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    • 6. 发明申请
    • METAL OXIDE HOLLOW NANOCAPSULE AND A METHOD FOR PREPARING THE SAME
    • 金属氧化物中空纳米颗粒及其制备方法
    • WO2008069561A1
    • 2008-06-12
    • PCT/KR2007/006269
    • 2007-12-05
    • SEOUL NATIONAL UNIVERSITY INDUSTRY FOUNDATIONHYEON, TaeghwanPIAO, YuanzheKIM, Jaeyun
    • HYEON, TaeghwanPIAO, YuanzheKIM, Jaeyun
    • C01F1/00C01G1/02B82B3/00A61K9/51B82B1/00
    • C01G49/04A61K9/5115A61K9/5192B82Y30/00C01B13/18C01F5/06C01F7/441C01G49/06C01P2002/72C01P2004/03C01P2004/04C01P2004/34C01P2004/62C01P2004/64C01P2004/90C01P2006/12C01P2006/17
    • The present invention relates to a metal oxide hollow nanocapsule which is able to disperse well in aqueous systems and a method for preparing thereof. The method for preparing the iron oxide hollow nanocapsules according to the present invention is characterized by dispersing metal oxyhydroxide in an aqueous solution and coating said metal oxyhydroxide with silica coating layer and administering heat treatment to form a metal oxide layer around the internal hollow space of the silica coating layer and removing said silica to obtain the metal oxide hollow nanocapsule. The iron oxide hollow nanoparticles prepared by the method of the present invention do not only have superior dispers ability in aqueous solutions and uniform size distribution, and said iron oxide hollow nanocapsule can also carry physiologically active materials within the hollow space of said nanocapsule. In addition, the iron oxide hollow nanocapsules of the present invention have a large surface area of at least 100 m2/g and narrow mesopore size distribution which allows physiologically active material carrying capability which brings great expectations for a wide range of industrial uses such as drug delivery vehicles for biomedical applications, gas sensors, lithium ion batteries, etc.
    • 本发明涉及能够在水性体系中良好分散的金属氧化物中空纳米胶囊及其制备方法。 根据本发明的制备氧化铁中空纳米胶囊的方法的特征在于将金属氢氧化物分散在水溶液中并用二氧化硅涂层涂覆所述金属羟基氧化物,并施加热处理以在内部中空空间周围形成金属氧化物层 二氧化硅涂层并除去二氧化硅,得到金属氧化物空心纳米胶囊。 通过本发明的方法制备的氧化铁中空纳米颗粒不仅在水溶液中具有优异的分散能力和均匀的粒度分布,并且所述氧化铁中空纳米胶囊还可以在所述纳米胶囊的中空空间内承载生理活性材料。 此外,本发明的氧化铁中空纳米胶囊具有至少100m 2 / g的大的表面积和窄的中孔尺寸分布,其允许生理活性物质携带能力,这对于广泛的工业用途如药物具有极大的期望 用于生物医学应用的输送车辆,气体传感器,锂离子电池等