RSC Advances p. 30697 - 30703 (2014)
Update date:2022-08-17
Topics:
Sheng, Xiaoli
Zhou, Yuming
Yang, Yongle
Zhang, Yiwei
Zhang, Zewu
Zhou, Shijian
Fu, Xiaoqin
Zhao, Shuo
Phosphotungstic acid (H3PW12O40) has been successfully loaded onto sulfonate-functionalized ionic liquid-modified mesoporous silica SBA-15 by total anion-exchange. The immobilized catalysts were characterized by XRD, N2 adsorption, TEM, and FTIR spectroscopy. Characterization results show that the mesopore structure of SBA-15 was maintained well even after surface modification and the subsequent anion-exchange step of [PW12O40]3- (PW). In comparison with the task-specific basic ionic liquid (1-(propyl-3-sulfonate) 3-methyl-imidazolium phosphotungstate), the obtained catalyst showed much higher efficiency in alkylation of o-xylene with styrene. More importantly, such an immobilized task-specific basic ionic liquid could be reused without significant loss of catalytic activity even after recycling six times. This journal is the Partner Organisations 2014.
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