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The Preparation of Titania Nano Crystals and Silica-Titania Core-Shell Particles through Peptization Process

Title
The Preparation of Titania Nano Crystals and Silica-Titania Core-Shell Particles through Peptization Process
Author
구상만
Keywords
Silica; Titania; Nanocrystals; Core-shell particles; Peptization
Issue Date
2013-11
Publisher
HANYANG UNIVERSITY PRESS
Citation
JOURNAL OF CERAMIC PROCESSING RESEARCH, 권: 14, 호: 3, 페이지: 327-331
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 core-shell 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.
URI
http://www.scopus.com.ssl/record/display.uri?eid=2-s2.0-84886769349&origin=inward&txGid=250bafd836fb6fca00a227d187531f8bhttp://hdl.handle.net/20.500.11754/53908
ISSN
1229-9162
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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