摘要
主要研究采用氨水对活性炭纤维ACF表面进行改性,制备了3种不同的改性ACF,测定ACF孔结构和表面酸碱基团,并测定了苯乙烯在改性ACF床层的吸附透过曲线,讨论了改性ACF的孔结构和表面酸碱基团对其吸附性能的影响。结果表明,与原始ACF相比,经氨水改性后的活性炭纤维ACF其表面碱性基团含量、孔容及其比表面积增加,从而明显提高了对苯乙烯的吸附容量;用浓度为6mol/L的氨水改性的ACF2其微孔孔容及其比表面积最大,其对苯乙烯的吸附容量也最大。
In this work,activated carbon fibers（ACFs）were respectively modified using different concentration ammonia aqueous solution,and the textural pvoperties and the surface oxygen content as well as the surface acidities of the modified ACFs studied were determined by nitrogen adsorption,elemental analysis and Boehm titration methods.The breakthrough curves of styrene in fixed beds packed separately with modified ACFs were determined.The effects of the pore structure and surface properties of modified ACFs on its adsorption capacities of styrene were discussed.Results showed that in comparison with original ACF,the modified ACFs had more surface basic groups,pore volume and higher surface area so that their adsorption capacities of styrene were improved.The ACF modified with 6mol/L ammonia aqueous solution had more micropore volume and higher surface area than the other modified ACFs,and thus its adsorption capacity of styrene was the highest.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第2期324-327,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(20576041)
