Facile construction of heterogeneous dual-ionic poly(ionic liquid)s for efficient and mild conversion of CO_(2)into cyclic carbonates  

作　　者：Guanqun Xie Jiaxiang Qiu Huadeng Li Hongbin Luo Shuo Li Yanbin Zeng Ke Zheng Xiaoxia Wang 

机构地区：[1]School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,China [2]School of Materials Science and Engineering,Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad Laminate,Dongguan University of Technology,Dongguan 523808,China

出　　处：《Journal of Environmental Sciences》2025年第3期177-187,共11页环境科学学报(英文版)

基　　金：supported by the Applied Basic Research Foundation of Guangdong Province(No.2019A1515110551);the Science Foundation for Distinguished Scholars of Dongguan University of Technology(No.196100041051).

摘　　要：In the context of peaking carbon dioxide emissions and carbon neutrality,development of feasible methods for converting CO_(2)into high value-added chemicals stands out as a hot subject.In this study,P[D+COO^(−)][Br^(−)][DBUH^(+)],a series of novel heterogeneous dual-ionic poly(ionic liquid)s(PILs)were synthesized readily from 2-(dimethylamino)ethyl methacrylate(DMAEMA),bromo-substituted aliphatic acids,organic bases and divinylbenzene(DVB).The structures,compositions and morphologies were characterized or determined by nuclear magnetic resonance(NMR),thermal gravimetric analysis(TGA),infrared spectroscopy(IR),scanning electron microscopes(SEM),and Brunauer-Emmett-Teller analysis(BET),etc.Application of the P[D+COO^(−)][Br^(−)][DBUH^(+)]series as catalysts in converting CO_(2)into cyclic carbonates showed that P[D+COO^(−)][Br^(−)][DBUH^(+)]-2/1/0.6was able to catalyze epiclorohydrin-CO_(2)cycloaddition the most efficiently.This afforded chloropropylene carbonate(CPC)in 98.4%yield with≥99%selectivity in 24 hr under solvent-and additive-free conditions at atmospheric pressure.Reusability experiments showed that recycling of the catalyst 6 times only resulted in a slight decline in the catalytic performance.In addition,it could be used for the synthesis of a variety of differently substituted cyclic carbonates in good to excellent yields.Finally,key catalytic active sites were probed,and a reasonable mechanism was proposed accordingly.In summary,this work poses an efficient strategy for heterogenization of dual-ionic PILs and provides amild and environmentally benign approach to the fixation and utilization of carbon dioxide.

关 键 词：Dual-ionic poly(ionic liquid)s CO_(2)cycloaddition EPOXIDES Cyclic carbonates Heterogeneous catalysts 

分 类 号：X701[环境科学与工程—环境工程]