Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (11): 2232-2236.doi: 10.3866/PKU.WHXB20091015

• ARTICLE • Previous Articles     Next Articles

Preparation of Nano-Alumina by Reverse Microemulsion Method

PIAO Ling-Yu, LIU Xiang-Zhi, MAO Li-Juan, JU Si-Ting   

  1. National Center for Nanoscience and Technology of China, Beijing 100190, P. R. China
  • Received:2009-04-21 Revised:2009-06-23 Published:2009-10-28
  • Contact: PIAO Ling-Yu


Al2O3 nanoparticles were prepared by reverse microemulsion method that uses cyclohexane, polyethylene glycol octylphenyl ether (TritonX-100), n-butylalcohol, and water. The structure, morphology, and specific surface area of the nano-alumina particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electronmicroscopy (TEM), and specific surface area analysis. The specific surface area of the nano-alumina particles was about 450 m2·g-1 (changing with different reaction parameters) and the crystal structure was γ-Al2O3. The particle size was smaller than 10 nm and very uniform. The effect of molar ratio of water to surfactant (r0), volume ratio of surfactant to assistant-surfactant (φ), and calcination temperature (T) on the characteristics of the product were studied. The results indicated that the nano Al2O3 powder with a high specific surface area, high pore volume, good dispersibility, and narrow particle size distribution was obtained at r0=20, φ=0.5, and T=500 ℃.

Key words: Reverse microemulsion system, γ-Al2O3, Nanoparticle, Specific surface area, Pore volume


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