A mesoporous TiO2-xNx photocatalyst prepared by sonication pretreatment and in situ pyrolysis

被引：30

作者：

Li, Guisheng ^{[1
,2
]}

Yu, Jimmy C. ^{[1
,2
]}

Zhang, Dieqing ^{[1
,2
]}

Hu, Xianluo ^{[1
,2
]}

Lau, Woon Ming ^{[3
]}

机构：

[1] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China

[2] Chinese Univ Hong Kong, Environm Sci Programme, Shatin, Hong Kong, Peoples R China

[3] Univ Western Ontario, London, ON N6A 5B7, Canada

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2009年 / 67卷 / 02期

关键词：

Titanium dioxide; Nitrogen doping; Pyrolysis; Chelation; Sonication; VISIBLE-LIGHT PHOTOCATALYSIS; SUPERCRITICAL CONDITIONS; TITANIA; IRRADIATION; MECHANISM; SILICA; FILM;

D O I：

10.1016/j.seppur.2009.03.022

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A novel method for preparing a visible-light-driven mesoporous TiO2-xNx photocatalyst has been developed. It involves the in situ pyrolysis of the product from a chelation reaction under sonication between TiCl4 and ethylenediamine in an ethanol solution of the triblock copolymer F127. The as-prepared photocatalysts exhibit very strong photoactivity in the photocatalytic oxidation of methylene blue under irradiation in the visible spectral region. The samples were characterized by spectroscopic techniques including ultraviolet-visible light reflectance (UV-vis), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The effects of ultrasound on the physicochemical properties and photoactivity of mesoporous TiO2-xNx are discussed based on the characterization results. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：152 / 157

页数：6

共 34 条

[1] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].

Asahi, R ;

Morikawa, T ;

Ohwaki, T ;

Aoki, K ;

Taga, Y .

SCIENCE, 2001, 293 (5528) :269-271

[2] LIQUID-CRYSTALLINE PHASES AS TEMPLATES FOR THE SYNTHESIS OF MESOPOROUS SILICA [J].

ATTARD, GS ;

GLYDE, JC ;

GOLTNER, CG .

NATURE, 1995, 378 (6555) :366-368

[3] The impact of nanoscience on heterogeneous catalysis [J].

Bell, AT .

SCIENCE, 2003, 299 (5613) :1688-1691

[4] VISIBLE-LIGHT INDUCED WATER CLEAVAGE IN COLLOIDAL SOLUTIONS OF CHROMIUM-DOPED TITANIUM-DIOXIDE PARTICLES [J].

BORGARELLO, E ;

KIWI, J ;

GRATZEL, M ;

PELIZZETTI, E ;

VISCA, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1982, 104 (11) :2996-3002

[5] Formation of oxynitride as the photocatalytic enhancing site in nitrogen-doped titania nanocatalysts: Comparison to a commercial nanopowder [J].

Chen, XB ;

Lou, YB ;

Samia, ACS ;

Burda, C ;

Gole, JL .

ADVANCED FUNCTIONAL MATERIALS, 2005, 15 (01) :41-49

[6] Synthesis of hierarchical nanoporous F-doped TiO2 spheres with visible light photocatalytic activity [J].

Ho, W ;

Yu, JC ;

Lee, S .

CHEMICAL COMMUNICATIONS, 2006, (10) :1115-1117

[7] Preparation and photocatalytic behavior of MoS2 and WS2 nanocluster sensitized TiO2 [J].

Ho, WK ;

Yu, JC ;

Lin, J ;

Yu, JG ;

Li, PS .

LANGMUIR, 2004, 20 (14) :5865-5869

[8]

HOFFMANN MR, 1995, CHEM REV, V95, P96

[9] Hydroxyl radicals in microwave photocatalysis. Enhanced formation of OH radicals probed by ESR techniques in microwave-assisted photocatalysis in aqueous TiO2 dispersions [J].

Horikoshi, S ;

Hidaka, H ;

Serpone, N .

CHEMICAL PHYSICS LETTERS, 2003, 376 (3-4) :475-480

[10] Selective synthesis of anatase and rutile via ultrasound irradiation [J].

Huang, WP ;

Tang, XH ;

Wang, YQ ;

Koltypin, Y ;

Gedanken, A .

CHEMICAL COMMUNICATIONS, 2000, (15) :1415-1416

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