Synthesis of Mesoporous Titanium Dioxide without Using Organic Templates

Abstract

Abstract: Thermally stable mesoporous anatase TiO2 was prepared in the absence of organic templates via two-step hydrolysis of industrial titanyl sulfate solution to form mesoporous metatitanic acid followed by calcination at 500 ℃ for 2 h. The mesoporous TiO2 obtained has a surface area of 202.2 m2/g and an average pore diameter of 2.8 nm. TiO2 contains SO2-4 and shows superacid properties. The mesoporous material was characterized by various methods and the mechanism of formation of the mesoporous structure was discussed. Sulfuric acid adsorbed on pore walls of the mesoporous metatitanic acid is bonded to the free hydroxyl groups on the pore walls, which acts as a structural directing agent and pore structure support.

Key words: mesoporous titanium dioxide, titanyl sulfate, thermal stability, template, superacid

SHEN Jun, TIAN Congxue, ZHANG Zhao*. Synthesis of Mesoporous Titanium Dioxide without Using Organic Templates[J]. Chinese Journal of Catalysis, 2006, 27(11): 949-951.

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Synthesis of Mesoporous Titanium Dioxide without Using Organic Templates

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