TY - JOUR
T1 - Amphiphilic polyoxoniobate-based recoverable Pickering emulsion for effective oxidative desulfurization
AU - Liu, Huifang
AU - Liu, Chengpeng
AU - Zhen, Ni
AU - Dong, Jing
AU - Chi, Yingnan
AU - Hu, Changwen
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/4/25
Y1 - 2023/4/25
N2 - Recently, Pickering emulsions provide a green and efficient solution for interfacial catalysis. However, in an emulsion system the separation of products and the recycle of catalysts rely on time- and energy-consuming centrifugation and filtration. Herein, a straightforward emulsion assisted assembly strategy has been developed to fabricate amphiphilic polyoxoniobates (PONbs), [CnH2n+1N(CH3)3]6KHNb6O19/SiO2 (Cn-Nb6/SiO2; n = 14, 16, and 18). The honeycomb-like C16-Nb6/SiO2 composite not only can form stable Pickering emulsion in the n-octane/water system but also can effectively catalyze oxidative desulfurization under mild conditions. Notably, after the reaction, the oil phase and the emulsion phase were automatically separated: the clean oil was collected by decantation, while the recycled emulsion was directly used for the next run. Moreover, C16-Nb6/SiO2 is highly robust and can be consecutively used for up to eleven cycles with negligible loss of its catalytic activity.
AB - Recently, Pickering emulsions provide a green and efficient solution for interfacial catalysis. However, in an emulsion system the separation of products and the recycle of catalysts rely on time- and energy-consuming centrifugation and filtration. Herein, a straightforward emulsion assisted assembly strategy has been developed to fabricate amphiphilic polyoxoniobates (PONbs), [CnH2n+1N(CH3)3]6KHNb6O19/SiO2 (Cn-Nb6/SiO2; n = 14, 16, and 18). The honeycomb-like C16-Nb6/SiO2 composite not only can form stable Pickering emulsion in the n-octane/water system but also can effectively catalyze oxidative desulfurization under mild conditions. Notably, after the reaction, the oil phase and the emulsion phase were automatically separated: the clean oil was collected by decantation, while the recycled emulsion was directly used for the next run. Moreover, C16-Nb6/SiO2 is highly robust and can be consecutively used for up to eleven cycles with negligible loss of its catalytic activity.
KW - Amphiphilic polyoxoniobate
KW - Emulsion catalysis
KW - Interfacial assembly
KW - Oxidative desulfurization
KW - Recoverable Pickering emulsion
UR - https://www.scopus.com/pages/publications/85150829154
U2 - 10.1016/j.apcata.2023.119133
DO - 10.1016/j.apcata.2023.119133
M3 - Article
AN - SCOPUS:85150829154
SN - 0926-860X
VL - 656
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
M1 - 119133
ER -