Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (8): 1320-1328.DOI: 10.1016/S1872-2067(18)63040-2

• Special Column on the 15th International Conference on Carbon Dioxide Utilization (ICCDU XV) • Previous Articles     Next Articles

Novel hydrazine-bridged covalent triazine polymer for CO2 capture and catalytic conversion

Anhua Liu, Jinju Zhang, Xiaobing Lv   

  1. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2018-01-05 Revised:2018-02-02 Online:2018-08-18 Published:2018-07-04
  • Contact: 10.1016/S1872-2067(18)63040-2
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21406025), the China Postdoctoral Science Foundation (2014M551067), and the Start-Up Foundation of Dalian University of Technology (DUT13RC(3)58).

Abstract:

Carbon dioxide (CO2) capture and catalytic conversion has become an attractive and challenging strategy for CO2 utilization since it is an abundant, inexpensive, and renewable C1 resource and a main greenhouse gas. Herein, a novel hydrazine-bridged covalent triazine polymer (HB-CTP) was first designed and synthesized through simple polymerization of cyanuric chloride with 2,4,6-trihydrazinyl-1,3,5-triazine. The resultant HB-CTP exhibited good CO2 capture capacity (8.2 wt%, 0℃, and 0.1 MPa) as well as satisfactory recyclability after five consecutive adsorption-desorption cycles. Such a polymer was subsequently employed as a metal-free heterogeneous catalyst for the cyclo-addition of CO2 with various epoxides under mild and solvent-free conditions, affording cyclic carbonates with good to excellent yields (67%-99%) and high functional-group tolerance. The incorporation of hydrazine linkages into HB-CTP's architecture was suggested to play the key role in activating epoxides through hydrogen bonding. Moreover, HB-CTP can be reused at least five times without significant loss of its catalytic activity.

Key words: Covalent triazine polymer, Capture, Catalysis, Carbon dioxide, Cyclic carbonate