以LaNi_5合金为催化剂制备碳纳米管的研究  

Synthesize Carbon Nanotubes by Using LaNi_5 Alloy Particles as Catalyst

作　　者：李顺华[1] 张海燕[2] 陈易明[2] 曾国勋[2] 

机构地区：[1]广东工业大学应用物理学院,广州510090 [2]广东工业大学材料与能源学院,广州510643

出　　处：《材料导报》2005年第2期106-108,共3页Materials Reports

基　　金：国家自然科学基金(No.20271014;No.50372013);广东省自然科学基金(No.000026;No.036918);广东省科技项目(No.2001A10702;No.2003A1070301);广州市科技项目(No.024G1070)

摘　　要：在800℃下,以 LaNi_2合金粉末为催化剂,乙炔为原料,采用化学气相沉积法(CVD)分别在氢气氛和氮气氛下合成了多壁碳纳米管。研究了以 LaNi_5合金粉末为催化剂的条件下,反应气氛对生成碳纳米管的影响,探讨了CVD 法生长碳纳米管的反应机理及 LaNi_5合金的催化机理。实验结果表明,反应过程中 LaNi_5分解为 La_3Ni_7和 Ni;在碳纳米管的生成过程中,La_3Ni_7进一步分解为 La 和 Ni。氢的参与能显著改变生成的碳纳米管的质量。Using LaNi_5 alloy micro-particles as catalyst multi-wall carbon nanotubes have been grown by chemical vapor deposition(CVD).The function of hydrogen and the mechanism of LaNi_5 as catalyst are studied and discussed in this paper.It's found in our experiments that the LaNi_5 micro-alloy particles were decompounded into nano-particles of Ni and La_3Ni_7 after treated in nitrogen and hydrogen atmosphere in the temperature from 550℃ to 700℃ and La_3Ni_7 were finally changed into La and Ni during the reaction.And it is also found that hydrogen played an important role in improving the quality of carbon nanotuhes.

关 键 词：LANI5 碳纳米管 催化剂制备 氢气氛 化学气相沉积法 分解 CVD法 反应过程 合金 乙炔 

分 类 号：TB383[一般工业技术—材料科学与工程] O562.1[理学—原子与分子物理]