Template-free sol-gel preparation and characterization of free-standing visible light responsive C,N-modified porous monolithic TiO2

被引：24
作者：
Chen, Chao [1 ,2 ]
Cai, Weimin [1 ,2 ,3 ]
Long, Mingce [3 ]
Zhang, Jingyi [3 ]
Zhou, Baoxue [1 ,3 ]
Wu, Yahui [1 ,2 ]
Wu, Deyong [3 ]
机构：
[1] Harbin Inst Technol, Dept Environm Sci & Engn, Sch Municipal & Environm Engn, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
[3] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 178卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
Porous monolith; Titanium dioxide; Modification; Visible light; Photocatalysis; DOPED TIO2; PHOTOCATALYTIC DEGRADATION; ANATASE TIO2; NITROGEN; TITANIA; DYE; PERFORMANCE; POLLUTANTS; OXIDATION; SURFACES;
D O I：
10.1016/j.jhazmat.2010.01.121
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Visible light responsive C,N-modified porous monolithic titania (MTf) has been successfully synthesized. The template-free sol-gel synthesis method accompanied by phase separation and in situ C,N-modification has been used. The molar ratio of water to tetrabutyl titanate (f) in starting solution plays an important role in the porous structure and photoactivity of MTf. Scanning electron microscopy (SEM) analysis and N-2 adsorption-desorption analysis show that MTf possess mesoporous structure as well as macroporous structure. MT22 has been further characterized by using X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectra (DRS). The results show that both nitrogen and carbon elements exist in MT22 and result in the visible light photocatalytic activity of MT22. The observed reaction rate of decolorization of methyl orange is 0.0026 min(-1). (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：560 / 565
页数：6
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