沥青基中孔炭的制备及其吸附性能  

Preparation of Pitch Based Mesoporous Carbon and its Adsorption Behavior

作　　者：张建华[1] 乔松[1] 乔文明[1] 刘小军[1] 凌立成[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《材料科学与工程学报》2010年第5期716-720,共5页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(50730003;20977028);国家科技支撑资助项目(2007BAE55B00)

摘　　要：以煤焦油沥青为碳源,液相原位合成的MgCO3纳米颗粒为模板,一步法制备了中孔炭材料。利用氮气吸附-脱附实验,X射线衍射(XRD)和透射电子显微镜(TEM)对样品进行表征,并且研究了其对甲苯和维生素B12(VB12)的吸附性能。结果表明:制备的中孔炭材料孔径集中分布在2-10nm,且比表面积、孔容和中孔率最大分别达到530m2.g-1、0.92cm3.g-1和99%,中孔炭(PBMC-1.5)对甲苯分子和VB12分子的饱和吸附量分别达到801和275mg.g-1。Mesoporous carbons（MCs） were prepared with one-step process using coal-tar pitch as carbon precursors and in-situ synthesized MgCO_3 nanoparticles as templates.The as-prepared samples were characterized by N_2 adsorption analysis,X-ray diffractometry（XRD） and transmission electron microscopy（TEM）,and their adsorption properties to toluene and vitamin B_（12）（VB_（12）） were also investigated.Results indicate that the pore diameter of as-prepared MCs was mainly distributed in the range of 2-10nm,and the maximum surface area,largest pore volme and highest mesoporous ratio were up to 530m^2·g^（-1）,0.92cm^3·g^（-1） and 99%,respectively.The maximum adsorption capacities of mesoporous carbon（PBMC-1.5） to toluene and VB_（12） are 801 and 275mg·g^（-1）,respectively.

关 键 词：煤焦油沥青 中孔炭 孔径分布 吸附 

分 类 号：TQ424.19[化学工程]