物理化学学报 >> 2009, Vol. 25 >> Issue (11): 2232-2236.doi: 10.3866/PKU.WHXB20091015

研究论文 上一篇    下一篇

反相微乳液法制备纳米氧化铝

朴玲钰, 刘祥志, 毛立娟, 鞠思婷   

  1. 国家纳米科学中心, 北京 100190
  • 收稿日期:2009-04-21 修回日期:2009-06-23 发布日期:2009-10-28
  • 通讯作者: 朴玲钰 E-mail:piaoly@nanoctr.cn

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 E-mail:piaoly@nanoctr.cn

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摘要：

采用由环己烷、聚乙二醇辛基苯基醚(TritonX-100)、正丁醇与水溶液构成的反相微乳液体系, 合成了纳米Al2O3粉体. 采用X射线衍射、扫描电子显微镜、透射电子显微镜、比表面积分析仪等表征手段, 分别对产物的结构、形貌、比表面积和孔容进行了表征, 该纳米Al2O3比表面积约450 m2·g-1(随反应参数不同发生变化), 均属γ-Al2O3, 粒径均匀, 颗粒直径小于10 nm. 考察了微乳液体系中水与表面活性剂的物质的量之比r0、表面活性剂与助表面活性剂的体积比φ、焙烧温度等关键因素对产物比表面积等物理性质的影响. 结果表明, 当r0=20, φ=0.5, 焙烧温度为500 ℃时, 可以得到大比表面积、高孔容、分散性好及粒径分布均匀的γ-Al2O3粉体.

关键词: 反相微乳液体系, γ-Al2O3, 纳米粒子, 比表面积, 孔容

Abstract:

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