Journal of Sol-Gel Science and Technology

, Volume 22, Issue 1, pp 99–107

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

  • Tessy Lopez
  • R. Gomez
  • E. Sanchez
  • F. Tzompantzi
  • L. Vera
Article

DOI: 10.1023/A:1011272521955

Cite this article as:
Lopez, T., Gomez, R., Sanchez, E. et al. Journal of Sol-Gel Science and Technology (2001) 22: 99. doi:10.1023/A:1011272521955

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 (Eg) 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 Eg and on the crystalline phases. The highest activity corresponds to the catalysts having the lowest Eg and more than one crystalline phases co-existing.

24-dinitroaniline decompositiontitania band gaptitania x-ray diffractiontitania sol-gel preparation

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Tessy Lopez
    • 1
  • R. Gomez
    • 1
  • E. Sanchez
    • 2
  • F. Tzompantzi
    • 2
  • L. Vera
    • 2
  1. 1.Department of ChemistryUniversidad Autonoma Metropolitana-IztapalapaDFMexico
  2. 2.Tecnologico de Estudios Superiores de EcatepecEcatepec Edo. de Mexico