Mass Production of High-Purity Semiconducting Carbon Nanotubes by Hydrochloric Acid Assisted Gel Chromatography
Mass Production of High-Purity Semiconducting Carbon Nanotubes by Hydrochloric Acid Assisted Gel Chromatography
复制标题
盐酸辅助凝胶色谱法批量生产高纯半导体碳纳米管
DOI：
10.1021/acsanm.8b01942
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发表时间：
2019-01-01
影响因子：
5.9
通讯作者：
Liu, Huaping
中科院分区：
文献类型：
--
作者：
Cui, Jiaming;Su, Wei;Liu, Huaping
高纯度半导体单壁碳纳米管（s-SWCNTs）的大量制备是其在电子和光电子器件中应用的关键。本文报道了一种利用酸辅助凝胶色谱法高效分离高纯度s-SWCNTs的方法，该方法利用盐酸（HCl）选择性氧化金属性单壁碳纳米管（m-SWCNTs），增强金属性和半导体性纳米管与凝胶的相互作用差异。具体地，洗脱液中的HCl浓度逐渐增加以逐步洗脱吸附在凝胶柱中的碳纳米管。首先在低HCl浓度下洗脱m-SWCNT，并且在较高HCl浓度下选择性地洗脱高纯度s-SWCNT。含有相对高含量的m-SWCNT和无定形碳杂质的最终残余物留在凝胶柱中。光学和电学表征证实，从各种原始SWCNT材料，特别是CoMoCAT（7，6）中提取的s-SWCNT的纯度大大提高。此外，多个单手性单壁碳纳米管首先从纯化的半导体CoMoCAT（7，6）纳米管分离。我们的工作为高纯度s-SWCNTs和单手性物种的质量分离提供了一种简单可控的方法，这将加速它们在电子学，光电子学和生物成像领域的应用。
Mass production of high-purity semiconducting single-wall carbon nanotubes (s-SWCNTs) is critical for their application in the electronic and optoelectronic devices. Here we reported a method for high-efficiency separation of high-purity s-SWCNTs with acid-assisted gel chromatography, in which hydrochloric acid (HCl) was used to selectively oxidize metallic SWCNTs (m-SWCNTs) and enhance the difference in the interaction of metallic and semiconducting nanotubes with gel. Specifically, the concentration of HCl in the eluent was gradually increased to elute the carbon nanotubes adsorbed in the gel column step by step. The m-SWCNTs were first eluted at a low HCl concentration, and high-purity s-SWCNTs were selectively eluted at a higher HCl concentration. The final residues containing a relatively high content of m-SWCNTs and amorphous carbon impurities were left in the gel columns. Optical and electrical characterizations confirmed that the purity of the s-SWCNTs extracted from various raw SWCNT materials, especially CoMoCAT (7, 6), was improved greatly. Moreover, multiple single-chirality SWCNTs were first separated from the purified semiconducting CoMoCAT (7, 6) nanotubes. Our present work provides a simple and controllable way for the mass separation of high-purity s-SWCNTs and single-chirality species, which would accelerate their application in the field of electronics, optoelectronics, and bioimaging.