Synthesis and characterization of silver-titania nanocomposites prepared by electrochemical method with enhanced photocatalytic characteristics, antifungal and antimicrobial activity

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Abstract

The paper deals with the synthesis of silver-titania (Ag-TiO 2 ) nanocomposites with enhanced photocatalytic, antifungal and antimicrobial characteristics. Ag nanoparticles have been electrochemically deposited on the commercially available nano-TiO 2 powders involving the so-called "sacrificial anode" technique. The obtained nanocomposites were characterized by X-ray diffraction, XPS and Raman spectroscopy to get information on their composition and structure. Particle size distribution and stability of Ag-TiO 2 based colloidal solutions have been determined from dynamic light scattering and zeta potential measurements. The recorded UV-vis diffuse reflectance spectra evidenced the presence of an absorption band located in the range of 475-525 nm and the presence of a tail as well, suggesting a better photocatalytic activity. The photoreactivity of the synthesized Ag-TiO 2 nanocomposite as well as the influence of Ag content were evaluated for the degradation of Orange II dye under UV irradiation (λ = 365 nm). The heterogeneous photocatalytic degradation rate follows pseudo first order kinetics. Antifungal and antimicrobial efficacy evaluation showed that the synthesized Ag-TiO 2 nanocomposites are significantly more active than pure titania.

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APA

Petica, A., Florea, A., Gaidau, C., Balan, D., & Anicai, L. (2019). Synthesis and characterization of silver-titania nanocomposites prepared by electrochemical method with enhanced photocatalytic characteristics, antifungal and antimicrobial activity. Journal of Materials Research and Technology, 8(1), 41–53. https://doi.org/10.1016/j.jmrt.2017.09.009

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