活性中间相炭微球的制备及机理研究  

Preparation and activation mechanism of mesocarbon microbeads by KOH activation

作　　者：李铁虎[1] 常天杰[1] 冀勇斌[1] 王大为[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072

出　　处：《新型炭材料》2008年第4期374-377,共4页New Carbon Materials

基　　金：国家自然科学基金(50472081)~~

摘　　要：以中间相炭微球(MCMBs)为原料,采用KOH、K2CO3分别对MCMBs进行活化,比较活化效果,发现KOH是一种有效的活化剂。通过KOH活化制备出比表面积达2775m2/g的活性炭。对活性炭进行XRD、BET比表面积与SEM分析,发现活化后MCMBs的石墨微晶结构被破坏,所制得的活性炭是由无定形组织构成的。活化机理为一系列的化学反应与钾插入石墨微晶片层的共同作用。Mesocarbon microbeads （MCMBss） were activated by KOH and K2CO3 and were analyzed by X- ray diffraction, nitrogen adsorption and scanning electron microscopy. Results showed that the KOH activated MCMBss had a BET surface area of 2775 m2/g. They had an amorphous structure and graphite crystallites were destroyed by activation. The activation mechanism involves a series of chemical reactions and potassium intercalation.

关 键 词：中间相炭微球(MCMBs) 高比表面 活性炭 化学活化 

分 类 号：O613.71[理学—无机化学]