ZnO/SiO2 Nanocomposite Cryogels Prepared by Vacuum Freeze Drying

Li Fen Su; Lei Miao; Sakae Tanemura

doi:10.4028/www.scientific.net/MSF.663-665.1242

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HomeMaterials Science ForumMaterials Science Forum Vols. 663-665ZnO/SiO2 Nanocomposite Cryogels Prepared by Vacuum...

ZnO/SiO₂ Nanocomposite Cryogels Prepared by Vacuum Freeze Drying

Abstract:

In recent years, ZnO/SiO2 nanocomposite thin films have attracted much attention for a wide range of device applications based on their specific optical and electrical properties. Traditionally, the ZnO/SiO2 nanocomposites were prepared at the form of thin film because the ZnO/SiO2 nanocomposite gels are difficult to synthesize. Therefore, in the present study, a novel route of the mixed ZnO/SiO2 nanocomposite cryogels were prepared by sol-gel technology and dried by vacuum freeze drying. The wet gels were synthesized by co-precursor method with the precursors containing tetraethoxysilane [Si(OC2H5)4,TEOS] and zinc acetate [Zn(CH3COO)2.2H2O]. After vacuum freeze drying, the nanocomposites were annealed at different temperature. The properties of the resulting ZnO/SiO2 nanocomposite cryogels were characterized using Scanning Electron Microscopy (SEM), nitrogen absorption/desorption isotherms, thermogravimetric and differential scanning calorimeter (TG-DSC).

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Materials Science Forum (Volumes 663-665)

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1242-1246

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.663-665.1242

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November 2010

Authors:

Li Fen Su, Lei Miao, Sakae Tanemura

Keywords:

Sol-Gel Co-Precursor, Vacuum Freeze-Drying, ZnO/SiO₂ Cryogel

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