超大比表面积ACF和常规ACF表面结构比较

COMPARISON OF SURFACE MICROSTRUCTURE BETWEEN HSACF AND COMMON ACF

聚丙烯腈基超大比表面积 ACF(HSACF)与常规的小比表面积 ACF具有不同的表面结构。常规 ACF具有较为完善的微晶结构 ,含有比较丰富的杂原子官能结构 ,主要存在于骨架碳上的含氮官能团含量较大 ;而对于HSACF,超微粒子尺度减小 (类石墨微晶基本不存在 ) ,主要存在于骨架碳上的含氮官能团含量较小 ,杂原子官能结构的浓度和化学状态与常规 ACF大不相同 ,这些都使 HSACF具有与常规 ACF不同的纳米孔空间表面结构 ,造成二者吸附和催化活性的大不相同。

HSACF(PAN based ACF with ultra high S BET ) is of different surface microstructure from common PAN ACF. Compared with common PAN based ACF, HSACF possesses much larger S BET and pore volume, while, is provided with much less order micro structure (almost inexistence of graphite like micro crystalline structure), less surface functional groups, especially a much smaller amount of nitrogen containing surface functional group, which exists in very different chemical state from common ACF. It is the different surface microstructure that contributes to dissimilar chemical and physical properties of nano sized pore spaces of two kinds of PAN based ACF, and accordingly profound different performance in adsorption and catalysis activity.