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The Microemulsion Method for Preparing TiO2 Coated SiO2 Core-Shell Particles

Authors :: Xie, Jing
Mei, Le Fu
Liao, Li Bing
Lv, Guo Cheng
Xia, Zhi Guo
Du, Gao Xiang
Source :: Key Engineering Materials; March 2014, Vol. 602 Issue: 1 p59-62, 4p
Publication Year :: 2014
Abstract: In this paper, the monodisperse TiO<subscript>2</subscript> particles and TiO<subscript>2</subscript> coated SiO<subscript>2</subscript> core-shell particles were prepared by the method of microemulsion, and the phase and morphology of TiO<subscript>2</subscript> and TiO<subscript>2</subscript> coated SiO<subscript>2</subscript> core-shell structure particles were analyzed by using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). At the same time, the phase changes and morphology changes of the two different kinds of structural particles as the changes of sintering temperature were compared. The results show that when the TiO<subscript>2</subscript> particles were prepared by the method of microemulsion, the content of anatase TiO<subscript>2 </subscript>decreased gradually and the rutile TiO<subscript>2</subscript> increased gradually as the sintering temperature increases from 550 °C to 650 °C; the core-shell particles of TiO<subscript>2</subscript> coated SiO<subscript>2</subscript> prepared were anatase when the sintering temperature increases from 600 °C to 800 °C; all of the particles size were about 1μm, the monodispersity of the particles were optimal and the particles were coated evenly, smoothly. Keywords: TiO<subscript>2</subscript>; SiO<subscript>2</subscript>; core-shell structure