Citation:
Anhua Liu, Jinju Zhang, Xiaobing Lv. Novel hydrazine-bridged covalent triazine polymer for CO2 capture and catalytic conversion[J]. Chinese Journal of Catalysis,
;2018, 39(8): 1320-1328.
doi:
10.1016/S1872-2067(18)63040-2
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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.
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Keywords:
- Covalent triazine polymer,
- Capture,
- Catalysis,
- Carbon dioxide,
- Cyclic carbonate
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