离子液体制备氮掺杂石墨化炭纳米囊及其CO_2捕获性能（英文）

Synthesis of nitrogen-doped graphitic carbon nanocapsules from a poly(ionic liquid) for CO_2 capture

利用离子液体为碳源,K_3[Fe(CN)_6]为催化剂成功制备了氮掺杂石墨化炭纳米囊。K_3[Fe(CN)_6]作为温和的催化剂可以使碳源石墨化并产生中空结构。产物是具有类胶囊结构的石墨化炭,其壳壁厚度和直径分别为6 nm和50 nm。Si O2纳米球的引入为产物提供了均一的介孔并提高了产物的比表面积。其比表面积从100.4提高到865.7 m^2·g^(-1)。高的比表面积为氮掺杂炭纳米囊对于CO_2吸附提供了有利的条件。

A poly （ ionic l iquid ） was prepared from an ionic liquid monomer that was obtained by the reaction of 1-v in y lim id -azole,4 -vinyl-benzene chloride with 2,6 -di-tert-butyl^-methylphenol. The p o ly（ ionic l iq u id） was mixed with Kg[ Fe（ CN） 6 ] and a 5 nm silica colloidal sol,carbonized at 900 益 fo r 4 h,and sequentially treated with HNO3 and NaOH to remove the iron and silica to obtain nitrogen-doped graphitic carbon nanocapsules. The iron and silica acted as a graphitization catalyst and template, respec-tively. The nitrogen-doped graphitic carbon nanocapsules have a diameter of 50 nm and a wall thickness o f 6 nm and have a high ad-sorption capacity and good recyclability for CO2 capture. The addition o f SiO2 nanoparticles in the synthesis significantly increasedthe specific surface area from 100 . 4 to 865 . 7 m2 ＊g-1 and the CO2 adsorption capacity from 0 . 76 to 2 . 14 mmol＊g- 1 .