Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols
Sulfated silica-titania aerogel (SO4/ST) catalyst was prepared by direct synthesis and modified with H2SO4 by wet impregnation method. Brønsted acid sites were generated after sulfation of the silica-titania aerogel with a pKa of -14.52. Consecutive transformation of 1-octene, catalyzed by sulfated...
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Elsevier B.V.
2008
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| Online Access: | http://eprints.utm.my/7346/ http://dx.doi.org/10.1016/j.jnoncrysol.2008.05.034 |
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| author | Ling, Lee Siew Hamdan, Halimaton |
| author_facet | Ling, Lee Siew Hamdan, Halimaton |
| author_sort | Ling, Lee Siew |
| building | UTM Library |
| collection | Institutional Repository |
| content_provider | Universiti Teknologi Malaysia |
| content_source | UTM Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | Sulfated silica-titania aerogel (SO4/ST) catalyst was prepared by direct synthesis and modified with H2SO4 by wet impregnation method. Brønsted acid sites were generated after sulfation of the silica-titania aerogel with a pKa of -14.52. Consecutive transformation of 1-octene, catalyzed by sulfated silica-titania aerogel using aqueous hydrogen peroxide as oxidant shows high activity towards 1,2-octanediol through the formation of 1,2-epoxyoctane. The formation of 1,2-octanediol is enabled by the co-existence of sulfated Ti species with Brønsted acid sites in the SO4/ST system. Sulfated silica-titania aerogel catalyst produced 1,2-octanediol (326 μmol) with selectivity of 63%. In contrast, no diol was produced when silica-titania aerogel was used. |
| format | Article |
| id | my.utm.eprints-7346 |
| institution | Universiti Teknologi Malaysia |
| publishDate | 2008 |
| publisher | Elsevier B.V. |
| record_format | eprints |
| spelling | my.utm.eprints-73462017-10-23T01:46:08Z http://eprints.utm.my/7346/ Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols Ling, Lee Siew Hamdan, Halimaton QD Chemistry Sulfated silica-titania aerogel (SO4/ST) catalyst was prepared by direct synthesis and modified with H2SO4 by wet impregnation method. Brønsted acid sites were generated after sulfation of the silica-titania aerogel with a pKa of -14.52. Consecutive transformation of 1-octene, catalyzed by sulfated silica-titania aerogel using aqueous hydrogen peroxide as oxidant shows high activity towards 1,2-octanediol through the formation of 1,2-epoxyoctane. The formation of 1,2-octanediol is enabled by the co-existence of sulfated Ti species with Brønsted acid sites in the SO4/ST system. Sulfated silica-titania aerogel catalyst produced 1,2-octanediol (326 μmol) with selectivity of 63%. In contrast, no diol was produced when silica-titania aerogel was used. Elsevier B.V. 2008-09-01 Article PeerReviewed Ling, Lee Siew and Hamdan, Halimaton (2008) Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols. Journal of Non-Crystalline Solids, 354 (33). pp. 3939-3943. ISSN 0022-3093 http://dx.doi.org/10.1016/j.jnoncrysol.2008.05.034 10.1016/j.jnoncrysol.2008.05.034 |
| spellingShingle | QD Chemistry Ling, Lee Siew Hamdan, Halimaton Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols |
| title | Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols
|
| title_full | Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols
|
| title_fullStr | Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols
|
| title_full_unstemmed | Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols
|
| title_short | Sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols
|
| title_sort | sulfated silica-titania aerogel as a bifunctional oxidative and acidic catalyst in the synthesis of diols |
| topic | QD Chemistry |
| url | http://eprints.utm.my/7346/ http://dx.doi.org/10.1016/j.jnoncrysol.2008.05.034 |
| url_provider | http://eprints.utm.my/ |