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Study on the Formation Process of Spindle β-FeOOH Particles
Zhang Xia,Zhao Yan ,Zhang Caibei
Author NameAffiliationE-mail
Zhang Xia School of Science, Northeastern University, Shenyang 110004  
Zhao Yan Institute of Metal Research, Chinese Academy of Science, Shenyang 110016  
Zhang Caibei School of Science, Northeastern University, Shenyang 110004 zhangxia@imr.ac.cn  
Abstract:
The formation process of spindle 2-FeOOH particles obtained through the hydrolysis of FeCl3 solutions has been investigated by means of TEM and XRD. The effect of surfactant-Hexadecyl trimethyl ammonium bromide(CTAB) on this process has also been studied. The results show that growth of the needle-like pre-particles is based on the aggregation process, when there is no CTAB in the FeCl3 solution. Once CTAB was added, [2-FeOOH] nuclies would grow up through the diffusion mechanism. The2-FeOOH particles were smaller and uniform under the effect of CTAB. The spindle and needle-like 2-FeOOH particles with different axis ratios can be synthesized by controlling the reaction parameters such as the concentration of the original FeCl3 solution and aging temperature.
Key words:  Spindle, 2-FeOOH, Surfactant, CTAB, Formation process
FundProject:
纺锤形β-FeOOH的形成过程研究
张霞,赵岩,张彩碚*
摘要:
应用透射电镜技术观察了FeCl3水解形成纺锤形β-FeOOH过程中颗粒的形貌变化,发现纺锤形β-FeOOH颗粒是由针形初级粒子沿长轴聚集长大形成的.加入表面活性剂十六烷基三甲基溴化铵(CTAB)后,β-FeOOH 形成机制发生改变, β-FeOOH晶核通过扩散过程而长成纺锤形颗粒.CTAB的存在使β-FeOOH颗粒变小而且粒径更均匀.改变反应条件包括起始FeCl3的浓度、陈化温度,得到了纺锤形和针形、不同轴比的单分散β-FeOOH.
关键词:  纺锤形  β-FeOOH  表面活性剂  CTAB  形成过程
DOI:10.1088/1674-0068/17/5/613-617
分类号: