多孔阳离子共价三嗪骨架材料的制备及其二氧化碳吸附性能研究

Porous cationic covalent triazine frameworks for efficient CO2 adsorption

以咪唑阳离子化合物为有机单体,通过调节催化剂浓度,在离子热条件下制备了两种多孔阳离子共价三嗪骨架材料(Covalent Triazine Frameworks,CTFs,CTF-1和CTF-2).CTF-1和CTF-2的BET比表面积和孔体积分别为516 m2·g-1和0.32 cm3·g-1,599 m2·g-1和0.40 cm3·g-1.聚合物CTF-2表现出更高的BET比表面积和孔体积.此外,CTF-2的二氧化碳吸附值也相对较高为43.4 cm3·g-1.研究表明,在ZnCl2浓度相对较高时,聚合物显示出更高的BET比表面积、更大的孔体积以及更高的二氧化碳吸附能力.

By adjusting the catalyst concentration,two new porous cationic covalent triazine frameworks(CTFs,CTF-1 and CTF-2)were prepared under ionothermal conditions by using imidazole cationic compounds as organic monomers.The BET specific surface area and pore volume of CTF-1 and CTF-2 were 516 m2·g-1 and 0.32 cm3·g-1,599 m2·g-1 and 0.40 cm3·g-1,respectively.Polymer CTF-2 showed higher BET specific surface area and pore volume.In addition,the CO2 adsorption value of CTF-2 is relatively high,which is 43.4 cm3·g-1.The results show that the polymer exhibits higher BET specific surface area,larger pore volume and higher CO2 adsorption capacity when ZnCl2 concentration is relatively high.