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

作　　者：罗君航[1] 张孝彬[1] 李昱[1] 程继鹏[1] 糜裕宏[1] 刘芙[1] 

机构地区：[1]浙江大学硅材料国家重点实验室,浙江杭州310027

出　　处：《材料科学与工程学报》2006年第4期561-564,共4页Journal of Materials Science and Engineering

基　　金：高等学校博士学科点专项科研基金资助项目(20030335071)

摘　　要：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% .

关 键 词：冷冻干燥法 单壁纳米碳管 化学气相沉积 

分 类 号：O613.71[理学—无机化学]