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


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Article Info

DATE

2001-09

AUTHORS

Tessy Lopez, R. Gomez, E. Sanchez, F. Tzompantzi, L. Vera

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. More... »

PAGES

99-107

References to SciGraph publications

  • 1994-01. Carbon monoxide oxidation on Pt/TiO2 sol-gel catalysts in JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
  • 1994-01. Formation of CdSxSe1−x microcrystals in sol-gel derived glasses in JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
  • 1995-11. Effect of hydrolysis catalyst on the Ti deficiency and crystallite size of sol-gel-TiO2 crystalline phases in JOURNAL OF MATERIALS RESEARCH
  • Identifiers

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    http://scigraph.springernature.com/pub.10.1023/a:1011272521955

    DOI

    http://dx.doi.org/10.1023/a:1011272521955

    DIMENSIONS

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