酸对合成二氧化钛介孔材料的影响

doi:10.3724/SP.J.1077.2009.00043

无机材料学报

酸对合成二氧化钛介孔材料的影响

何菁萍，张昭，沈俊，张钰婷，陈垚翰

四川大学化工学院，成都 610065

收稿日期:2008-04-03 修回日期:2008-06-03 出版日期:2009-01-20 网络出版日期:2009-01-20

Effects of Acid on Synthesis of Mesoporous Titania

HE Jing-Ping, ZHANG Zhao, SHEN Jun, ZHANG Yu-Ting, CHEN Yao-Han

School of Chemical Engineering, Sichuan University, Chengdu 610065, China

Received:2008-04-03 Revised:2008-06-03 Published:2009-01-20 Online:2009-01-20

摘要/Abstract

摘要： 以硫酸和乙酸为酸度调节试剂，采用Sol-Gel过程和水热处理结合，在没有添加任何表面活性剂作模板剂的条件下，通过钛酸丁酯（TBOT）在酸性体系中的控制水解和自组装制备TiO₂介孔材料.产物采用XRD、N₂吸附-脱附等温线、TG-DSC进行分析表征.通过选择酸的种类和控制酸的浓度，添加配位抑制剂TEA减缓Ti的水解速率，可合成介孔纯TiO₂材料.使用硫酸（H₂SO₄∶TBOT＝1∶1，摩尔比）和TEA制备出比表面积为176m²/g，孔容为0.222cm³/g，平均孔径约5nm，孔径分布窄，热稳定性较好的TiO₂介孔材料.

关键词: 介孔TiO₂, 钛酸丁酯, 酸性水解, 表征

Abstract: The mesoporous titania was prepared via Sol-Gel process from Ti(n-C₄H₉O)₄(TBOT) without surfactant templates. Using sulfuric acid or acetic acid as acidity regulator, the TBOT was hydrolyzed in an acidic system, and then its hydrolysate was treated by hydrothermal method. The products were characterized by XRD, N₂ adsorption-desorption isotherm and TG-DSC. The results indicate that mesoporous TiO₂ can be synthesized through selecting acid, controlling acid concentration and supplementing TEA which can reduce the hydrolysis rate of TBOT. The mesoporous TiO₂, prepared with the mole ratio of H₂SO₄/TBOT/TEA＝1/1/1, shows a surface area of 176m²/g, pore volume of 0.222cm³/g, mean pore size of 5nm, and narrow pore size distribution, and its thermal stability is excellent.

Key words: TiO₂, tetrabutyl titanate, acidic hydrolysis, characterization

中图分类号:

O614

何菁萍,张昭,沈俊,张钰婷,陈垚翰. 酸对合成二氧化钛介孔材料的影响[J]. 无机材料学报, DOI: 10.3724/SP.J.1077.2009.00043.

HE Jing-Ping,ZHANG Zhao,SHEN Jun,ZHANG Yu-Ting,CHEN Yao-Han. Effects of Acid on Synthesis of Mesoporous Titania[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2009.00043.

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酸对合成二氧化钛介孔材料的影响

Effects of Acid on Synthesis of Mesoporous Titania

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