五羰基铁催化热解合成碳纳米管  

Catalysis Pyrolysis Synthesis of Carbon Nanotubes with Fe(CO)_5

作　　者：孙保民[1] 丁兆勇[1] 许秉浩[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206

出　　处：《人工晶体学报》2010年第4期936-940,944,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金项目(No.50676032);长江学者和创新团队发展计划资助(IRT0720)

摘　　要：以氧炔焰为热源,CO为碳源,五羰基铁为催化剂前驱体合成碳纳米管,通过场发射扫描电子显微镜(FE-SEM)和高分辨率透射电子显微镜(HR-TEM)对实验样品进行表征。为了详细研究合成时间对实验结果的影响,实验从1s到1200s共采取12个不同反应时间分析,发现碳纳米管在70s开始合成,从300s到600s是比较经济合理的合成时间。同时从合成时间着手,分析得到了碳纳米管的合成过程,即在前60s内仅是基板升温和催化剂与碳原子簇涂覆在基板上,然后才有碳纳米管的生成。并以此为依据,推测本方法碳纳米管的合成符合溶解-扩散-析出理论。Carbon nanatubes were synthesized using CO as the source of carbon,Fe（ CO） 5 as the catalyst precursor,and oxy-acetylene flame as the source of heat,and the samples were analyzed by field emission scanning electron microscope（ FE-SEM） and high resolution transmission electron microscopy （ HR-TEM）. In order to study the effect of sythesis time,the samples at different time from 1 s to 1200 s were detail study. The results indicated that carbon nanotubes begin to synthesize at 70 s of the sampling time,and the time from 300 s to 600 s are reasonable reaction time. The synthesis process of carbon nanotubes was also discussed by means of reaction time,which indicates that the first 60 s is only for temperature rising,catalyst particles and carbon atom clusters coating on the substrate,followed by the beginning of carbon nanotubes synthesis. Finally,based on the results,it can be concluded that the theory of dissolution-diffusion-precipitation is suitable for carbon nanotubes synthesis.

关 键 词：碳纳米管 催化热解 FE-SEM HR-TEM 合成机理 

分 类 号：O613.71[理学—无机化学]