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Photocatalytic Activity in the 2,4-Dinitroaniline Decomposition Over TiO2 Sol-Gel Derived Catalysts

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Abstract

Titania was prepared by the sol-gel method from titanium alkoxide. Depending on the pH of the gelling solution, specific surface areas between 88 and 10 m2/g were obtained. The band gap (E g) of the samples was found between 3.05 and 3.32 eV. In samples gelled at pH5 and 9 and calcined at 400°C only anatase phase is observed, while for pH3 and pH7 brookite, anatase and rutile or anatase-rutile phases coexist. It was found that the photoactivity in the 2,4-dinitroanailine decomposition depends on the E g and on the crystalline phases. The highest activity corresponds to the catalysts having the lowest E g and more than one crystalline phases co-existing.

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Authors and Affiliations

  1. Department of Chemistry, Universidad Autonoma Metropolitana-Iztapalapa, P.O. Box 55,534, Mexico, 09340, DF

    Tessy Lopez & R. Gomez

  2. Tecnologico de Estudios Superiores de Ecatepec, Valle del Mayo s/n, Ecatepec Edo. de Mexico, CP 55210

    E. Sanchez, F. Tzompantzi & L. Vera

Authors
  1. Tessy Lopez
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  2. R. Gomez
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  3. E. Sanchez
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  4. F. Tzompantzi
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  5. L. Vera
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Lopez, T., Gomez, R., Sanchez, E. et al. Photocatalytic Activity in the 2,4-Dinitroaniline Decomposition Over TiO2 Sol-Gel Derived Catalysts. Journal of Sol-Gel Science and Technology 22, 99–107 (2001). https://doi.org/10.1023/A:1011272521955

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