Tailored Design of Bicontinuous Gyroid Mesoporous Carbon and Nitrogen-Doped Carbon from Poly(ethylene oxide-b-caprolactone) Diblock Copolymers
Tailored Design of Bicontinuous Gyroid Mesoporous Carbon and Nitrogen-Doped Carbon from Poly(ethylene oxide-b-caprolactone) Diblock Copolymers
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DOI：
10.1002/chem.201702360
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发表时间：
2017-10-04
影响因子：
4.3
通讯作者：
Kuo, Shiao-Wei
中科院分区：
文献类型：
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作者：
Chu, Wei-Cheng;Bastakoti, Bishnu Prasad;Kuo, Shiao-Wei
以聚环氧乙烷-b-己内酯（PEO-b-PCL）二嵌段共聚物为软模板，合成了高有序介孔解析型酚醛树脂及相应的介孔碳材料。由于溶胶/PEO-b-PCL混合物中氢键相互作用的有趣平衡，发现自组装介孔酚醛树脂仅在40-70wt%的特定浓度范围内形成。此外，随着溶剂浓度的增加，介观结构从无序到旋转到圆柱形再到无序胶束结构的形态转变。在800℃的氮气气氛下煅烧，可以将双连续介孔结构的螺旋状酚醛树脂转化为具有大孔径的介孔碳，而不会破坏原有的介孔结构。此外，用三聚氰胺后处理介孔螺旋酚醛树脂得到具有独特电子性能的n掺杂介孔碳，实现了高CO2吸附容量（0℃时为6.72mmolg(-1)）。
Highly ordered mesoporous resol-type phenolic resin and the corresponding mesoporous carbon materials were synthesized by using poly(ethylene oxide-b-caprolactone) (PEO-b-PCL) diblock copolymer as a soft template. The self-assembled mesoporous phenolic resin was found to form only in a specific resol concentration range of 40-70wt% due to an intriguing balance of hydrogen-bonding interactions in the resol/PEO-b-PCL mixtures. Furthermore, morphological transitions of the mesostructures from disordered to gyroid to cylindrical and finally to disordered micelle structure were observed with increasing resol concentration. By calcination under nitrogen atmosphere at 800 degrees C, the bicontinuous mesostructured gyroid phenolic resin could be converted to mesoporous carbon with large pore size without collapse of the original mesostructure. Furthermore, post-treatment of the mesoporous gyroid phenolic resin with melamine gave rise to N-doped mesoporous carbon with unique electronic properties for realizing high CO2 adsorption capacity (6.72mmolg(-1)at 0 degrees C).