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KMID : 0385520080210030237
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Analytical Science & Technology
2008 Volume.21 No. 3 p.237 ~ p.243
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Preparation of ZnO@TiO₂ nano coreshell structure by the polymerized complex and sol-gel method
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Lim Chang-Sung
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Abstract
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Nano core shell structures of TiO₂ particles coated on surface of ZnO nanoparticles were prepared by the polymerized complex and sol-gel method. The average particle size of ZnO by the polymerized complex method showed 100 ㎚ and the average particle size of TiO₂ by the sol-gel method showed below 10 ㎚. The average particle size of ZnO@TiO₂ nano core shell struture represented about 150 ㎚. The agglomeration between the ZnO particles using the polymerized complex method was highly controlled by the uniform absorption of TiO₂ colloid on the spherical ZnO surfaces. The driving force of heterogeneous bonding between ZnO and TiO₂ was induced by the Coulomb force. The ZnO and TiO₂ particles electrified with + and ? charges, respectively, resulted in strong bonding by the difference of iso-electric point (IEP) when they laid neutrality pH area, depending on the heterogeneous surface electron electrified by the different zeta potential on the pH values.
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KEYWORD
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ZnO@TiO₂, nano coreshell structure, polymerized complex, sol-gel method
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