TY - JOUR
T1 - Antisolvent Precipitation for the Synthesis of Monodisperse Mesoporous Niobium Oxide Spheres as Highly Effective Solid Acid Catalysts
AU - Li, Cheng Chao
AU - Dou, Jian
AU - Chen, Luwei
AU - Lin, Jianyi
AU - Zeng, Hua Chun
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was cosupported by the National University of Singapore, GSK Singapore, and the King Abdullah University of Science and Technology, Saudi Arabia.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2012/3/20
Y1 - 2012/3/20
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/600271
UR - http://doi.wiley.com/10.1002/cctc.201100457
UR - http://www.scopus.com/inward/record.url?scp=84866749601&partnerID=8YFLogxK
U2 - 10.1002/cctc.201100457
DO - 10.1002/cctc.201100457
M3 - Article
SN - 1867-3880
VL - 4
SP - 1675
EP - 1682
JO - ChemCatChem
JF - ChemCatChem
IS - 10
ER -