Fabrication of tunable core-shell structured TiO2 mesoporous microspheres using linear polymer polyethylene glycol as templates

Yuming Cui, Lei Liu, Bo Li, Xingfu Zhou, Nanping Xu

科研成果: 期刊稿件文章同行评审

105 引用 (Scopus)

摘要

Mesoporous core-shell structured titanium dioxide (TiO2) microspheres were successfully prepared by a facile one-step hydrothermal method using polyethylene glycol (PEG, MW 2000) as the soft template. The products were characterized in light of the morphology and chemical composition using scanning electron microscopy, transmission electron microscopy, and X-ray powder diffraction (XRD) techniques. The XRD patterns show that the direct hydrothermal synthesized product is anatase titanium dioxide. The Brunauer-Emmett-Teller surface area is 113.8 m2/g, and the average pore size is 5.78 nm. In addition, the morphology evolution of core-shell structured titanium dioxide with the different hydrothermal times was also studied. Research shows that the shell morphology and the core size of the core-shell TiO2 spheres can be easily tuned by controlling the hydrothermal time through the Ostwald ripening process. A possible growth mechanism of the mesoporous core-shell structured TiO2 hollow microspheres was also proposed in this paper.

源语言英语
页(从-至)2434-3439
页数1006
期刊Journal of Physical Chemistry C
114
6
DOI
出版状态已出版 - 18 2月 2010

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