Abstract

A study using a set of physicochemical methods has shown that treatment of single-wall carbon nanotubes synthesized by the electric arc method with an aqueous solution of hydrogen peroxide (followed by treatment with hydrochloric acid) and with a mixture of concentrated nitric and sulfuric acids leads to a decrease in the content of inorganic impurities in the bulk of the finished materials. The acid oxidizing mixture shows the highest performance in the process, causing splitting of the bundles of single-wall carbon nanotubes into separate nanotubes and formation of stable concentrated suspensions of the nanotubes in water and in an isopropanol–water mixture. Both kinds of liquid-phase oxidative treatment enhance the electrical conductivity of the nanotube arrays and exert no pronounced selective effect on single-walled carbon nanotubes depending on the electronic conductivity of molecules of this material.

中文翻译：

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液相氧化处理对单壁碳纳米管纯度，亲水性和结构及其阵列电导率的影响

摘要

使用一组物理化学方法进行的研究表明，用过氧化氢水溶液（随后用盐酸处理）以及浓硝酸和硫酸的混合物处理通过电弧法合成的单壁碳纳米管会导致减少了成品物料中无机杂质的含量。酸性氧化混合物在该过程中表现出最高的性能，导致单壁碳纳米管束分裂成单独的纳米管，并在水中和异丙醇-水混合物中形成稳定的纳米管浓缩悬浮液。