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High surface area sol-gel alumina-titania nanocatalyst

Publication Type : Journal Article

Publisher : Journal of Sol-Gel Science and Technology

Source : Journal of Sol-Gel Science and Technology, Volume 52, Number 1, p.88-96 (2009)

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Keywords : Acidic nature, adsorption, Alumina-titania, ammonia, Atmospheric temperature, Boehmite sol, Calcination, chemical analysis, data analysis, gelation, Gels, High surface area, Homogeneous distribution, Hybrid sol-gel, Mixed oxide, Molar ratio, Nano-catalyst, Nanocatalysts, Particle size ranges, Phase analysis, porosity, Sol-gel alumina, Sol-gel process, Sol-gels, Sols, Specific surface area, Surface analysis, Surface area, Temperature programmed desorption, Thermal properties, Thermodynamic properties, TiO, Titania content, Titanias, Titanium, Titanium dioxide, Titanium Isopropoxide, Titanium oxides, transmission electron microscopy, XRD

Campus : Amritapuri

School : School of Arts and Sciences

Department : Chemistry

Year : 2009

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. © 2009 Springer Science+Business Media, LLC.

Cite this Research Publication : P. Padmaja, K.G.K. Warrier, Prof. M. Padmanabhan, and W. Wunderlich, “High surface area sol-gel alumina-titania nanocatalyst”, Journal of Sol-Gel Science and Technology, vol. 52, pp. 88-96, 2009

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