一步法溶剂热催化合成纳米碳纤维

摘要

利用四氢呋喃为溶剂和碳源,通过溶剂热催化方法在500℃一步合成了纳米碳纤维,X-射线衍射(XRD)分析显示此法合成的碳纤维品型为碳的六方石墨相,场发射电镜(FESEM)和透射电镜(TEM)照片进一步表明碳纤维平均直径为100 nm,长度达几百纳米至几微米,高分辨电镜照片揭示产品中碳的晶间距为0.34 nm;产品纯度通过热重法(TGA)分析;同时,拉曼光谱图显示在1 347和1 584 cm-1处有2个强峰,这与石墨相碳的典型拉曼光谱图是一致的.%Carbon nanofibers have been synthesized through a one-pot catalytic solvothermal approach using tetrahydrofuran as the solvent and carbon source at 500℃. XRD patterns show that the as-prepared carbon nanofibers are of hexagonal graphite. Field-emission scanning electron microscopy(FESEM) and TEM images indicate that the carbon nanofibers have an average diameter of 100 nm and length ranging from hundreds of nanometers to several micrometers. High-resolution transmission electron microscopy (HRTEM) images reveal that the products consist of graphite layers with interlayer spacing of about 0.34 nm. The purity of the carbon nanofibers is also examined by thermal gravimetric analysis (TGA). The Raman spectrum has two strong peaks at 1347 and 1 584 cm-1,corresponding to the typical Raman peaks of graphitized carbon nanofibers.