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TiO2 xerogels prepared by modified sol–gel method with ethylenediamine are photoactive for the 4-nitrophenol photoreduction

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Abstract

Amorphous and nanocrystalline TiO2 xerogel semiconductors were synthesized by sol–gel using different hydrolysis pH conditions with and without ethylenediamine as structural modifier. Blue-shift of the optical-electronic properties was observed for the amorphous TiO2 xerogel samples obtained in an alkaline hydrolysis medium. Different textural properties (specific surface area, N2 adsorption–desorption isotherm and pore size distribution) were promoted by the use of ethylenediamine for the amorphous TiO2 xerogel semiconductors, as well as high photocatalytic activity for the reduction of 4-nitrophenol. These results are discussed as function of the textural properties of the samples.

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Acknowledgments

This research was made with the support of CONACYT-SEP CB-2010-01 194451 Nanostructure Materials for Photocatalysis.

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Authors and Affiliations

  1. Depto. de Química, Área de Catálisis, Grupo ECOCATAL, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No 186, 09340, Mexico, D.F., Mexico

    Sandra Cipagauta & Ricardo Gómez

  2. CIIEMAD, Instituto Politécnico Nacional, Barrio la Laguna Ticomán, C.P. 07340, Mexico, D.F., Mexico

    Agileo Hernández-Gordillo

Authors
  1. Sandra Cipagauta
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  2. Agileo Hernández-Gordillo
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  3. Ricardo Gómez
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Correspondence to Agileo Hernández-Gordillo.

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Cipagauta, S., Hernández-Gordillo, A. & Gómez, R. TiO2 xerogels prepared by modified sol–gel method with ethylenediamine are photoactive for the 4-nitrophenol photoreduction. J Sol-Gel Sci Technol 72, 428–434 (2014). https://doi.org/10.1007/s10971-014-3453-y

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  • DOI: https://doi.org/10.1007/s10971-014-3453-y

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