摘要
利用催化化学气相沉积法,以Fe-Ni双活性金属为催化剂来制备碳纳米管。其中,Fe-Ni双活性金属催化剂由柠檬酸络合法制得。催化剂的组成和碳纳米管的形貌分别用XRD和TEM来进行了表征。实验结果表明,由于催化剂中的活性成分Fe-Ni形成了固溶体,相互之间产生了协同作用,使得其催化性能大大提高,因而由其制备的碳纳米管的产率明显高于由单一活性金属Fe或Ni催化剂所制备碳纳米管的产率。特别当双活性金属催化剂中的Fe的摩尔百分含量为75%时,产率为最高,达到2000%(gCNTs/gcatalyst precursor.h),这约是相同制备条件下,由单一活性金属Fe或Ni所得到碳纳米管产率的6或4倍。
Carbon nanotubes （CNTs） were prepared by catalytic chemical vapor deposition using the Fe-Ni clual active metal catalyst macle by citric acicl complexation. The obtained CNTs morphology ancl the catalyst structure ancl component were characterized by the transmission electron microscopy ancl X--ray diffraction, respec- tively. The research results showed that the obtained CNTs yield from the Fe-Ni clual active metal catalyst was clearly higher （about six or four times） than that from the single Fe or Ni as the catalyst. Especially,the CNTs yield hacl its maximum （2000% gCNTs/gcntalyst precursor·h） when the Fe atomic percentage is 75% in Fe ancl Ni atoms. The reasons may be that the Fe ancl Ni in dual active metal catalyst at high temperature come into being al- loy and then enhance their catalysis results.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第11期1890-1892,1897,共4页
Journal of Functional Materials
基金
国家杰出青年基金资助项目(50588201)
四川省科技攻关计划资助项目(05GG009-003
2006Z02-006-1)
