Zn(II)　can　efficiently　promote　the　catalytic　performance　of　imidazolium　salt　ionic　liquids　(imi-ILs)　for　the　chemical　fixation　of　CO2　into　epoxides.　To　obtain　sustainability,　immobilized　bifunctional　catalysts　containing　both　imi-ILs　and　Zn(II)　were　prepared　using　bimodal　mesoporous　silica　(BMMs)　as　carrier,　through　grafting　of　Zn(OAc)2　and　1-(trimethoxysilyl)propyl-3-methylimidazolium　chloride　(Si-imi)　separately　in　the　nanopores.　The　catalysts,　named　as　BMMs-Zn&ILs,　were　identified　as　efficient　catalysts　for　cycloaddition　reaction　of　CO2　into　epoxides　under　solvent-free　conditions.　BMMs-Zn&ILs　showed　good　catalytic　activity,　which　increased　with　the　increase　of　the　molar　ratio　of　Zn(II)　to　Si-imi.　As　a　comparison,　different　catalytic　systems　including　homogeneous　imi-IL,　BMMs-ILs　and　BMMs-Zn　were　studied　to　demonstrate　different　cooperation　behaviors.　Furthermore,　the　kinetics　studies　of　homogeneous　and　heterogeneous　bifunctional　catalysts　were　employed　to　confirm　the　differences,　as　well　as　to　support　the　proposed　cooperative　catalysis　mechanism　in　the　nanopores.