Antisolvent Precipitation for the Synthesis of Monodisperse Mesoporous Niobium Oxide Spheres as Highly Effective Solid Acid Catalysts
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ArticleDate
2012-03-20Online Publication Date
2012-03-20Print Publication Date
2012-10Permanent link to this record
http://hdl.handle.net/10754/600271
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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.Sponsors
This work was cosupported by the National University of Singapore, GSK Singapore, and the King Abdullah University of Science and Technology, Saudi Arabia.Publisher
WileyJournal
ChemCatChemae974a485f413a2113503eed53cd6c53
10.1002/cctc.201100457