Enhanced photocatalytic activity of silica-embedded TiO2 hollow microspheres prepared by one-pot approach

被引：40
作者：
Li, Gang [1 ]
Liu, Fang [1 ]
Zhang, Zhao [1 ]
机构：
[1] Sichuan Univ, Coll Chem Engn, Chengdu 610065, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 493卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Semiconductor; Hydrothermal synthesis; Titanium dioxide; Photocatalysis; SOL-GEL PROCESS; SURFACE MODIFICATION; HYDROTHERMAL METHOD; NANOTUBE ARRAYS; THIN-FILMS; TITANIA; NANOPARTICLES; SPHERES; TEMPERATURE; CARBON;
D O I：
10.1016/j.jallcom.2009.12.046
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：
Si-doped TiO2/carbon composite solid microspheres were prepared by a simple one-pot hydrothermal approach, using glucose, ammonium fluorotitaniate and ammonium fluorosilicate as raw materials. Then silica-embedded TiO2 hollow microspheres were obtained by calcination of the as-prepared precursor. Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD). Fourier transform infrared spectroscopy (FT-IR), N-2 adsorption-desorption measurement, X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectra (UV-vis DRS) were used to characterize the as-fabricated samples. Methylene blue (MB) solution was taken as the degradation model to evaluate the photocatalytic activity of the samples under ultraviolet light. The result showed that a remarkable improvement of photocatalytic activity for TiO2 hollow microspheres could be obtained by addition of silicon. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：L1 / L7
页数：7
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