Study of N-TiO₂ Photocatalysts and their Catalytic Activities under Simulated Sunlight

Abstract:

N doped TiO₂ was prepared by methods of sol-gel, precipitation, and temperature programmed nitridation (TPN) with NH₃, respectively. The physical structure and chemical properties of the prepared N-TiO₂ were characterized by DRS, XRD, XPS, and EPR spectra techniques. The result of XRD illustrated that all the samples were anatase, and no rutile or brookite phase. XPS and EPR indicated that N-TiO₂ prepared by precipitate exist Ti³⁺ on the surface of TiO₂. DRS pattern demonstrated N doping lead to the band gap narrow of all the samples, and the smallest band-gap energy of the samples prepared by precipitation was about 2.45eV. The photocatalytic activities were investigated by the photocatalytic degradation of methylene blue (MB) under simulated sunlight, and the highest activities reached to 75% during 120min.

• Periodical: Advanced Materials Research (Volume 918)
• Pages: 27-31
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.918.27
• Online since: April 2014
• Authors: Sheng Jun Wang, Lin Lin Wang, Wen Yu Zhang
• Keywords: N-TiO₂, Photocatalytic, Simulated Sunlight, Ti³⁺

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