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Comparison of photocatalysis degradation of 4-nitrophenol using N,S co-doped TiO2 nanoparticles synthesized by two different routes

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Abstract

The photocatalytic degradation of 4-nitrophenol as pollutant in aqueous solutions was investigated under visible light irradiation over two different N–S-codoped anatase TiO2 catalysts prepared by sol–gel methods using titanium isopropoxide and titanium tetrachloride as two different precursors. The catalysts were characterized by XRD, SEM, DRS, EDAX and FT-IR. The effects of various operating parameters including the initial concentration of 4-nitrophenol (2–14 ppm), solution pH (5–8) and kinetic reactions were studied. The optimum solution pH was at around 6. For comparison purpose, the photodegradation activity of the commercial Degussa P-25 TiO2 catalyst has also been studied. The results indicated that photocatalytic activity of N–S-codoped TiO2 with titanium isopropoxide as precursor was higher than N–S-codoped TiO2 with titanium tetrachloride as precursor and Degussa P-25.

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Correspondence to Rahmatollah Rahimi.

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Rahimi, R., Safalou Moghaddam, S. & Rabbani, M. Comparison of photocatalysis degradation of 4-nitrophenol using N,S co-doped TiO2 nanoparticles synthesized by two different routes. J Sol-Gel Sci Technol 64, 17–26 (2012). https://doi.org/10.1007/s10971-012-2823-6

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  • DOI: https://doi.org/10.1007/s10971-012-2823-6

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