高锰酸钾活化法制备红麻秆芯活性炭及其表征  

Preparation and characterization of activated carbon from kenaf core by potassium permanganate activation

作　　者：陈燕丹[1] 陈卫群[1] 黄彪[1] 

机构地区：[1]福建农林大学材料工程学院,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2012年第4期555-560,共6页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：国家自然科学基金资助项目(30972312;31000276);福建省高校杰出青年科研人才培育计划资助项目(JA11071)

摘　　要：以低浸渍比的KMnO4为活化剂高效活化红麻秆芯,制备了大比表面积和微孔结构发达的活性炭.探讨了活化温度、活化剂与原料的浸渍比、活化时间对活性炭的碘和亚甲基蓝吸附性能的影响.结果表明,低成本和高性能红麻秆芯活性炭的较佳制备条件为:浸渍比2%、活化温度800℃和活化时间120 min;该条件下活性炭的BET比表面积、总孔容、平均孔径分别为985.36 m2.g-1、0.54 cm3.g-1和1.09 nm.通过氮气吸附—脱附等温线、FT-IR、FE-SEM、EDX等手段对红麻秆芯活性炭的孔结构特征、表面官能团、显微形貌和元素组成进行了表征.结果显示,KMnO4活化法有望成为一种低成本、高效和环境友好的活性炭制备方法.Potassium permanganate was used as a new effective chemical activator for production of activated carbon from kenaf core, with large specific surface area and highly developed microporous structure. The effects of activation temperature, impregna- tion ratio and activation time on the iodine and methylene blue adsorption capacities of kenaf core derived activated carbon were eval- uated to optimize the activation process. Pore characteristics, surface functional groups, micro-morphology and element content were investigated with N2 adsorption-clesorption isotherms, FT-IR, FE-SEM and EDX analysis, respectively. The results showed that uti- lization of KMnO4 as an activating agent, at a rather low impregnation ratio, could be expected as a low-cest, efficient and green ap- proach for manufacture of activated carbons.

关 键 词：红麻秆芯 KMNO4 活性炭 孔结构 

分 类 号：X712[环境科学与工程—环境工程] S563.5[农业科学—作物学]