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以甲烷为碳源,双金属纳米颗粒Fe/Ru(1∶1)、Fe/Ru(1∶1)、Ru/Fe(1∶1)为催化剂,在含有加厚氧化层的硅基底上,于875~950℃制备纳米碳管,并用原子力显微镜(atomic force microscope———AFM)和拉曼光谱进行表征,发现随着反应温度的降低,3种催化剂的催化效果具有明显的不同程度的降低,最佳反应温度为925℃;所制备的纳米碳管都是单壁的,并且高度都约是1.25 nm;对催化剂进行预处理(925℃,1 min)后,其催化效果会有显著的提高,这对实现碳纳米管的定点生长具有重要的意义。
Using methane as carbon source, bimetallic nanoparticles Fe / Ru (1: 1), Fe / Ru (1: 1) and Ru / Fe Carbon nanotubes were prepared at 875-950 ℃ and characterized by atomic force microscope (AFM) and Raman spectroscopy. It was found that with the decrease of reaction temperature, the catalytic effects of the three catalysts were significantly reduced , The optimal reaction temperature is 925 ℃; the prepared carbon nanotubes are single-walled, and the height is about 1.25 nm; after the catalyst pretreatment (925 ℃, 1 min), the catalytic effect will be significant Increase, which is of great significance for the fixed-point growth of carbon nanotubes.