无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2013, Vol. 45 ›› Issue (8): 8-.

• 论文 • 上一篇    下一篇

连续法制备羟基化碳纳米管/氧化铁复合粒子研究

李勇波,马传国,李欣欣,万华妹   

  1. 桂林电子科技大学材料科学与工程学院,广西桂林 541004
  • 出版日期:2013-08-10 发布日期:2013-08-14

Preparation of hydroxylated carbon nanotubes/ferric oxide compound particles by continious process

 LI  Yong-Bo, MA  Chuan-Guo, LI  Xin-Xin, WAN  Hua-Mei   

  1. School of Material Science and Engineering, Guilin University of Electronic Technology,Guilin 541004,China
  • Published:2013-08-10 Online:2013-08-14

摘要: 首先采用Fenton试剂对碳纳米管(CNTs)进行羟基化处理,再分别用氨水、碳酸钠和尿素作沉淀剂直接将处理得到的母液中的Fe3+转变为氧化铁(Fe2O3)的前驱体,经350 ℃煅烧后得到了不同的羟基化CNTs/氧化铁复合粒子。利用SEM、TG-DSC以及XRD对不同复合粒子的形貌、热分解机理以及物相进行表征,并比较了它们的导电性。结果发现,3种沉淀剂沉淀得到的复合粒子中Fe2O3的纯度高、晶型完整,其中氨水法制得了晶粒尺寸为36.9 nm的α-Fe2O3,有一定程度的团聚现象,体积电阻率为4.8×105 Ω·cm;碳酸钠法制得了晶粒尺寸为28 nm的γ-Fe2O3,团聚现象严重,体积电阻率为5.1×105 Ω·cm;尿素法制得了晶粒尺寸为50.3 nm的α-Fe2O3,粒子分散均匀,体积电阻率为100 Ω·cm。

关键词: 碳纳米管, 羟基化, 氧化铁, 复合物

Abstract: Carbon nanotubes(CNTs)were firstly hydroxylated with Fenton reagent.Then the Fe3+ in the obtained mother liquor was directly converted into the precursor of ferric oxide(Fe2O3) with ammonia,sodium carbonate,and urea as precipi- tants,respectively.Different hydroxylated CNTs/Fe2O3 compound particles were finally obtained after calcined at 350 ℃.The morphology,thermal decomposition mechanism,and phase structure of the compound particles were characterized by SEM, TG-DSC,and XRD,respectively.In addition,their electrical conductivities were also investigated.Results showed that Fe2O3 in those compound particles had high purity and integrated crystalline structure; for ammonia precipitant,the α-Fe2O3 particles with crystallite size of 36.9 nm were obtained,and the compound particles were agglomerated to some certain extent with volume resistivity of 4.8×105 Ω·cm;for sodium carbonate precipitant,γ-Fe2O3 particles with crystallite size of 28 nm were obtained,and the compound particles were drastically agglomerated with volume resistivity of 5.1×105 Ω·cm;for urea precipitant, α-Fe2O3 with crystallite size of 50.3 nm was obtained,and the compound particles were homogeneous with volume resistivity of 100 Ω·cm.

Key words: carbon nanotube, hydroxylation, ferric oxide, compound particles

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