水热法合成的介孔二氧化钛的结构表征及其对水中 2,4,6-三溴苯酚的光催化降解活性

doi:10.1016/S1872-2067(10)60241-0

催化学报 ›› 2011, Vol. 32 ›› Issue (8): 1349-1356.DOI: 10.1016/S1872-2067(10)60241-0

水热法合成的介孔二氧化钛的结构表征及其对水中 2,4,6-三溴苯酚的光催化降解活性

罗海英 1,2, 聂信 1,2, 李桂英 1, 刘冀锴 1,2, 安太成 1,*

1 中国科学院广州地球化学研究所有机地球化学国家重点实验室, 广东省环境资源利用与保护重点实验室, 广东广州 510640; 2 中国科学院研究生院, 北京 100049

收稿日期:2011-03-31 修回日期:2011-05-16 出版日期:2011-08-05 发布日期:2014-12-26

Structural Characterization and Photocatalytic Activity of Hydrothermally Synthesized Mesoporous TiO2 for 2,4,6-Tribromophenol Degradation in Water

LUO Haiying1,2, NIE Xin1,2, LI Guiying1, LIU Jikai1,2, AN Taicheng1,*

1State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received:2011-03-31 Revised:2011-05-16 Online:2011-08-05 Published:2014-12-26

摘要/Abstract

摘要： 以聚丙二醇 (PPG) 为模板剂, 采用水热法制备了可控介孔 TiO2 纳米晶体. 醋酸水溶液为水解抑制剂和催化剂. 运用 X 射线衍射、热重分析、扫描电镜和氮气吸附-脱附等技术对样品进行了表征. 详细考察了制备过程、模板剂含量和煅烧温度等参数对样品结构和光催化活性的影响, 并将样品用于紫外光下降解水体中典型溴代阻燃剂 2,4,6-三溴苯酚的反应中, 阐明制备的介孔 TiO2 结构与光催化活性之间的关系. 结果表明, 所制样品为具有规则孔道结构、较大的孔径和较高比表面积的介孔 TiO2. 其中, 在 400 °C 煅烧、PPG 添加量为 20% 时所得介孔 TiO2 的光催化活性最高, 反应 1 h 可将 100 umol/L 的 2,4,6-三溴苯酚完全降解.

关键词: 介孔二氧化钛, 水热合成, 结构表征, 光催化活性, 2,4,6-三溴苯酚

Abstract: Well defined mesoporous TiO₂ (M-TiO₂) nanocrystallites were prepared by the hydrothermal method using polypropylene glycol (PPG) as template. The method differs from traditional methods in the use of an acetic acid aqueous solution instead of the conventional hydrolysis inhibitors and acid catalysts. The morphology and microstructures of M-TiO₂ were characterized by X-ray diffraction, thermogravimetric and differential thermogravimetric, scanning electron microscopy, and nitrogen adsorption-desorption. The effects of the synthesis process, template reagent content, and calcination temperature on the microstructure and photocatalytic activity were investigated. The relationship between the microstructure of M-TiO₂and its photocatalytic activity was studied by the photocatalytic degradation of 2,4,6-tribromophenol in water under UV irradiation. M-TiO₂with a regular channel structure, large pore size, and high specific surface area was successfully synthesized. The M-TiO₂ synthesized by the hydrothermal method and calcined at 400 °C that used a PPG content of 20% gave the highest photocatalytic activity, and completely degraded 100 umol/L 2,4,6-tribromophenol within 1 h.

Key words: mesoporous titania, hydrothermal synthesis, structure characterization, photocatalytic activity, 2,4,6-tribromophenol

罗海英, 聂信, 李桂英, 刘冀锴, 安太成. 水热法合成的介孔二氧化钛的结构表征及其对水中 2,4,6-三溴苯酚的光催化降解活性[J]. 催化学报, 2011, 32(8): 1349-1356.

LUO Hai-Ying, NIE Xin, LI Gui-Ying, LIU Ji-Kai, AN Tai-Cheng-. Structural Characterization and Photocatalytic Activity of Hydrothermally Synthesized Mesoporous TiO2 for 2,4,6-Tribromophenol Degradation in Water[J]. Chinese Journal of Catalysis, 2011, 32(8): 1349-1356.

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水热法合成的介孔二氧化钛的结构表征及其对水中 2,4,6-三溴苯酚的光催化降解活性

Structural Characterization and Photocatalytic Activity of Hydrothermally Synthesized Mesoporous TiO2 for 2,4,6-Tribromophenol Degradation in Water

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