纯化及活化对螺旋碳纳米纤维形貌及电化学容量的影响  

Effects of purification and activation on morphology and electrochemical capacity of carbon nanocoils

作　　者：王兰娟[1,2] 李春忠[2] 顾锋[2] 肖家治[1] 

机构地区：[1]中国石油大学重质油国家重点实验室,山东青岛266555 [2]华东理工大学超细材料制备与应用教育部重点实验室,上海200237

出　　处：《中国石油大学学报（自然科学版）》2009年第2期155-159,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家“863”计划项目(2006AA03Z358);国家自然科学基金重点项目(20706015,50703009);上海市重点实验室专项基金项目(07DZ22016);上海市纳米科技基金项目(0752nm010)

摘　　要：采用盐酸对乙醇火焰燃烧制备的螺旋碳纳米纤维(CNCs)进行纯化,用KOH对纯化后的CNCs进行活化,利用透射电子显微镜(TEM)和氮气自动吸附仪分析了纯化及活化对CNCs形貌及孔结构的影响,并考察了活化后CNCs电化学容量的变化。结果表明:盐酸纯化处理去除了CNCs中大部分催化剂颗粒,并使比表面积增加;活化后CNCs长度明显变短,比表面积显著增加,纤维壁也较活化前变得粗糙;活化后的CNCs电化学容量显著提高,比电容由未经处理时的40 F/g提高到107 F/g。Carbon nanocoils （CNCs）, prepared by the flame combustion of ethanol, were purified and activated sequentially with hydrochloric acid and KOH. The morphology and structure of CNCs were characterized by means of transmission electron microscopy （TEM） and N2 adsorption. The results show that most of the catalyst particles could be removed by hydrochloric acid and the CNCs specific surface area enlarged while the morphologies changed little. Short tube length and rough tube walls were obtained by an activating treatment of CNCs using KOH as activating agent and the specific surface area enlarged remarkably. The electrochemical capacity of activated CNCs is 107 F/g,which is much higher than 40 F/g of pristine carbon nanocoils.

关 键 词：螺旋碳纳米纤维 纯化 活化 超级电容器 电化学容量 

分 类 号：TQ127[化学工程—无机化工]