Pore-wall chemistry and photocatalytic activity of mesoporous titania molecular sieve films

被引:243
作者
Yu, JC [1 ]
Wang, XC
Fu, XZ
机构
[1] Chinese Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Environm Sci Program, Hong Kong, Hong Kong, Peoples R China
[3] Fuzhou Univ, Coll Chem & Chem Engn, Res Inst Photocatalysis, Fuzhou 350002, Peoples R China
关键词
D O I
10.1021/cm049955x
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Transparent zeolite-like mesoporous TiO2 nanocrystalline thin films with high photocatalytic activity were synthesized via a surfactant-templated method. The films were characterized by TGA-DTA, XRD, nitrogen adsorption, SEM, TEM, UV/vis, and FT-IR spectroscopy. The photocatalytic activity of the films was evaluated by photodecomposition of acetone in air at ambient conditions. It was found that thermal treatment resulted in surfactant elimination, framework solidification, as well as pore-wall crystallization of the mesoporous TiO2. The resulting zeolite-like mesoporous TiO2 nanocrystalline films had large specific surface areas (similar to100 m(2)/g), high porosity (similar to40%), extended band gap energy (similar to3.3 eV), tri-directional communicating pore systems, and enhanced photocatalytic activity. The optimum calcination temperature was found to be 500 degreesC, at which the film possessed a cubic ordered mesoporous structure and exhibited the highest photocatalytic activity. A comparison with a conventional TiO2 film (prepared from a sol-gel method) showed that the ordered mesoporous TiO2 nanocrystalline film (calcined at 500 degreesC) had over 2 times the specific photocatalytic activity as the conventional film. The high photocatalytic activity of zeolite-like mesoporous TiO2 thin films can be explained by the large specific surface area and the three-dimensionally connected mesoporous architecture.
引用
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页码:1523 / 1530
页数:8
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共 54 条
  • [1] General predictive syntheses of cubic, hexagonal, and lamellar silica and titania mesostructured thin films
    Alberius, PCA
    Frindell, KL
    Hayward, RC
    Kramer, EJ
    Stucky, GD
    Chmelka, BF
    [J]. CHEMISTRY OF MATERIALS, 2002, 14 (08) : 3284 - 3294
  • [2] Synthesis and characterization of hexagonally packed mesoporous tantalum oxide molecular sieves
    Antonelli, DM
    Ying, JY
    [J]. CHEMISTRY OF MATERIALS, 1996, 8 (04) : 874 - 881
  • [3] A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES
    BECK, JS
    VARTULI, JC
    ROTH, WJ
    LEONOWICZ, ME
    KRESGE, CT
    SCHMITT, KD
    CHU, CTW
    OLSON, DH
    SHEPPARD, EW
    MCCULLEN, SB
    HIGGINS, JB
    SCHLENKER, JL
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (27) : 10834 - 10843
  • [4] Surface and electronic structure of titanium dioxide photocatalysts
    Bilmes, SA
    Mandelbaum, P
    Alvarez, F
    Victoria, NM
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (42) : 9851 - 9858
  • [5] Brinker CJ, 1999, ADV MATER, V11, P579, DOI 10.1002/(SICI)1521-4095(199905)11:7<579::AID-ADMA579>3.3.CO
  • [6] 2-I
  • [7] From microporous to mesoporous molecular sieve materials and their use in catalysis
    Corma, A
    [J]. CHEMICAL REVIEWS, 1997, 97 (06) : 2373 - 2419
  • [8] Controlled formation of highly organized mesoporous titania thin films:: From mesostructured hybrids to mesoporous nanoanatase TiO2
    Crepaldi, EL
    Soler-Illia, GJDA
    Grosso, D
    Cagnol, F
    Ribot, F
    Sanchez, C
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (32) : 9770 - 9786
  • [9] Controlled formation of highly ordered cubic and hexagonal mesoporous nanocrystalline yttria-zirconia and ceria-zirconia thin films exhibiting high thermal stability
    Crepaldi, EL
    Soler-Illia, GJDA
    Bouchara, A
    Grosso, D
    Durand, D
    Sanchez, C
    [J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (03) : 347 - +
  • [10] Nanocrystallised titania and zirconia mesoporous thin films exhibiting enhanced thermal stability
    Crepaldi, EL
    Soler-Illia, GJDA
    Grosso, D
    Sanchez, M
    [J]. NEW JOURNAL OF CHEMISTRY, 2003, 27 (01) : 9 - 13