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Journal of Materials Science

, Volume 32, Issue 21, pp 5583–5592 | Cite as

Preparation and characterization of high surface area alumina-titania solid acids

  • G. S WALKER
  • E WILLIAMS
  • A. K BHATTACHARYA
Article

Abstract

As part of a systematic study of solid acids, a series of high surface area single-phase alumina-titania mixed oxides were prepared. These materials were found to have higher surface areas, greater porosity and enhanced specific surface acidity than comparable alumina-titania solid acids reported in the literature. The thermal stability of the phases and their textural and physicochemical properties have been studied over a range of Al/Ti compositions and for calcinations up to 1000°C. The samples were characterized by differential thermal analysis-thermogravimetry, X-ray diffraction, nitrogen physisorption and X-ray photoelectron spectroscopy. Surface acidity was measured by temperature programmed desorption and in situ Fourier transform-infrared spectroscopy, using ammonia as a probe molecule. The strength and density of the acid sites were proportional to the Ti-content.

Keywords

Rutile Acid Site Mixed Oxide Boehmite Solid Acid 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • G. S WALKER
    • 1
  • E WILLIAMS
    • 1
  • A. K BHATTACHARYA
    • 1
  1. 1.Centre for Catalytic Systems and Materials Engineering, Department of EngineeringUniversity of WarwickCoventryUK

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