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 BrÃ¸nsted 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 BrÃ¸nsted 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, BrÃ¸nsted acid sites, sulfate-vanadium modified, impregnation, bifunctional catalyst|
|Subjects:||Q Science > QD Chemistry|
|Deposited By:||Dr Siew Ling Lee|
|Deposited On:||30 Jun 2009 07:34|
|Last Modified:||11 May 2011 01:50|
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