石墨化碳材料对苯蒸气吸脱附性能的研究  

Research of Graphite Carbons on Adsorption-Desorption Performance for Benzene Vapor

作　　者：朱玲玲[1,2] 朱玲[1] 李欣悦[1] 杨阳[1,2] 

机构地区：[1]北京石油化工学院环境工程系,北京102617 [2]北京工业大学环境与能源工程学院,北京100124

出　　处：《材料导报》2014年第16期72-76,共5页Materials Reports

基　　金：国家自然科学基金(21207006);北京市自然基金(KZ201410017019)

摘　　要：以苯酚和甲醛为碳前驱体,水合氧化钴为模板剂,采用模板-催化法合成了介孔石墨化碳材料。采用TG和FT-IR分析前驱体的热处理过程,XRD和Raman光谱分析材料结构,BET和TEM分析材料的微观形貌,评价了样品对苯蒸气的吸脱附性能,并对吸附穿透曲线进行拟合。结果表明:合成过程中模板剂的加入量以及模板剂是否去除对样品的比表面积、孔结构及吸附性能有很大的影响。CCo1样品石墨化结构最好,比表面积为287.638m2/g,孔径为19.075nm,吸附量为19.615μmol/g;CCo3样品中不仅含有石墨化碳还含有大量的Co氧化物,可能存在协同效应促进了吸附性能,其吸附量最大为34.615μmol/g,但脱附效率仅为89%。Graphite carbons with mesoporous structures were synthesized by a template-catalysis procedure, using hydrated cobalt oxide as template, phenol and formaldehyde as carbon source. TG and FT-IR were used to analyze the heat treatment process of precursor, XRD and Raman spectroscopy were used to analyze the crystal structure, BET and TEM were used to analyze the mierostructure, and the adsorption performances for benzene vapor were also evaluated. The results showed that molar amount of template to carbon source and removal of template had a great influence upon the specific surface area, pore structure and adsorption-desorption performance of samples. The specific surface area of CCol, with the best graphite structure, was 287. 638 m2/g, pore size was 19. 075 nm and adsorption capacity for benzene vapor was 19. 615 μmol/g. The synergistic effect between cobalt element and graphite carbons would affect the adsorption capacity of CCo3, which was 34. 615 μmol/g, but the desorption efficiency was only 89%.

关 键 词：石墨化碳 水合氧化钴 苯蒸气 吸脱附 拟合 

分 类 号：O643.36[理学—物理化学] TQ424.25[理学—化学]