Mild purification of multiwalled carbon nanotubes with increased selectivity for carbon impurity and residual metal removal
Mild purification of multiwalled carbon nanotubes with increased selectivity for carbon impurity and residual metal removal
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DOI：
10.1007/s42823-023-00667-0
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发表时间：
2023-12
期刊：
影响因子：
4.5
通讯作者：
Erdong Chen;Qiang Liu;Pan Wu;Jian He;Changjun Liu;Wei Jiang
中科院分区：
文献类型：
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作者：
Erdong Chen;Qiang Liu;Pan Wu;Jian He;Changjun Liu;Wei Jiang
在这项研究中，多壁碳纳米管（MWCNTs）的化学气相分解衍生的细化进行了研究。采用超声波预处理方法来解开与MWCNTs缠结的碳和金属杂质。预处理后的MWCNTs表现出轻微的C-O/C = O含量从8.9%下降到8.8%，伴随着sp3碳含量增加2.5%，表明温和的破坏性预处理方法。随后，利用CO2选择性氧化和盐酸蚀刻分别选择性地去除碳杂质和残留金属。所得完整MWCNT的产率为约85.65重量%，表明原始MWCNT的单向产率提高了19.91%。值得注意的是，残余金属含量经历了从9.95 ± 2.42重量%至1.34 ± 0.06重量%，去除率提高了15.68%。这些令人信服的研究结果突出了采用温和的纯化工艺生产多壁碳纳米管的潜力，展示了广阔的应用前景。
In this study, the refinement of Multiwalled Carbon Nanotubes (MWCNTs) derived from chemical vapor decomposition is investigated. An ultrasonic pretreatment method is employed to disentangle carbon and metal impurities intertwined with MWCNTs. The pretreated MWCNTs exhibit a marginal decrease in C–O/C = O content from 8.9 to 8.8%, accompanied by a 2.5% increase in sp3carbon content, indicating a mildly destructive pretreatment approach. Subsequently, selective oxidation by CO2and hydrochloric acid etching are utilized to selectively remove carbon impurities and residual metal, respectively. The resulting yield of intact MWCNTs is approximately 85.65 wt.%, signifying a 19.91% enhancement in the one-way yield of pristine MWCNTs. Notably, the residual metal content experiences a substantial reduction from 9.95 ± 2.42 wt.% to 1.34 ± 0.06 wt.%, representing a 15.68% increase in the removal rate. These compelling findings highlight the potential of employing a mild purification process for MWCNTs production, demonstrating promising application prospects.