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PHOTOCATALYTIC ACTIVITY OF Ag/TiO2–P25 MODIFIED CEMENT: OPTIMIZATION USING TAGUCHI APPROACH
Autori: Mohammad A. Behnajady
Data aparitiei: Mai / 2018
Revista: Environmental Engineering and Management JournalVol. 17Nr. 5
ISSN: 1843 - 3707
Pret: 25.00 RON    
N.A.

In this study, Ag/TiO2–P25 nanoparticles prepared via photodeposition method and its textural properties were characterized using X–ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectroscopy (DRS), and N2 physisorption techniques. The cements modified with TiO2–P25 and Ag/TiO2–P25 nanoparticles were immobilized on tile plates, and their photocatalytic activity was evaluated versus the removal of Erioglaucine as the model organic pollutant. The Ag/TiO2–P25 modified cement showed the highest photocatalytic activity compared to TiO2–P25 modified cement due to the positive effect of silver in trapping photogenerated electrons at conduction band of TiO2. Also, the effect of operational variables such as initial Erioglaucine concentration, irradiation time, and UV–light intensity on the photocatalytic activity of Ag/TiO2–P25 modified cement was investigated and optimized using the Taguchi approach. The optimum operational conditions were found to be: initial Erioglaucine concentration of 5 mg L–1, irradiation time of 90 min and UV–light intensity of 55.9 W m–2.



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