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Preparation of ZnO@TiO2 nano coreshell structure by the polymerized complex and sol-gel method
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2008, v.21 no.3, pp.237-243
(2008). Preparation of ZnO@TiO2 nano coreshell structure by the polymerized complex and sol-gel method. Analytical Science and Technology, 21(3), 237-243.
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Abstract
착체중합법과 sol-gel법을 이용하여 ZnO 나노입자 표면상에 TiO2 입자를 코팅한 나노 코아쉘 구 조를 제조하였다. 착체중합법으로 제조된 ZnO 입자는 평균입도가 약 100 nm, sol-gel법으로 제조된 TiO2 입자는 10 nm 이하의 크기로 각각 구성되었다. ZnO@TiO2 나노 코아쉘 구조의 평균입도는 약 150 nm 의 크기를 나타내었다. 착체중합법으로 제조된 구형의 ZnO 나노 입자는 콜로이드상의 TiO2 입자의 균일 한 표면흡착으로 인해 착체중합법으로 제조된 ZnO 입자의 입자간 응집이 크게 제어되었다. ZnO와 TiO2 의 이종 입자간의 표면전하는 pH 7 근처의 중성 영역에서 iso-electric point (IEP)의 차이로 인하여 − 로 대전된 TiO2와 + 로 대전된 ZnO 나노입자의 이종의 입자들이 쿨롱의 인력에 의해 서로간의 결합을 하 게 되고, 결합을 이룬 ZnO@TiO2 나노 코아쉘 구조가 표면 전하가 zero가 되어 발생하게 된다.
- keywords
- <TEX>$ZnO@TiO_2$</TEX>, nano coreshell structure, polymerized complex, sol-gel method
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