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Citation: WANG Ying-Li, BAO Gai-Ling, ZHAI Yun-Pu, SU Yun-Lai. Preparation of Nanometer-Sized Fe₂O₃ in Sodium Dodecylbenzenesulfonate Microemulsion[J]. Chinese Journal of Applied Chemistry, ;2005, 22(12): 1329-1332. shu

Preparation of Nanometer-Sized Fe₂O₃ in Sodium Dodecylbenzenesulfonate Microemulsion

1.
Institute of Industrial Catalysis, Zhengzhou University, Zhengzhou 450052

Corresponding author: SU Yun-Lai,
Received Date: 26 January 2005
Available Online: 7 May 2005
Fund Project: 煤转化国家重点实验室基金(02/03)资助项目 (02/03)

Nanoparticles of ferric oxide prepared by traditional methods are easy to aggregate in water phase,which leads to a decrease in its catalytic activity.To solve the problem,nanoparticles of ferric oxide were(prepared) in an oil-water two-phase system.To prepare the microemulsion,dodecylbenzenesulfonic acid sodium(DBS),methylbenzene,and butanol were respectively used as surfacetant(S),oil phase(O),and consurfactant(A).The conductivity measurement results showed that dodecylbenzenesulfonic acid sodium microemulsion had the largest solubilization when V(A)/V(O)=0.25,and m(A)/m(S)=1.50,and the extraction rate of Fe(OH)₃ from the water phase into the oil phase is near 100% at pH=2.0~2.8.TG-DTA,XRD,H₂-TPR,FT-IR,and particle size analysis were used to characterize their microstructure,and the amorphous nanoparticles(17.1 nm) of Fe₂O₃ were found to exhibit a narrow size distribution.The H₂-TPR reduction peak temperature was siginificantly lower than that of the common ferric oxide.The major component of the powder usher was FeOOH,which was converted into Fe₃O₄ and finally into Fe₂O₃ with the increase of the calcination temperature,but aggregation phenomenon became evident when the temperature was increased further,and the best calcination temperature was 400℃.
- microemulsion,
- conductivity,
- rate of extraction,
- ferric oxide
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Preparation of Nanometer-Sized Fe₂O₃ in Sodium Dodecylbenzenesulfonate Microemulsion