B-Doped and NH2-functionalized SBA-15 with hydrogen bond donor groups for effective catalysis of CO2 cycloaddition to epoxides. Issue 19 (4th September 2020)

• Record Type: Journal Article
• Authors: Ye, Yifei; Li, Dazhi; Xu, Ping; Sun, Jianmin
• Is Part Of: Inorganic chemistry frontiers. Volume 7:Issue 19(2020)
• Page Start: 3636
• Page End: 3645
• Publication Date: 2020-09-04
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0qi00703j
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : The novel B-SBA-15-NH2 catalyst with Lewis acid–base properties and hydrogen bond donor groups exhibited good catalytic performance for CO2 conversion under metal- and solvent-free conditions. Abstract : Until recently, many metal-based catalysts have been developed for the cycloaddition reaction of CO2 with epoxides. However, the leaching of the active metal component would lead to various environmental problems. A novel nonmetal B-doped Lewis acid–base catalyst with hydrogen bond donor (HBD) groups (B-SBA-15-NH2 ) was prepared successfully through the hydrothermal process and post-modification. B-SBA-15-NH2 exhibited good catalytic performance for the CO2 cycloaddition reaction, and 95% yield of propylene carbonate and satisfied selectivity (98%) were achieved in the presence of the KI cocatalyst. The efficient catalytic activity of B-SBA-15-NH2 resulted from the synergistic effects of B and HBD groups, together with the functionalized –NH2 groups. B-SBA-15-NH2 also exhibited good generality with acceptable yields for the corresponding cyclic carbonates in the CO2 cycloaddition with various epoxides. Furthermore, the developed B-SBA-15-NH2 catalyst could be easily separated by centrifugation and reused for five runs without an obvious loss in activity. The good activity and stable reusability of the metal-free B-SBA-15-NH2 catalyst demonstrate that it is a promising green candidate catalyst in the field of CO2 conversion.