| Cite this article as: |
Xiaolan Tong, Hao Hu, Xingzhong Zhao, and Qidong Tai, In situ carbon coating for enhanced chemical stability of copper nanowires, Int. J. Miner. Metall. Mater., 29(2022), No. 3, pp. 557-562. https://doi.org/10.1007/s12613-021-2343-x
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赵兴中 E-mail: xzzhao@whu.edu.cn
台启东 E-mail: qdtai@whu.edu.cn
铜纳米线（CuNWs）具有成本低、导电性高、透明及柔韧性好等优点，且铜元素在地表储量丰富，是极为理想的电极材料，特别是用作于柔性及透明电极。然而铜纳米线稳定性差，极易被空气氧化和受化学环境腐蚀，这极大的限制了它们的实际应用。在本文中，我们提出了一种利用水热碳化方法在铜纳米线表面进行原位碳包覆的保护策略，可以有效地增强其化学稳定性。我们系统研究了影响碳膜生长的各种因素，包括葡萄糖前驱体浓度（碳源）、水热温度及水热时间等。我们发现在葡萄糖浓度为 80 mg·mL−1左右，水热温度为 160–170°C，水热时间为1–3 h的条件下，可以在铜纳米线表面均匀生长厚度为3–8 nm的碳膜。所制备的碳包覆铜纳米线（CuNWs@C）表现出优异的抗氧化和抗腐蚀稳定性，在光电子器件领域具有广阔的应用潜力。
Copper nanowires (CuNWs) are promising electrode materials, especially for used in flexible and transparent electrodes, due to their advantages of earth-abundant, low-cost, high conductivity and flexibility. However, the poor stability of CuNWs against oxidation and chemical corrosion seriously hinders their practical applications. Herein, we propose a facile strategy to improve the chemical stability of CuNWs by in situ coating of carbon protective layer on top of them through hydrothermal carbonization method. The influential factors on the growth of carbon film including the concentration of the glucose precursor (carbon source), hydrothermal temperature, and hydrothermal time are systematically studied. By tailoring these factors, carbon layers with thickness of 3–8 nm can be uniformly grown on CuNWs with appropriate glucose concentration around 80 mg·mL−1, hydrothermal temperature of 160–170°C, and hydrothermal time of 1–3 h. The as-prepared carbon-coated CuNWs show excellent resistance against corrosion and oxidation, and are of great potential to use broadly in various optoelectronic devices.
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