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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 3: 443 - 447

DOI: https://doi.org/10.3724/sp.j.1077.2009.00443

Research Paper

Mechanism of the Doping Species Controlling the UV Photocatalytic Activity of Nitrogen Doped TiO2

  • LIU Hui-Jing ,
  • BAI Yuan ,
  • SUN Hong-Qi ,
  • JIN Wan-Qin
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  • State Key Laboratory of MaterialsOriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009，China

Received date: 2008-07-23

  Revised date: 2008-09-23

  Online published: 2009-05-20

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Abstract

Nitrogendoped and pure TiO2 photocatalysts were synthesized by precipitation method using TiCl4 as titanium precursor. Both X-ray diffraction (XRD) and N2 adsorptiondesorption isotherms show that the asprepared samples consis of anatase phase except for trace brookite phase with mesoporous structure. X-ray photoelectron spectroscopy(XPS) confirms that the incorporated nitrogen element exists as the chemical state of NOx. The UV-Vis diffuse reflection absorption spectra (UV-Vis) reveal that the nitrogendoped TiO2 shows a new absorption region at 400-550nm. The photocatalytic activities of the nitrogendoped TiO2 utilized for the photodegradation of 4-chlorophenol (4-CP) are higher than those of the pure TiO2 under UV and visible light irradiation. The improved photocatalytic activities under UV light irradiation of the nitrogendoped TiO2 are attributed to the presence of NOx. With no influence on the energy gap of TiO2, NOx can extend the optical response of TiO2, excite more photoinduced electronsholes for photocatalysis and reduce the recombination probabilities of carriers.

Key words： titanium dioxide; nitrogendoped; photocatalysis; UV light

Cite this article

LIU Hui-Jing , BAI Yuan , SUN Hong-Qi , JIN Wan-Qin . Mechanism of the Doping Species Controlling the UV Photocatalytic Activity of Nitrogen Doped TiO2[J]. Journal of Inorganic Materials, 2009 , 24(3) : 443 -447 . DOI: 10.3724/sp.j.1077.2009.00443

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