Facile Synthesis and Photocatalysis of Size-Distributed TiO2 Hollow Spheres Consisting of {116} Plane-Oriented Nanocrystallites

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• 作者：Yuzhu Jiao ; Chengxin Peng ; Fangfang Guo ; Zhihao Bao ; Jinhu Yang ; Lukas Schmidt-Mende ; Ricky Dunbar ; Yao Qin ; Zifeng Deng
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：April 14, 2011
• 年：2011
• 卷：115
• 期：14
• 页码：6405-6409
• 全文大小：912K
• 年卷期：v.115,no.14(April 14, 2011)
• ISSN：1932-7455

文摘

TiO₂ hollow spheres consisting of highly active {116} plane-oriented crystallites have been synthesized with a wide diameter distribution from 20 nm to over 5 渭m via a facile emulsion method. The prepared hollow spheres possess large specific surface area (S_BET = 104 m²/g) and mesopores (15.7 nm), which could be further modified by Pt doping. The mechanisms for hollow sphere formation and {116} plane orientation are discussed briefly. Moreover, compared with normal TiO₂ hollow spheres, which usually exhibit uniform diameter distributions and no specific plane orientation, the typical TiO₂ hollow spheres with and without Pt doping exhibit good photocatalytic activities for phenol degradation under visible and UV light irradiation. The wide diameter (i.e., curvature) distribution, high specific surface area, conduciveness to forming mesoporous structures, and exposed high-energy surfaces allow good molecular infiltration and adsorption as well as photoelectroactivity and make them attractive for light harvesting.