【摘要】 以无水三氯化铁为催化剂前驱体,乙烯为碳源,采用浮游催化法成功大量合成铁填充型碳纳米管。系统地考察了催化剂输入浓度及载气种类对产物的影响。利用环境扫描电子显微镜、透射电子显微镜、X-射线衍射、拉曼光谱和振动磁强计等多种技术手段对产物进行了表征。结果表明:三氯化铁可以替代传统上惯用的有机金属化合物二茂铁作为催化剂前驱体,具有廉价、可控性好等优点,得到的碳纳米管内腔填充有连续的Fe纳米线;这些Fe填充纳米管具有超顺磁性。更多还原

【Abstract】 Large-scale in-situ synthesis of Fe-filled carbon nanotubes was achieved by chemical vapor deposition(CVD) with anhydrous FeCl3 as floating catalyst precursor and ethylene as carbon source.The effects of catalyst and carrier gas were studied.The as-grown products were characterized using SEM,TEM,XRD,Raman,and vibrating sample magnetometer techniques.It has been found that for the floating CVD technique,anhydrous FeCl3 is a good yet cheap catalyst precursor that is better than the traditional ferrocene catalyst in terms of the purity and filling ratio of the Fe-filled carbon nanotubes produced.The superparamagnetic property of the carbon nanotubes was also demonstrated by vibrating sample magnetometry.更多还原