Preparation and characterization of sulfonic acid-functionalized single-walled carbon nanotubes.
Preparation and characterization of sulfonic acid-functionalized single-walled carbon nanotubes.
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DOI：
10.1016/j.physe.2008.11.018
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发表时间：
2009-02
期刊：
影响因子：
--
通讯作者：
Luo Z
中科院分区：
文献类型：
--
作者：
Adams L;Oki A;Grady T;McWhinney H;Luo Z
报道了一种单壁碳纳米管功能化的策略。该合成包括将氟化的单壁碳纳米管转化为硫代衍生物，并辅以五硫化磷。然后将硫醇基定量氧化为磺酸基团。用X射线光电子能谱证实了硫醇前体的氧化程度，这被证明是非常有用的区分-SH和-SO3H与硫的化学位移2p(约.5 EV)。用红外光谱、热重分析和透射电子显微镜对功能化碳纳米管进行了进一步表征，发现氟碳纳米管、硫醇修饰的碳纳米管和磺酸修饰的碳纳米管的形貌发生了显著的变化。
A strategy for the functionalization of single-walled carbon nanotubes is reported. The synthesis involved the conversion of fluorinated single-walled carbon nanotubes to the thiolated derivative assisted by phosphorous pentasulfide. The thiol group is then quantitatively oxidized to the sulfonic acid group. The extent of oxidation of the thiol precursor is confirmed using X-ray photoelectron spectroscopy, which proved to be immensely useful to discriminate between the –SH and –SO3H with a chemical shift for the sulfur 2p (approx. 5 eV). The functionalized carbon nanotubes were further characterized by infrared spectroscopy, thermogravimetric analysis, and transmission electron microscopy which revealed a significant change in morphology between the fluoro carbon nanotubes, the thiol and sulfonic acid-modified carbon nanotubes.
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