Synthesis, characterization and antibacterial action of hollow titania spheres
| Autor: | Ioannis A. Kartsonakis, D. Bouzarelou, I. Danilidis, George Kordas, P. Liatsi |
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| Rok vydání: | 2008 |
| Předmět: |
Thermogravimetric analysis
technology industry and agriculture Analytical chemistry Cationic polymerization General Chemistry equipment and supplies Condensed Matter Physics Styrene Titanium oxide Thermogravimetry chemistry.chemical_compound chemistry Chemical engineering Polymerization Differential thermal analysis General Materials Science Polystyrene |
| Zdroj: | Journal of Physics and Chemistry of Solids. 69:214-221 |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/j.jpcs.2007.08.071 |
| Popis: | Hollow titania spheres were synthesized using the cationic polystyrene lattices which were prepared by polymerization in suspension of styrene using 2,2′-azobis (2-methylpropionamidine) dihydrochloride (AMPA) as an initiator. These cationic colloidal particles were dispersed in absolute ethanol in the presence of poly(vinylpyrrolidone) (PVP), solution of sodium chloride (NaCl) and mixed with ethanolic solutions of titanium tetraisopropoxide (TTIP). Subsequently, hollow spheres of titania compounds were obtained by calcinations of the so-coated polystyrene lattices at elevated temperature in air. The hollow titania spheres were characterized with scanning electron microscopy (SEM), FT-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Moreover, antibacterial action of illuminated hollow titania spheres on pure culture of Escherichia coli ( E. coli ) was studied. A decrease of E. coli concentration was observed after illumination of bacteria in the presence of hollow titania spheres. |
| Databáze: | OpenAIRE |
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