氧化时间对多壁纳米碳管结构与性能的影响  

Effects of Oxidation Time on the Structure and Performance of Multi walled Carbon Nanotubes

作　　者：黄庆华[1] 严军国[1] 徐敏[1] 张惠平[1] 陈群[1] 

机构地区：[1]华东师范大学分析测试中心

出　　处：《应用化学》2005年第1期59-62,共4页Chinese Journal of Applied Chemistry

基　　金：上海市纳米专项基金(0252NM011);教育部优秀青年教师教学与科研奖励基金;上海市博士后基金资助项目

摘　　要：利用浓硫酸/浓硝酸的混合酸在超声条件下对多壁碳管(MWNT)进行氧化和切短,使碳管表面产生羧基和羟基等官能团。利用透射电镜(TEM)、电阻测定和1HNMR实验研究了碳管的长度、体积电阻率、总体氢含量等随氧化时间的变化。结果表明,氧化时间为10h时,既可以切短碳管和在碳管表面引入较多的活性基团,同时又能较好地保留碳管的原有性能。Multi walled carbon nanotubes(MWNTs) were oxidized and cut in a mixture of concentrated sulfuric and nitric acids under sonication to introduce carboxyl and hydroxyl groups onto MWNTs. TEM, resistance measurement and 1 H NMR were used to study the effect of oxidation on the length, resistivity and the amount of hydrogen in the oxidized MWNTs. The results show that 10 h of oxidation may be the most favorite condition to shorten the carbon nanotubes and introduce enough functional groups with inherent properties of MWNTs being remained as much as possible.

关 键 词：碳纳米管 氧化 透射电镜 核磁共振 电阻 

分 类 号：O613.7[理学—无机化学]