作　　者： ; ; ; ; ; ;

机构地区： 西安科技大学

出　　处： 《人工晶体学报》 2013年第1期177-180,185,共5页

摘　　要： 采用浓硫酸与硝酸混酸对碳纳米管的进行了酸氧化处理,并采用TEM,FTIR和ESR对处理后的碳纳米管的形貌,官能团类型和电子自旋状态进行了表征。结果表明:酸处理能够切断碳纳米管,并且使其管径变小,同时可以使碳纳米管的C-C键发生断裂,产生-COOH。ESR图谱显示电子自旋谱的峰高比随酸处理时间增加而增加,意味着增加碳纳米管中未成对电子和导带电子数量有所增加。同时酸处理后的碳纳米管的g因子和线宽都随着酸处理时间增加而增加,g因子从2.012增加到2.018,线宽从19×10-4增加到26×10-4,意味着缺陷能够影响电子自旋状态。 The carbon nanotubes was acid treated by the mixture of sulfuric acid and nitric acid. The morphology, the type of function groups and electronic spin state were investigated by TEM, FTIR and ESR. The results show that carbon nanotubes can cut off by acid treatment, and the diameter of as treated carbon nanotubes is smaller than the initial one. At the same time C-C bonds can be transformed into - COOH. ESR spectra show that the number of unpaired electrons increased after acid treatment. While the g factor and line width increases with increasing of acid treatment time, g factor from 2. 012 to 2. 018, line width from 19×10 -4 to 26 × 10 -4. This means that defects can affect the electron spin state.

关 键 词： 碳纳米管 酸处理 电子自旋共振

领　　域： [理学] [理学]