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

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    Type
    Article
    Authors
    Li, Cheng Chao
    Dou, Jian
    Chen, Luwei
    Lin, Jianyi
    Zeng, Hua Chun
    Date
    2012-03-20
    Online Publication Date
    2012-03-20
    Print Publication Date
    2012-10
    Permanent link to this record
    http://hdl.handle.net/10754/600271
    
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    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.
    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
    Wiley
    Journal
    ChemCatChem
    DOI
    10.1002/cctc.201100457
    ae974a485f413a2113503eed53cd6c53
    10.1002/cctc.201100457
    Scopus Count
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