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Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel

UNSPECIFIED (2009) Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel. In: UNSPECIFIED, (ed.) Proceedings of Second International Conference and Workshops on Basic and Applied Sciences & Regional Annual Fundamental Science Seminar 2009. Faculty of Science, Universiti Teknologi Malaysia, pp. 85-88. ISBN 978-983-9805-73-4

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Both vanadium and sulfate modified silica-titania aerogels have shown excellent catalytic performance as bifunctional catalysts in producing diols from 1-octene. Pyridine adsorption study revealed the increase of Brønsted acid sites in sulfated vanadium loaded silica-titania aerogel (SO4_V/ST) as compared to that of sulfated silica-titania aerogel (SO4/ST). This phenomenon could be resulted from synergy effect of co-existence of sulfate and vanadium on the surface of silica-titania. In contrast, no noticeable Brønsted acidity was detected in vanadium solely loaded silica-titania aerogel (V/ST). The catalyst results, however, showed that SO4/ST was a better bifunctional catalyst, followed by V/ST and SO4_V/ST. The formation of vanadium sulfate (VOSO4) may have retarded the catalytic activity of SO4_V/ST.

Item Type:Book Section
Uncontrolled Keywords:silica-titania aerogel, Brønsted acid sites, sulfate-vanadium modified, impregnation, bifunctional catalyst
Subjects:Q Science > QD Chemistry
ID Code:9010
Deposited By: Dr Siew Ling Lee
Deposited On:30 Jun 2009 07:34
Last Modified:11 May 2011 01:50

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