Surface scattering and reflecting: the effect on light absorption or photocatalytic activity of TiO2 scattering microspheres

被引：37

作者：

He, Zuoli ^{[1
]}

Que, Wenxiu ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Elect Mat Res Lab, Sch Elect & Informat Engn, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 39期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

ANATASE TIO2; TITANIA PHOTOCATALYSTS; METHYL-ORANGE; DEGRADATION; NANOTUBES; NANOSTRUCTURES; PERFORMANCE; MECHANISM; ROUTE; WALLS;

D O I：

10.1039/c3cp52570h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this article, nanoplate-assembled flower-like TiO2 scattering microspheres were prepared via a microwave solvothermal process. X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, N-2 adsorption-desorption isotherms and UV-Vis spectroscopy were used to characterize the as-prepared TiO2 scattering microspheres. The results indicate that the scattering microspheres exhibit extremely high photocatalytic activity due to their unique structural and optical properties. Since the nanoplates are assembled on the surface of the microspheres, when the incident light irradiates the scattering surface, the light will be scattered. The scattered light has a longer optical path and thus is more easily absorbed. In addition, the doped F atoms lead to an enhancement of the surface acidity, thus increasing the adsorption of the reactant and improving visible light adsorption, thereby enhancing the number of photons available to take part in the photocatalytic reaction.

引用

页码：16768 / 16773

页数：6

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