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Structure and enhanced antimicrobial activity of mechanically activated nano TiO 2
Author(s) -
Pavlović Vera P.,
Vujančević Jelena D.,
Mašković Pavle,
Ćirković Jovana,
Papan Jelena M.,
Kosanović Darko,
Dramićanin Miroslav D.,
Petrović Predrag B.,
Vlahović Branislav,
Pavlović Vladimir B.
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16668
Subject(s) - photocatalysis , antimicrobial , titanium dioxide , scanning electron microscope , materials science , diffuse reflectance infrared fourier transform , x ray photoelectron spectroscopy , desorption , adsorption , chemical engineering , nuclear chemistry , chemistry , analytical chemistry (journal) , nanotechnology , organic chemistry , composite material , catalysis , engineering
Titanium dioxide is a photocatalyst, known not only for its ability to oxidize organic contaminants, but also for its antimicrobial properties. In this article, significant enhancement of the antimicrobial activity of TiO 2 (up to 32 times) was demonstrated after its activation by ball milling. The antimicrobial activity was analyzed for one fungal and 13 bacterial ATCC strains using the microdilution method and recording the minimum inhibitory concentration (MIC) values. In order to further investigate the correlation between the mechanical activation of TiO 2 and its antimicrobial activity, the structure, morphology and phase composition of the material were studied by means of Electron Microscopy, X‐ray diffraction and nitrogen adsorption‐desorption measurements. UV‐Vis diffuse reflectance spectra were recorded and the Kubelka‐Munk function was applied to convert reflectance into the equivalent band gap energy ( E g ) and, consequently, to investigate changes in the E g value. X‐ray photoelectron spectroscopy was used to analyze the influence of mechanical activation on the Ti 2p and O 1s spectra. The presented results are expected to enable the development of more sustainable and effective advanced TiO 2 ‐based materials with antimicrobial properties that could be used in numerous green technology applications.