Fe/Mo/MgO冻凝胶催化剂大规模合成单壁纳米碳管

Large-Scale Production of Single-Walled Carbon Nanotubes Using Fe/Mo/MgO Cryogel Catalyst

通过冷冻干燥法制备了高活性的Fe／Mo／MgO冻凝胶催化剂。在1000℃下用该催化剂催化裂解甲烷，大规模合成了高质量的单壁纳米碳管（SWNTs），利用SEM、TEM、HRTEM、TGA和Raman等分析手段对所制备的SWNTs进行了表征。结果表明，冷冻干燥法制备催化剂合成的粗产品中SWNTs含量高达56wt％，管径分布窄，在0．90～0，95nm之间，形态以束状为主。Fe／Mo／MgO催化剂极易被酸去除，提纯后的SWNTs纯度高达95％以上。

Highly active Fe/Mo/MgO catalyst was prepared by freeze drying method. Large-scale and high quality single-walled carbon nanotubes （SWNTs） were synthesized by catalytic decomposition of CH4/H2 at 1000℃. SEM, TEM, HRTEM, TGA and Raman spectroscopy were used to characterize SWNTs. The results show that the content of SWNTs is 56wt% in raw product, which is much higher than that using conventional drying method. The as-prepared SWNTs are usually bundles with a narrow diameter distribution between 0.90nm - 0.95nm. Fe/Mo/MgO catalyst is very easily removed by acid. After purification, the purity of the SWNTs can reach 95wt% .