不同晶态纳米Fe2O3的盐控合成
收稿日期: 2009-12-20
修回日期: 2010-03-02
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
Received date: 2009-12-20
Revised date: 2010-03-02
Online published: 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)
宋 军, 马振叶, 李 成, 吴如军 . 不同晶态纳米Fe2O3的盐控合成[J]. 无机材料学报, 2010 , 25(7) : 780 -784 . DOI: 10.3724/SP.J.1077.2010.09879
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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