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<p>Carbon nanotubes (CNT) have attracted much attention due to their wide range of applications, but the complex and time-consuming preparation of CNT by the traditional chemical vapor deposition (CVD) method has limited their large-scale production. In this study, we propose an innovative “one-step” CNT growth process to simplify catalyst preparation. The significant advantage of this method is that it reduces the time consumption by 90% compared with other catalyst preparation methods. Aluminum foil was found to outperform other materials as a substrate and catalyst loading significantly affected the morphology and quality of CNT. High-density, low-defect, high-crystallinity, and high-quality CNT could be grown on aluminum foil at the optimal loading (e.g., 0.10&#xa0;mol/L.) In addition, the growth of CNT is affected synergistically by catalyst-substrate interfacial interactions, temperature, and aqueous solution content. In particular, CNT arrays with a diameter of 20&#xa0;nm were successfully prepared on an iron catalyst calcined at 660&#xa0;°C. These findings are important for large-scale, low-cost production of high-quality CNT.</p>

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Mechanism of carbon nanotube growth by Fe catalysts in a one-step process

  • 期刊论文

  • 发表日期：

    2025年2月15日

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  • Xinyue Zhao,
  • Xijun Zhang,
  • Chenyu Gao,
  • Peng Wang,
  • Yan He,
  • Dianming Chu,
  • Wenjuan Bai

摘要

Carbon nanotubes (CNT) have attracted much attention due to their wide range of applications, but the complex and time-consuming preparation of CNT by the traditional chemical vapor deposition (CVD) method has limited their large-scale production. In this study, we propose an innovative “one-step” CNT growth process to simplify catalyst preparation. The significant advantage of this method is that it reduces the time consumption by 90% compared with other catalyst preparation methods. Aluminum foil was found to outperform other materials as a substrate and catalyst loading significantly affected the morphology and quality of CNT. High-density, low-defect, high-crystallinity, and high-quality CNT could be grown on aluminum foil at the optimal loading (e.g., 0.10 mol/L.) In addition, the growth of CNT is affected synergistically by catalyst-substrate interfacial interactions, temperature, and aqueous solution content. In particular, CNT arrays with a diameter of 20 nm were successfully prepared on an iron catalyst calcined at 660 °C. These findings are important for large-scale, low-cost production of high-quality CNT.