TiO2-BASED COMPOSITE FILMS FOR THE PHOTODEGRADATION OF OXYTETRACYCLINE

Hui Li, Ling-Xiao Guan, Ji-Jun Feng, Fang Li and Ming-Ming Yao ()
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Hui Li: Key Laboratory of Chemical Sensing &, Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
Ling-Xiao Guan: School of Chemistry and Chemical Engineering, Ningxia Normal University, Guyuan 75600, P. R. China
Ji-Jun Feng: Key Laboratory of Chemical Sensing &, Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
Fang Li: Key Laboratory of Chemical Sensing &, Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
Ming-Ming Yao: Key Laboratory of Chemical Sensing &, Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China

Surface Review and Letters (SRL), 2015, vol. 22, issue 02, 1-7

Abstract: The spread of the antibiotic oxytetracycline (OTC) has been thought as a threat to the safety of drinking water. In this paper, the photocatalytic activity of the nanocrystallineFe/Caco-dopedTiO2-SiO2composite film for the degradation of OTC was studied. The films were characterized by field emission scanning electron microscopy (FE-SEM) equipped with energy-dispersive spectroscopy (EDS),N2adsorption/desorption isotherms, photoluminescence (PL) spectra, and UV-Vis diffraction reflectance absorption spectra (DRS). The FE-SEM results indicated that the Fe/Ca co-dopedTiO2-SiO2film was composed of smaller nanoparticles compared to pureTiO2orTiO2-SiO2film. The BET surface area results showed that the specific surface area of the pureTiO2,TiO2-SiO2andCa2+/Fe3+co-dopedTiO2-SiO2is 118.3 m2g-1, 294.3 m2g-1and 393.7 m2g-1, respectively. The DRS and PL spectra revealed that the Fe/Ca co-dopedTiO2-SiO2film had strong visible light adsorption and diminished electrons/holes recombination. Experimental results showed that theFe/Caco-dopedTiO2-SiO2film is effective in the degradation of OTC under both UV and visible light irradiation.

Keywords: TiO2-SiO2composite; Fe3+/Ca2+co-doping; OTC photodegredation (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1142/S0218625X15500249

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