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450m2·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10nm.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.
Al2O3nanoparticles 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 electron microscopy（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 ℃.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2009年第11期2232-2236,共5页
Acta Physico-Chimica Sinica
基金
科技部重大研究计划项目(2006CB932606)
国家自然基金面上项目(50602008)
中科院院方向性项目(KJCX-YW-M03)
教育部归国留学人员科研启动基金(08111I12GJ)资助~~
