Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel
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 c...
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| Format: | Book Section |
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Faculty of Science, Universiti Teknologi Malaysia
2009
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| _version_ | 1796854471981006848 |
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| author | Lee, Siew Ling |
| author_facet | Lee, Siew Ling |
| author_sort | Lee, Siew Ling |
| collection | ePrints |
| description | 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.
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| first_indexed | 2024-03-05T18:14:34Z |
| format | Book Section |
| id | utm.eprints-9010 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T18:14:34Z |
| publishDate | 2009 |
| publisher | Faculty of Science, Universiti Teknologi Malaysia |
| record_format | dspace |
| spelling | utm.eprints-90102017-08-14T04:39:08Z http://eprints.utm.my/9010/ Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel Lee, Siew Ling QD Chemistry 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. Faculty of Science, Universiti Teknologi Malaysia 2009-05 Book Section PeerReviewed Lee, Siew Ling (2009) Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel. In: 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 http://www.penerbit.utm.my |
| spellingShingle | QD Chemistry Lee, Siew Ling Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel |
| title | Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel |
| title_full | Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel |
| title_fullStr | Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel |
| title_full_unstemmed | Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel |
| title_short | Physical properties and catalytic behaviour of sulfate-vanadium modified silica-titania aerogel |
| title_sort | physical properties and catalytic behaviour of sulfate vanadium modified silica titania aerogel |
| topic | QD Chemistry |
| work_keys_str_mv | AT leesiewling physicalpropertiesandcatalyticbehaviourofsulfatevanadiummodifiedsilicatitaniaaerogel |