UNSPECIFIED (1997) Preparation and characterization of high surface area alumina-titania solid acids. JOURNAL OF MATERIALS SCIENCE, 32 (21). pp. 5583-5592. ISSN 0022-2461

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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 degrees 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.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Journal or Publication Title:	JOURNAL OF MATERIALS SCIENCE
Publisher:	CHAPMAN HALL LTD
ISSN:	0022-2461
Date:	1 November 1997
Volume:	32
Number:	21
Number of Pages:	10
Page Range:	pp. 5583-5592
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/16256

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