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TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol

Titanium silicalite (TS-1) loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst has been synthesized at various loadings of zirconium (2-20 wt%). Structure and properties of the samples were characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), Four...

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Main Authors: Prasetyoko, Didik, Ramli, Zainab, Endud, Salasiah, Nur, Hadi
Format: Article
Published: Elsevier 2005
Subjects:
Q Science (General)
QD Chemistry
Online Access:http://eprints.utm.my/id/eprint/12600/
http://dx.doi.org/10.1016/j.molcata.2005.06.070
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spelling my.utm.126002017-10-25T04:33:27Z http://eprints.utm.my/id/eprint/12600/ TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol Prasetyoko, Didik Ramli, Zainab Endud, Salasiah Nur, Hadi Q Science (General) QD Chemistry Titanium silicalite (TS-1) loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst has been synthesized at various loadings of zirconium (2-20 wt%). Structure and properties of the samples were characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), Fourier transform infrared (FTIR) and UV-vis diffuse reflectance (UV-vis DR) spectroscopy techniques. The monolayer dispersion capacity of zirconium on the TS-1 was found to be 0.65 Zr4+ nm-2 TS-1. The UV-vis DR spectroscopy showed that the tetrahedral coordination of the titanium was observed in all samples, while octahedral zirconium was only observed in the samples containing high amount of zirconium loading (10, 15 and 20 wt%). The TPR profiles suggested that the zirconium structure impregnated on the surface of TS-1 with high amount of zirconium loading (15 and 20 wt%) have a similar structure to sulfated zirconia calcined at 500 °C. Adsorption of pyridine onto the samples indicated that Brönsted acid sites are only present in samples with high sulfated zirconia loading, i.e. 15 and 20 wt%. As analyzed by XRD, the formation of Brönsted acid sites is due to the presence of disulfate species on the surface of TS-1. It has been demonstrated that samples with 15 and 20 wt% loadings of sulfated zirconia showed activity towards consecutive transformation of 1-octene to 1,2-octanediol through the formation of 1,2-epoxyoctane using aqueous hydrogen peroxide. Elsevier 2005-11 Article PeerReviewed Prasetyoko, Didik and Ramli, Zainab and Endud, Salasiah and Nur, Hadi (2005) TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol. Journal of Molecular Catalysis A : Chemical, 241 . 118 -125. ISSN 13811169 http://dx.doi.org/10.1016/j.molcata.2005.06.070 doi:10.1016/j.molcata.2005.06.070
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 Q Science (General)
QD Chemistry
spellingShingle Q Science (General)
QD Chemistry
Prasetyoko, Didik
Ramli, Zainab
Endud, Salasiah
Nur, Hadi
TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol
description Titanium silicalite (TS-1) loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst has been synthesized at various loadings of zirconium (2-20 wt%). Structure and properties of the samples were characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), Fourier transform infrared (FTIR) and UV-vis diffuse reflectance (UV-vis DR) spectroscopy techniques. The monolayer dispersion capacity of zirconium on the TS-1 was found to be 0.65 Zr4+ nm-2 TS-1. The UV-vis DR spectroscopy showed that the tetrahedral coordination of the titanium was observed in all samples, while octahedral zirconium was only observed in the samples containing high amount of zirconium loading (10, 15 and 20 wt%). The TPR profiles suggested that the zirconium structure impregnated on the surface of TS-1 with high amount of zirconium loading (15 and 20 wt%) have a similar structure to sulfated zirconia calcined at 500 °C. Adsorption of pyridine onto the samples indicated that Brönsted acid sites are only present in samples with high sulfated zirconia loading, i.e. 15 and 20 wt%. As analyzed by XRD, the formation of Brönsted acid sites is due to the presence of disulfate species on the surface of TS-1. It has been demonstrated that samples with 15 and 20 wt% loadings of sulfated zirconia showed activity towards consecutive transformation of 1-octene to 1,2-octanediol through the formation of 1,2-epoxyoctane using aqueous hydrogen peroxide.
format Article
author Prasetyoko, Didik
Ramli, Zainab
Endud, Salasiah
Nur, Hadi
author_facet Prasetyoko, Didik
Ramli, Zainab
Endud, Salasiah
Nur, Hadi
author_sort Prasetyoko, Didik
title TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol
title_short TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol
title_full TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol
title_fullStr TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol
title_full_unstemmed TS-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol
title_sort ts-1 loaded with sulfated zirconia as bifunctional oxidative and acidic catalyst for transformation of 1-octene to 1,2-octanediol
publisher Elsevier
publishDate 2005
url http://eprints.utm.my/id/eprint/12600/
http://dx.doi.org/10.1016/j.molcata.2005.06.070
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score 13.211869

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