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| Citric Acid–Catalyzed Synthesis of N–doped Mesoporous TiO2 and Their Photocatalytical Properties |
| LIU Guocong1,2, DONG Hui1, LIU Shaoyou3 |
1.Institute of advanced materials & Chembiosensing technology, Yulin Normal University, Yulin 537000
2.College of Chemistry and Chemical Engineering, Cental South University, Changsha 410083
3.Institute of Applied Chemistry, Kaili College, Kaili 556000 |
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Cite this article:
LIU Guocong DONG Hui LIU Shaoyou. Citric Acid–Catalyzed Synthesis of N–doped Mesoporous TiO2 and Their Photocatalytical Properties. Chin J Mater Res, 2010, 24(6): 631-637.
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Abstract N–doped mesoporous TiO2 was prepared via a facile sol–gel route catalyzed by citric acid, and N–TiO2 was characterized using powder X–ray diffraction (XRD), High–resolution transmission electron microscope (HRTEM), X–ray photoelectron spectrum (XPS), N2 adsorption (BET), UV–xis diffused reflectance spectra (UV–vis). The results revealed that uncalcined N–TiO2 was amorphous, and the products calcined under lower temperatures were anatase, while the one annealed at 750oC was rutile .The doping of a little N element resulted in a red shift of the absorption edge, shifting to the visible light region of mesoporous TiO2. N2 adsorption isotherm showed that the BET surface area and the average pore size of N–doped TiO2 were about 102 m2/g and 9.8 nm, respectively. Compared with P25 TiO2, N–doped mesoporous TiO2 exhibited improved photocatalysis activities for photodegradation of methyl orange.
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Received: 30 July 2010
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| Fund: Supported by Nature Science Foundation of Hunan Province No.08JJ3104, Nature Science Youth Foundation of Guangxi Province No.2010GXNSFB013018, Excellent Talent Projects of Guangxi High Education Nos.G2009033, G2009045 and National Nature Science Foundation of China No.21061006. |
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