Photocatalytic activity of boron-modified TiO2 under visible light: The effect of boron content, calcination temperature and TiO2 matrix

被引：106
作者：
Zaleska, Adriana [1 ]
Grabowska, Ewelina [1 ]
Sobczak, Janusz W. [2 ]
Gazda, Maria [3 ]
Hupka, Jan [1 ]
机构：
[1] Gdansk Univ Technol, Dept Chem Technol, PL-80952 Gdansk, Poland
[2] Polish Acad Sci, Inst Phys Chem, Lab Electron Spect, PL-01224 Warsaw, Poland
[3] Gdansk Univ Technol, Fac Appl Phys & Math, Dept Solid State Phys, PL-80952 Gdansk, Poland
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2009年 / 89卷 / 3-4期
关键词：
Titanium dioxide; Boron-modified TiO2; Visible light photocatalysis; S-DOPED TIO2; MODIFIED TITANIUM-DIOXIDE; ACID TRIMETHYL ESTER; SOL-GEL METHOD; NITROGEN; PHOTOACTIVITY; DEGRADATION; ADSORPTION; ANATASE; OXIDES;
D O I：
10.1016/j.apcatb.2009.01.005
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：
Our research examines the photoactivity under visible light (lambda > 400 nm) and surface properties (BET surface area, UV-vis absorption properties, chemical composition and crystal structure) of boron-modified TiO2. B-TiO2 photocatalysts were prepared by surface impregnation procedure using boric acid triethyl ester (BATE) as a boron precursor. The photocatalytic activity of obtained powders in visible light was estimated by measuring the decomposition of phenol (0.21 mmol/dm(3)) in aqueous solution. The effect of boron content, calcination temperature and titanium dioxide source used during preparation procedure on photoactivity was investigated. The degradation of phenol indicated that the photoactivity under visible light strongly depended on preparation manner of B-TiO2 photocatalysts. The highest photoactivity was observed for the sample obtained by impregnation with 2 wt.% of BATE and calcinated at 400 degrees C. Phenol degradation rate, in the presence of these samples. equaled to 3.0 mu mol dm(-3) min(-1). The mode of BATE binding to TiO2 surface is discussed. (C) 2009 Elsevier B.V. All rights reserved.
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收藏
页码：469 / 475
页数：7
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