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  • Title: Cu-doped TiO(2) nanoparticles for photocatalytic disinfection of bacteria under visible light.
    Author: Karunakaran C, Abiramasundari G, Gomathisankar P, Manikandan G, Anandi V.
    Journal: J Colloid Interface Sci; 2010 Dec 01; 352(1):68-74. PubMed ID: 20832079.
    Abstract:
    Two percent Cu-doped TiO(2) nanoparticles were prepared by a modified ammonia-evaporation-induced synthetic method, calcined at 450°C, and characterized by powder X-ray diffraction, energy dispersive X-ray analysis, ESR spectroscopy, scanning electron microscopy, UV-visible diffuse reflectance spectrum, photoluminescence spectroscopy, and electrochemical impedance spectroscopy. Doping shifts the optical absorption edge to the visible region but increases the charge-transfer resistance and decreases the capacitance. Under visible light, the composite nanoparticles very efficiently catalyze the disinfection of Escherichia coli. The prepared oxide is selective in photocatalysis; under UV light, its photocatalytic activity to degrade sunset yellow, rhodamine B, and methylene blue dyes is less than that of the undoped one.
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