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High surface area sol–gel alumina–titania nanocatalyst

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Abstract

Alumina–titania mixed oxide nanocatalysts with molar ratios = 1:0.5, 1:1, 1:2, 1:5 have been synthesized by adopting a hybrid sol–gel route using boehmite sol as the precursor for alumina and titanium isopropoxide as the precursor for titania. The thermal properties, XRD phase analysis, specific surface area, adsorption isotherms and pore size details along with temperature programmed desorption of ammonia are presented. A specific surface area as high as 291 m2/g is observed for 1:5 Al2O3/TiO2 composition calcined at 400 °C, but the same composition when calcined at 1,000 °C, resulted in a surface area of 4 m2/g, while 1:0.5 composition shows a specific surface area of 41 m2/g at 1,000 °C. Temperature programmed desorption (of ammonia) results show more acidic nature for the titania rich mixed oxide compositions. Transmission electron microscopy of low and high titania content samples calcined at 400 °C, shows homogeneous distribution of phases in the nano range. In the mixed oxide, the particle size ranges between 10–20 nm depending on titania content. The detailed porosity data analysis contributes very much in designing alumina–titania mixed oxide nanocatalysts.

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Acknowledgment

P. Padmaja acknowledges the Council of Scientific and Industrial Research (CSIR) for a Research Fellowship.

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  1. P. Padmaja

    Present address: Bioceramics Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, 695012, Kerala, India

Authors and Affiliations

  1. Materials and Minerals Division, National Institute for Interdisciplinary Science and Technology (NIIST) [Formerly, Regional Research Laboratory], CSIR, Trivandrum, 695019, Kerala, India

    P. Padmaja & K. G. K. Warrier

  2. School of Chemical Sciences, Mahatma Gandhi University, Athirampuzha, Kottayam, 685650, Kerala, India

    M. Padmanabhan

  3. Department of Materials Science, Faculty of Engineering, Tokai University, Kitakaname 1117, Hiratsuka-shi, 259-1292, Kanagawa-ken, Japan

    W. Wunderlich

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  1. P. Padmaja
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  2. K. G. K. Warrier
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  4. W. Wunderlich
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Correspondence to P. Padmaja.

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Padmaja, P., Warrier, K.G.K., Padmanabhan, M. et al. High surface area sol–gel alumina–titania nanocatalyst. J Sol-Gel Sci Technol 52, 88–96 (2009). https://doi.org/10.1007/s10971-009-1998-y

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  • DOI: https://doi.org/10.1007/s10971-009-1998-y

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