无机材料学报 ›› 2010, Vol. 25 ›› Issue (7): 780-784.DOI: 10.3724/SP.J.1077.2010.09879 CSTR: 32189.14.SP.J.1077.2010.09879

• 研究快报 • 上一篇    

不同晶态纳米Fe2O3的盐控合成

宋 军1, 马振叶1,2, 李 成1, 吴如军2   

  1. (1. 南京工业大学 材料化学工程国家重点实验室, 南京210009; 2. 南京师范大学 化学与环境科学学院, 南京210097)
  • 收稿日期:2009-12-20 修回日期:2010-03-02 出版日期:2010-07-20 网络出版日期:2010-06-10
  • 基金资助:

    National Natural Science Foundation of China (50702025); Natural Science Foundation of Jiangsu province (BK2009473); Natural Science Foundation of the Jiangsu Higher Education Institutions of China (08KJB430009); Youth Foundation of Nanjing University of Technology (39071014); Foundetion of State Key Laboratory of Materials-Oriented Chemical Engineering (KL09-13)

Synthesis of Ferric Oxide Nanoparticles with Controllable Crystal Phases by Salt-assisted Combustion Method

SONG Jun1, MA Zhen-Ye1,2, LI Cheng1, WU Ru-Jun2   

  1. (1. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China,2. College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 210097, China)
  • Received:2009-12-20 Revised:2010-03-02 Published:2010-07-20 Online:2010-06-10
  • Supported by:

    National Natural Science Foundation of China (50702025); Natural Science Foundation of Jiangsu province (BK2009473); Natural Science Foundation of the Jiangsu Higher Education Institutions of China (08KJB430009); Youth Foundation of Nanjing University of Technology (39071014); Foundetion of State Key Laboratory of Materials-Oriented Chemical Engineering (KL09-13)

摘要:

以Fe(NO3)3·9H2O为氧化剂, 聚乙二醇(PEG2000)为燃料, 采用KCl盐助燃烧法制备了不同晶态的纳米Fe2O3粒子, 并用HRTEM、XRD、LRS和BET对其形貌和结构进行了表征. 结果表明, 纳米Fe2O3的晶态(包括纯α-Fe2O3、 纯γ-Fe2O3以及α-Fe2O3和γ-Fe2O3混晶)可以通过调整KCl/NO3-的摩尔比来控制合成. 将惰性盐KCl引入到燃烧反应中, 可以制得粒径小、比表面大、均匀分散的γ-Fe2O3纳米粒子. 另外, 本实验也探索了惰性盐KCl的作用机理.

关键词: 纳米Fe2O3, 盐助燃烧法, 晶态

Abstract:

The salt-assisted combustion method was applied in synthesis of Fe2O3 nanoparticles by using Fe(NO3)3·9H2O, polyethylene glycol (PEG2000) and KCl as oxidant, fuel and salt, respectively. The products were characterized by HRTEM, XRD, LRS and N2 adsorption. It is found that the crystal phase (including α-Fe2O3, γ-Fe2O3 and the mixed phases of α-Fe2O3 and γ-Fe2O3) of Fe2O3 nanoparticles can be adjusted by changing the KCl/NO3- molar ratio. Addition of soluble inert KCl in the redox mixture solution for combustion synthesis results in the formation of well-dispersed γ-Fe2O3 nanoparticles and a drastic increase in the specific surface area from 21.96 to 102.35 m2/g. A mechanism was proposed to illustrate the possible formation process of different crystal phase nanoparticles with different character.

Key words: Fe2O3 nanoparticles, salt-assisted combustion, crystal phase

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