Multifunctional mesoporous materials with acid-base frameworks and ordered channels filled with ionic liquid: Synthesis, characterization and catalytic performance of Ti-Zr-SBA-15-IL

► A multifunctional Ti-Zr-SBA-15-IL materials were synthesized by post-grafting ionic liquid onto dual-metal doped SBA-15. ► The characterization indicated that the as-synthesized materials have acid-base inorganic frameworks and the ordered channels filling with ionic liquid. ► Weakly basic sites derived from the ionic liquid could co-exist with medium strong acid sites from the framework. ► The cooperative effect of acid-basic framework and ionic liquid enhanced catalytic activity for the cycloaddition of CO2 with epoxides.