三嗪基有机多孔材料的制备及其在碘吸附中的应用

Synthesis of porous organic materials and their use in iodine adsorption

三嗪基有机多孔材料(CTFs)材料一般都是采用离子热法或微波法合成,但是这两种方法都有它们的缺点,如反应条件苛刻,单体数量有限,且难以实现等,限制了其实际应用.基于此情况,开发了一种模块搭建的设计思路,在不使用模板剂的情况下,合成孔径可调的CTFs材料.首先,以2,4,6-三(4-溴苯基)-1,3,5-三嗪-2,4,6-三胺(TPTT)为中心,合成了系列富氮多孔有机聚合物(NT-POP-1-6);然后,在800℃温度下进行后续热处理,获得系列孔径可调的三嗪基有机多孔聚合物(NT-POP@800-1-6).NT-POP@800-1-6的BET表面积范围为475~736 m^2·g^(-1).该系列材料具有永久的孔隙度,其有机框架结构上含有大量可以成为有效吸附位点的氮原子.NT-POP@800-1-6在碘蒸气中表现出优异的快速吸附性能,4 h的吸附量可以达到56%~192%.

In general,porous carbon materials were prepared by ionothermal synthesis or microwave methods.But the two methods have their disadvantages,such as the demanding reaction conditions and the limited monomers. So it is difficult to achieve and apply. Herein,a building block design concept was developed which allowed us to the synthesis of tunable porous carbon materials containing triazine ring without the addition of any templates. A series of novel triazine-containing pore-tunable carbon materials（ NT-POP@ 800-1-6）,which was synthesized via pyrolysis of porous organic polymers（ POPs） without any templates. NT-POP @ 800-1-6 possessed moderate BET surface areas of 475 736 m2·g-1,had permanent porosity and plenty of nitrogen units in the skeletons as effective sorption sites,and display relatively rapid guest uptake of 56% 192% in iodine vapour in the first 4 h.