CVD法不同条件下制备的多壁碳纳米管的Fenton氧化改性  

Fenton Oxidation Modification of Multi-walled Carbon Nanotubes Prepared in Different Conditions by CVD Method

作　　者：李伟[1] 成荣明[1] 徐学诚[1] 陈奕卫[1] 孙明礼[1] 何为凡[1] 

机构地区：[1]华东师范大学纳米功能材料和器件应用研究中心,上海200062

出　　处：《化学通报》2005年第8期618-623,共6页Chemistry

基　　金：上海纳米科技专项基金资助项目 (0 2 5 2nm0 11)

摘　　要：碳纳米管经焙烧和稀硝酸纯化处理后,在相同的实验条件下,采用Fenton试剂产生的·OH分别对CVD法合成的两种制备条件不同的多壁碳纳米管进行氧化改性处理。红外光谱(FT IR)表明,改性后的两种碳管结构中都引入了羟基、羰基和羧基等含氧官能团。此外,由于制备条件不同,导致它们的石墨化程度、缺陷含量和抗氧化能力等性质也不同,因此CVD法制备条件能够对碳管Fenton氧化改性结果产生重要影响。机理分析表明,这些含氧官能团可以看作是具有强亲电性和强氧化性的·OH对碳管上缺陷位置和不饱和键进行攻击的结果。After purification pretreatment by heating in air and in dilute HNO3, in the same experimental conditions two kinds of multi-walled carbon nanotubes （MWNTs） were treated with Fenton＇ s reagents, which were synthesized in different preparation conditions by chemical vapor deposition （CVD） method. The results of UF-IR spectra indicated that the oxygen-containing functional groups such as hydroxyl groups, carbonyl groups and carboxyl groups could be brought into two kinds of MWNTs after Fenton oxidation modification treatment. In addition, the properties such as graphitization degree, defects＇ content and antioxidation ability are also different for the different preparation conditions. So the preparation conditions of MWNTs could affect intensively the results of Fenton oxidation modification. Finally, we discussed the possible mechanisms of reaction between hydroxyl radical and MWNTs by FFIR spectral changes before and after Fenton modification treatments were discussed. The possible mechanisms indicated that the existence of oxygen-containing functional groups could be viewed as outcome of attacks of hydroxyl radical （·OH ） with both the properties of oxidizability and electrophilic addition on defect sites and unsaturated bonds in the MWNTs sample.

关 键 词：多壁碳纳米管 FENTON试剂 ·OH 机理 氧化改性 制备条件 CVD法 含氧官能团 缺陷位置 石墨化程度 

分 类 号：O613.71[理学—无机化学]