Template-Free Fabrication of TiO2 Hollow Spheres and Their Photocatalytic Properties

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• 作者：Shuqin Shang ; Xiuling Jiao ; Dairong Chen
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：February 22, 2012
• 年：2012
• 卷：4
• 期：2
• 页码：860-865
• 全文大小：454K
• 年卷期：v.4,no.2(February 22, 2012)
• ISSN：1944-8252

文摘

Submicrometer-sized anatase TiO₂ hollow spheres were fabricated through a template-free solvothermal route using TiCl₄ as a raw material and a mixture of alcohols鈥揳cetone as solvent. Control of the hollow spheres鈥?size was achieved by adjusting the ratio of alcohols to acetone. Products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution TEM, X-ray photoelectron spectra (XPS), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and thermogravimetric (TG) analysis. It was found that the formation process of the TiO₂ hollow spheres might include the hydrolysis of Ti(IV) with the water formed from the solvothermal etherification reaction, the aggregation of the anatase TiO₂ nanoparticles, and the Ostwald ripening. Furthermore, the as-prepared TiO₂ hollow nanostructures exhibited good photocatalytic activity for the degradation of phenol.

Keywords:

TiO₂; hollow spheres; nanostructures; template-free fabrication; photocatalysis