, KONG Zuping, HE Heyongb

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China

Received:2011-07-21 Revised:2011-09-26 Online:2012-01-16 Published:2015-05-26

摘要/Abstract

摘要： 以水玻璃和四氯化钛为原料, 在不使用有机模板剂、氟离子和晶种的条件下, 用水热法合成了钛-硅沸石 ETS-10, 将 La、Ce、Pr 和 Nd 四种稀土元素负载到合成的 ETS-10 上. 通过 X 射线粉末衍射、N2 吸附-脱附、29Si 魔角旋转核磁共振、紫外漫反射光谱、X 射线荧光光谱等表征手段对负载前后的 ETS-10 进行了表征. 以有机染料甲基橙为底物, 考察了负载各种稀土及氢氟酸腐蚀对 ETS-10 的光催化活性的影响. 结果表明, 四种稀土元素的引入均可有效提高 ETS-10 的光催化活性. 反应活性提高的程度与稀土元素负载量有关. 对 ETS-10 同时进行氢氟酸腐蚀和稀土元素的负载, 可以将 ETS-10 的光催化活性提高近一倍, 与锐钛矿相 TiO2 相当, 但前者更易分离.

关键词: 钛硅沸石, 微孔钛硅分子筛 (ETS-10), 稀土, 光催化反应, 甲基橙

Abstract: The three dimensional microporous titanosilicate, ETS-10, was synthesized by a hydrothermal synthesis route using TiCl₄ and a sodium silicate aqueous solution as starting materials. Lanthanide (La, Ce, Pr, Nd) loaded ETS-10 catalysts were prepared by the impregnation method. The catalysts were characterized by X-ray diffraction, ²⁹Si magic angle spinning NMR, UV-Vis diffuse reflectance spectroscopy, N₂ adsorption-desorption measurement, and X-Ray fluorescence spectroscopy. The degradation of methyl orange under near-UV light was used to investigate the photocatalytic activity of the catalysts in aqueous suspensions. The lanthanide loaded ETS-10 catalysts exhibit higher activity than the unmodified ETS-10. The combination of loading lanthanide and increasing the surface defects of ETS-10 by a HF treatment gave an enhancement of the photocatalytic activity, which became comparable with that of anatase TiO₂.

Key words: microporous titanosilicate, Engelhard titanosilicate material number 10 (ETS-10), lanthanide, photocatalysis, methyl orange

任远航, 辜敏, 胡怡晨, 岳斌, 江磊, 孔祖萍, 贺鹤勇b. 稀土负载钛-硅沸石 ETS-10 的制备及其光催化性质[J]. 催化学报, 2012, 33(1): 123-128.

REN Yuan-Hang, GU Min, HU Yi-Chen, YUE Bin, JIANG Lei, KONG Zu-Ping, HE He-Yong-b. Preparation and Photocatalytic Activity of Lanthanide Loaded Microporous Titanosilicate ETS-10 Catalysts[J]. Chinese Journal of Catalysis, 2012, 33(1): 123-128.

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稀土负载钛-硅沸石 ETS-10 的制备及其光催化性质

Preparation and Photocatalytic Activity of Lanthanide Loaded Microporous Titanosilicate ETS-10 Catalysts

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