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Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation

A direct comparison between nanostructured Technische Universiteit Delft-1 (TUD-1) and Technische Universiteit Delft-Crystalline (TUD-C) as catalyst supports for molybdenum doped titania catalysts was carried out. The characterizations results showed that TUD-1 is a mesoporous amorphous silicate mat...

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Main Authors: Yee, Khai Ooi, Hussin, Faisal, Yuliati, Leny, Siew, Ling Lee
Format: Article
Published: IOP Publishing Ltd 2019
Subjects:
QD Chemistry
Online Access:http://eprints.utm.my/id/eprint/87697/
http://dx.doi.org/10.1088/2053-1591/ab12be
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spelling my.utm.876972020-11-30T13:08:59Z http://eprints.utm.my/id/eprint/87697/ Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation Yee, Khai Ooi Hussin, Faisal Yuliati, Leny Siew, Ling Lee QD Chemistry A direct comparison between nanostructured Technische Universiteit Delft-1 (TUD-1) and Technische Universiteit Delft-Crystalline (TUD-C) as catalyst supports for molybdenum doped titania catalysts was carried out. The characterizations results showed that TUD-1 is a mesoporous amorphous silicate material with high surface area and porosity. Meanwhile, TUD-C is an ordered mesoporous crystalline aluminosilicate matters featured high acidity. In fact, TUD-C was obtained from the modification of TUD-1 with the addition of aluminium isopropoxide as the zeolite precursor. The catalytic testing demonstrated TUD-1 supported 1 mol% molybdena doped titania was inactive for epoxidation of 1,2-epoxyoctane and showed moderate activity (18%-21% conversion yield) and selectivity (approximately 70%) in epoxidation reaction of 1,2-epoxycyclohexane (0.51 mmol) and styrene oxide (1.25 mmol). Meanwhile, TUD-C supported 1 mol% molybdena doped titania achieved remarkably higher conversion yield for 1,2-epoxyoctane (2.7 mmol), 1,2-epoxycyclohexane (4.8 mmol) and styrene oxide (6.2 mmol) respectively with 100% selectivity towards all 3 analytes under ambient condition with constant stirring. The results strongly indicated that high Bronsted and Lewis acidic sites existed within the TUD-C framework is the key factor for the exceptional oxidative capabilities for molybdena-titania catalysts. IOP Publishing Ltd 2019-04-10 Article PeerReviewed Yee, Khai Ooi and Hussin, Faisal and Yuliati, Leny and Siew, Ling Lee (2019) Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation. Materials Research Express, 6 (7). 074001-074001. ISSN 2053-1591 http://dx.doi.org/10.1088/2053-1591/ab12be DOI:10.1088/2053-1591/ab12be
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic QD Chemistry
spellingShingle QD Chemistry
Yee, Khai Ooi
Hussin, Faisal
Yuliati, Leny
Siew, Ling Lee
Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation
description A direct comparison between nanostructured Technische Universiteit Delft-1 (TUD-1) and Technische Universiteit Delft-Crystalline (TUD-C) as catalyst supports for molybdenum doped titania catalysts was carried out. The characterizations results showed that TUD-1 is a mesoporous amorphous silicate material with high surface area and porosity. Meanwhile, TUD-C is an ordered mesoporous crystalline aluminosilicate matters featured high acidity. In fact, TUD-C was obtained from the modification of TUD-1 with the addition of aluminium isopropoxide as the zeolite precursor. The catalytic testing demonstrated TUD-1 supported 1 mol% molybdena doped titania was inactive for epoxidation of 1,2-epoxyoctane and showed moderate activity (18%-21% conversion yield) and selectivity (approximately 70%) in epoxidation reaction of 1,2-epoxycyclohexane (0.51 mmol) and styrene oxide (1.25 mmol). Meanwhile, TUD-C supported 1 mol% molybdena doped titania achieved remarkably higher conversion yield for 1,2-epoxyoctane (2.7 mmol), 1,2-epoxycyclohexane (4.8 mmol) and styrene oxide (6.2 mmol) respectively with 100% selectivity towards all 3 analytes under ambient condition with constant stirring. The results strongly indicated that high Bronsted and Lewis acidic sites existed within the TUD-C framework is the key factor for the exceptional oxidative capabilities for molybdena-titania catalysts.
format Article
author Yee, Khai Ooi
Hussin, Faisal
Yuliati, Leny
Siew, Ling Lee
author_facet Yee, Khai Ooi
Hussin, Faisal
Yuliati, Leny
Siew, Ling Lee
author_sort Yee, Khai Ooi
title Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation
title_short Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation
title_full Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation
title_fullStr Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation
title_full_unstemmed Comparison study on Molybdena-Titania supported on TUD-1 and TUD-C synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation
title_sort comparison study on molybdena-titania supported on tud-1 and tud-c synthesized via sol-gel templating method: properties and catalytic performance in olefins epoxidation
publisher IOP Publishing Ltd
publishDate 2019
url http://eprints.utm.my/id/eprint/87697/
http://dx.doi.org/10.1088/2053-1591/ab12be
_version_ 1685578975614599168
score 13.211869

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