The Preparation of Titania Nano Crystals and Silica- Titania Core-Shell Particles through Peptization Process
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Monodispersed silica-titania core-shell particles with a controllable thickness and crystallinity were prepared by a simple peptization process in an aqueous acidic solution without the use of any external additives such as polyelectrolytes, polymers, and surfactants. The crystallinity of the titania nanocrystals coated on core-shell particles was controlled by adjusting the pH of the reaction medium. The shell thickness was found to increase as the reaction temperature, time, and the amount of Ti source material were increased. As-prepared core-shell particles with a smooth surface roughness were transformed into coreshell particles covered with largely grown titania crystals with different phases depending on the heat treatment temperature. The morphology and phase development of the particles were characterized via SEM, TEM, and XRD.
Abstract
Monodispersed silica-titania core-shell particles with a controllable thickness and crystallinity were prepared by a simple peptization process in an aqueous acidic solution without the use of any external additives such as polyelectrolytes, polymers, and surfactants. The crystallinity of the titania nanocrystals coated on core-shell particles was controlled by adjusting the pH of the reaction medium. The shell thickness was found to increase as the reaction temperature, time, and the amount of Ti source material were increased. As-prepared core-shell particles with a smooth surface roughness were transformed into coreshell particles covered with largely grown titania crystals with different phases depending on the heat treatment temperature. The morphology and phase development of the particles were characterized via SEM, TEM, and XRD.
참고문헌 (20)
- B. Alince, , Colloids and Surfaces, 23(3), pp.199~210 (1987)
- Kazuhiro Akiyama, , Journal of the American Ceramic Society, 81(4), pp.1071~1073 (1998)
- Noureddine Abidi, , ACS Appl. Mater. Interfaces, 1(10), pp.2141~2146 (2009)
- D. Garoli, , Journal of Dermatological Science, 52(3), pp.193~204 (2008)
- Hyung Mi Sung-Suh, , Journal of Photochemistry and Photobiology, A: Chemistry, 163(1), pp.37~44 (2004)
- Yu Bai, , Nature materials, 7(8), pp.626~630 (2008)
- Gopal K. Mor, , J. Mater. Res, 19(2), pp.628~634 (2004)
- L.A. Harris, , Journal of the Electrochemical Society, 127(5), pp.1186~1188 (1980)
- P. J. Boddy, , Journal of the Electrochemical Society, 115(2), pp.199~203 (1968)
- Richard P.N. Veregin, , Journal of Imaging Science and Technology, 45(2), pp.174~178 (2001)
- Suo Hon Lim, , Langmuir, 24(12), pp.6226~6231 (2008)
- Xing-Cai Guo, , Langmuir, 15(17), pp.5535~5540 (1999)
- Akira Nakamura, , Dalton Trans, (3), pp.488~495 (1979)
- Suo Hon Lim, , Langmuir, 25(16), pp.9480~9486 (2009)
- Werner Stöber, , J. Colloid Interface Sci, 26(1), pp.62~69 (1968)
- Chen-Chi Wang, , Chem. Mater, 11(11), pp.3113~3120 (1999)
- Jingyu Wang, , CrystEngComm, 11(4), pp.564~566 (2009)
- Jean-Pierre Jolivet, "Metal Oxide Chemistry and Synthesis: From Solution to Solid State", pp.83~84 (2000), Wiley-VCH Publishers
- Zhu H.Y., , J. Am. Chem. Soc, 127(18), pp.6730~6736 (2005)
- Jingyu Wang, , Cryst. Growth Des, 10(5), pp.2185~2191 (2010)