Effects of alcohol content and calcination temperature on the textural properties of bimodally mesoporous titania

Jiaguo YU, Jimmy C. YU, Wing Kei HO, Mitch K.-P. LEUNG, Bei CHENG, Gaoke ZHANG, Xiujian ZHAO

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Abstract

Bimodally mesoporous titania was prepared by hydrolysis of titanium tetraisopropoxide in pure water or the EtOH-H2O mixed solution under ultrasonic irradiation. Effects of alcohol content and calcination temperature on the phase composition and porosity of bimodally mesoporous titania was investigated by thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface areas. The results showed that for all TiO2 powders calcined from 400 to 600 °C, the pore size distribution is bimodal with fine intra-particle pore diameter at maximum pore diameters of ca. 2-4nm and larger inter-particle pore diameter at maximum pore diameters of ca. 18-50nm. The EtOH/H2O molar ratios obviously influenced the crystallization, crystallite size, BET surface areas, porosity and morphology of the prepared TiO2 powders. Copyright © 2003 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)309-320
JournalApplied Catalysis A: General
Volume255
Issue number2
DOIs
Publication statusPublished - 2003

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Citation

Yu, J. G.; Yu, J. C.; Ho, W. K.; Leung, M. K. P.; Cheng, B.; Zhang, G. K.; Zhao, X. J. (2003). Effects of alcohol content and calcination temperature on the textural properties of bimodally mesoporous titania. Applied Catalysis A: General, 255(2), 309-320. doi: 10.1016/S0926-860X(03)00570-2

Keywords

  • Bimodally mesoporous titania
  • Titanium tetraisopropoxide
  • Hydrolysis
  • Calcination temperature
  • Water content
  • Porosity
  • Phase composition