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Doskocz, Nina
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article
The Impact of Zeta Potential and Physicochemical Properties of TiO2-Based Nanocomposites on Their Biological Activity
Abstract
The aim of this research was to observe the relationship between zeta potential, morphology, surface area, porosity, chemical composition and ecotoxicity of nanocomposite powders such as: Au/TiO2, Ag2O/TiO2, PdO/TiO2, Ag/TiO2/SiO2, Ag/N(C)TiO2, SiO2/TiO2 from which Ag2O/TiO2, Ag/N(C)/TiO2 and Ag/TiO2/SiO2 were exhibiting good antimicrobial properties. It was observed, that nanomaterials characterized by similar morphology and zeta potential revealed the similar toxic behaviour. The samples of higher agglomeration and higher zeta potential, especially Ag/TiO2/SiO2 xerogeland TiO2/SiO2 aerogel were generally less ecotoxic to water organisms and plants. They were also not genotoxic in concentrations up to 500 mg/l and 250 mg/l, respectively.