NDLI: High surface area sol–gel alumina

Content Provider	Springer Nature Link
Author	Padmaja, P. Warrier, K. G. K. Padmanabhan, M. Wunderlich, W.
Copyright 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 m$^{2}$/g is observed for 1:5 Al$_{2}$O$_{3}$/TiO$_{2}$ composition calcined at 400 °C, but the same composition when calcined at 1,000 °C, resulted in a surface area of 4 m$^{2}$/g, while 1:0.5 composition shows a specific surface area of 41 m$^{2}$/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.
Starting Page	88
Ending Page	96
Page Count	9
File Format	PDF
ISSN	09280707
Journal	Journal of Sol-Gel Science and Technology
Volume Number	52
Issue Number	1
e-ISSN	15734846
Language	English
Publisher	Springer US
Publisher Date	2009-06-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sol–gel Alumina–titania Nanocatalysts Porosity Nanotechnology Optical and Electronic Materials Inorganic Chemistry Ceramics, Glass, Composites, Natural Methods
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Chemistry Materials Chemistry Biomaterials Condensed Matter Physics Electronic, Optical and Magnetic Materials

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