Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (8): 2474.doi: 10.7503/cjcu20210221

• Physical Chemistry • Previous Articles     Next Articles

Zr-MOF Hollow Nanospheres Supported Ionic Liquid for CO2 Cycloaddition Reaction

LI Meiyan, CHEN Zijuan, WANG Shuhua(), CHEN Chao()   

  1. Key Laboratory of Jiangxi Province for Environment and Energy Catalysis,College of Chemistry,Nanchang University,Nanchang 330031,China
  • Received:2021-04-06 Online:2021-08-10 Published:2021-08-05
  • Contact: WANG Shuhua,CHEN Chao E-mail:shwang@ncu.edu.cn;chaochen@ncu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21961021);the Natural Science Foundation of Jiangxi Province, China(20202ACB203001)

Abstract:

Hollow nanosphere Void@UiO-66-Ⅰ and bulk UiO-66-Ⅰ were designed and prepared by post- synthetic modification(PSM) technique. Such two Zr-MOFs functionalized by quaternary ammonium salt possessed acid-base active sites and hydrogen bond donors. A series of characterization results demonstrated that the two catalysts were successfully synthesized and could be used to catalyze the cycloaddition reaction of CO2 and styrene oxide. Due to the quaternary ammonium salt of Void@UiO-66-Ⅰ with a large number of hydro-xyl groups and halogen anion, it could induce the epoxide ring-opening by hydrogen bond and nucleophilic attack of the iodide, promoting the reaction proceed smoothly. Moreover, the hollow structure of Void@UiO-66-Ⅰ was conducive to the mass transport. Therefore, it showed better catalytic performance than bulk UiO-66-Ⅰ catalyst for the reaction of CO2 and styrene oxide cycloaddition. Under optimal reaction conditions(120 ℃, initial CO2 pressure 1.2 MPa, 6 h), without solvent and co-catalyst, the yield and selectivity of styrene carbonate(SC) were 85.5% and 95.2%, respectively.

Key words: UiO-66, Hollow nanospheres, Quaternary ammonium salt, Post-synthetic modification, CO2 cycloaddition reaction

CLC Number: 

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