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0.80~0.95 nm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.
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