Effects of Acid on Synthesis of Mesoporous Titania

doi:10.3724/SP.J.1077.2009.00043

Abstract

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

CLC Number:

O614

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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