磺酸功能化单壁碳纳米管的制备与表征
Preparation and characterization of sulfonic acid-functionalized single-walled carbon nanotubes.
作者信息
Adams Luqman, Oki Aderemi, Grady Tony, McWhinney Hylton, Luo Zhiping
机构信息
Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA.
出版信息
Physica E Low Dimens Syst Nanostruct. 2009 Feb;41(4):723-728. doi: 10.1016/j.physe.2008.11.018.
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 -SO(3)H 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.
报道了一种单壁碳纳米管功能化的策略。该合成过程包括在五硫化二磷的辅助下将氟化单壁碳纳米管转化为硫醇化衍生物。然后将硫醇基团定量氧化为磺酸基团。使用X射线光电子能谱确认硫醇前体的氧化程度，事实证明它对于区分-SH和-SO(3)H非常有用，硫2p的化学位移约为5 eV。通过红外光谱、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，结果显示氟碳纳米管、硫醇和磺酸修饰的碳纳米管之间在形态上有显著变化。
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