Pr, N, and P tri-doped anatase TiO2 nanosheets with enhanced photocatalytic activity under sunlight

doi:10.1016/S1872-2067(14)60047-4

Abstract

Abstract:

Pr, N, and P tri-doped anatase TiO₂ nanosheets (PrNPTO) were synthesized by a combined sol-gel solvothermal method and characterized by X-ray diffraction, transmission electron microscopy, N₂ adsorption-desorption, X-ray photoelectron spectroscopy, UV-vis absorbance spectroscopy, and photoluminescence spectroscopy. When the Pr-doping concentration was 1.75 wt% and calcination temperature employed was 550℃, the resulting PrNPTO showed the highest photoactivity towards the degradation of methylene blue under visible and UV light irradiation. PrNPTO also displayed superior photoactivity towards the degradation of 4-chlorophenol under sunlight (k_app=3.90×10^-2 min^-1) over the non-doped, single-doped, and co-doped samples, and P25 TiO₂ (k_app=1.17×10^-2min^-1). The high photoactivity of PrNPTO was attributed to the increased UV and visible light absorption properties, reduced recombination of photogenerated carriers, increased surface hydroxyl content, and improved surface textural properties. PrNPTO was highly efficient and stable under simulated sunlight irradiation, which are essential attributes for practical application in environment-related remediation schemes.

Key words: Titania, Pr, N, and P tri-doping, Sol-gel, Solvothermal, Sunlight, Photocatalysis

Hongquan Jiang, Qiaofeng Wang, Shiyang Li, Jingshen Li, Qingyuan Wang. Pr, N, and P tri-doped anatase TiO₂ nanosheets with enhanced photocatalytic activity under sunlight[J]. Chinese Journal of Catalysis, 2014, 35(7): 1068-1077.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(14)60047-4

https://www.cjcatal.com/EN/Y2014/V35/I7/1068

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Pr, N, and P tri-doped anatase TiO₂ nanosheets with enhanced photocatalytic activity under sunlight

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