燃烧法合成氧化铁催化剂制备碳纳米管

Preparation of Carbon Nano-tubes by Synthesizing Ferric Oxide Catalyst with Combustion Method

通过硝酸铁柠檬酸凝胶直接自蔓延燃烧反应制备氧化铁体粉末,使用热重-差热分析法(TG-DSC)分析凝胶的合成温度,比较凝胶的先驱体溶液中柠檬酸和硝酸铁的不同比例对氧化铁体粉末结构和形貌的影响,并以此法制备的氧化铁为催化剂制备碳纳米管。使用SEM,TEM对所制备的碳纳米管的结构和形貌进行表佂,XRD分析表明,使用稀盐酸和浓硝酸能有效的除去产物中残留的催化剂颗粒。

Ferric oxide powder was prepared by the self-spreading combustion of the ferric nitrate-citric acid gel, Thermogravimetric-differential thermal analysis （TG-DSC） was employed to analyze the synthesis temperature of the ferric nitrate-citric acid gel. The effect of different ferric nitrate citric acid ratio in the precursor solution on the structure and morphology of the ferric oxide powder was studied by scanning electronic micro scope （SEM）. Carbon nanotubes were prepared by chemical vapor deposition method using the ferric oxide powder as catalyst. The structure and morphology of the prepared carbon nanotubes were studied by transmis sion electron microscope （TEM） and SEM. X-ray diffraction analysis showed that the catalyst parlicle in the carbon nanotubes product could be eliminated by hydrochloric acid and nitric acid.