Antisolvent Precipitation for the Synthesis of Monodisperse Mesoporous Niobium Oxide Spheres as Highly Effective Solid Acid Catalysts

Handle URI:
http://hdl.handle.net/10754/600271
Title:
Antisolvent Precipitation for the Synthesis of Monodisperse Mesoporous Niobium Oxide Spheres as Highly Effective Solid Acid Catalysts
Authors:
Li, Cheng Chao; Dou, Jian; Chen, Luwei; Lin, Jianyi; Zeng, Hua Chun
Abstract:
We have developed a low-cost reaction protocol to synthesize mesoporous Nb 2O 5-based solid acid catalysts with external shape control. In the synthesis, monodisperse glycolated niobium oxide spheres (GNOS) were prepared by means of a simple antisolvent precipitation approach and subsequently converted to mesoporous niobium oxide spheres (MNOS) with a large surface area of 312m 2g -1 by means of the hydrothermal treatment. The antisolvent acetone used to obtain GNOS was recovered through distillation at high purity. The obtained mesoporous MNOS were functionalized further with sulfate anions at different temperatures or incorporated with tungstophosphoric acid to obtain recyclable solid acid catalysts. These MNOS-based catalysts showed excellent performance in a wide range of acid-catalyzed reactions, such as Friedel-Crafts alkylation, esterification, and hydrolysis of acetates. As they are monodisperse spheres with diameters in the submicrometer range, the catalysts can be easily separated and reused. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Citation:
Li CC, Dou J, Chen L, Lin J, Zeng HC (2012) Antisolvent Precipitation for the Synthesis of Monodisperse Mesoporous Niobium Oxide Spheres as Highly Effective Solid Acid Catalysts. ChemCatChem 4: 1675–1682. Available: http://dx.doi.org/10.1002/cctc.201100457.
Publisher:
Wiley-Blackwell
Journal:
ChemCatChem
Issue Date:
20-Mar-2012
DOI:
10.1002/cctc.201100457
Type:
Article
ISSN:
1867-3880
Sponsors:
This work was cosupported by the National University of Singapore, GSK Singapore, and the King Abdullah University of Science and Technology, Saudi Arabia.
Appears in Collections:
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Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Cheng Chaoen
dc.contributor.authorDou, Jianen
dc.contributor.authorChen, Luweien
dc.contributor.authorLin, Jianyien
dc.contributor.authorZeng, Hua Chunen
dc.date.accessioned2016-02-28T08:00:26Zen
dc.date.available2016-02-28T08:00:26Zen
dc.date.issued2012-03-20en
dc.identifier.citationLi CC, Dou J, Chen L, Lin J, Zeng HC (2012) Antisolvent Precipitation for the Synthesis of Monodisperse Mesoporous Niobium Oxide Spheres as Highly Effective Solid Acid Catalysts. ChemCatChem 4: 1675–1682. Available: http://dx.doi.org/10.1002/cctc.201100457.en
dc.identifier.issn1867-3880en
dc.identifier.doi10.1002/cctc.201100457en
dc.identifier.urihttp://hdl.handle.net/10754/600271en
dc.description.abstractWe have developed a low-cost reaction protocol to synthesize mesoporous Nb 2O 5-based solid acid catalysts with external shape control. In the synthesis, monodisperse glycolated niobium oxide spheres (GNOS) were prepared by means of a simple antisolvent precipitation approach and subsequently converted to mesoporous niobium oxide spheres (MNOS) with a large surface area of 312m 2g -1 by means of the hydrothermal treatment. The antisolvent acetone used to obtain GNOS was recovered through distillation at high purity. The obtained mesoporous MNOS were functionalized further with sulfate anions at different temperatures or incorporated with tungstophosphoric acid to obtain recyclable solid acid catalysts. These MNOS-based catalysts showed excellent performance in a wide range of acid-catalyzed reactions, such as Friedel-Crafts alkylation, esterification, and hydrolysis of acetates. As they are monodisperse spheres with diameters in the submicrometer range, the catalysts can be easily separated and reused. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en
dc.description.sponsorshipThis work was cosupported by the National University of Singapore, GSK Singapore, and the King Abdullah University of Science and Technology, Saudi Arabia.en
dc.publisherWiley-Blackwellen
dc.subjectAlkylationen
dc.subjectHeterogeneous catalysisen
dc.subjectHydrolysisen
dc.subjectMesoporous materialsen
dc.subjectNiobiumen
dc.titleAntisolvent Precipitation for the Synthesis of Monodisperse Mesoporous Niobium Oxide Spheres as Highly Effective Solid Acid Catalystsen
dc.typeArticleen
dc.identifier.journalChemCatChemen
dc.contributor.institutionInstitute of Chemical and Engineering Sciences, ASTAR (Agency for Science Technology and Research), 1 Pesek Road, Jurong Island, Singapore 627833, Singaporeen
kaust.authorLi, Cheng Chaoen
kaust.authorDou, Jianen
kaust.authorZeng, Hua Chunen
kaust.grant.fundedcenterKAUST-NUS GCR Programen
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