Photocatalytic degradation of dyes and microorganism inactivation using solution blow spun silver-modified titania fibers
| Autor: | Hélio de Lucena Lira, R.S. Leite, A. M. C. Santos, Lucas Leite Severo, Gelmires de Araújo Neves, J. F. Duarte Neto, Romualdo Rodrigues Menezes, Lúcio Roberto Cançado Castellano |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Anatase Materials science Process Chemistry and Technology 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry Chemical engineering Rutile Transmission electron microscopy law 0103 physical sciences Materials Chemistry Ceramics and Composites Rhodamine B Photocatalysis Calcination 0210 nano-technology Photodegradation Methylene blue |
| Zdroj: | Ceramics International. 46:13482-13490 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.02.132 |
| Popis: | This work investigated the photocatalytic effect of silver-modified titania fibers on the degradation of rhodamine B (RB) and methylene blue (MB) and the inactivation of Escherichia coli and Staphylococcus aureus strains. Fibrous cotton-wool-like structures resulted from a combination of the sol-gel route to solution blow spinning followed by calcination of hybrids fibers at 700 °C. Analysis of X-ray diffraction and transmission electron microscopy confirmed the presence of anatase and rutile polymorphs and metallic silver on fibers. Silver-modified titania fibers inhibited bacterial growth in all experimental conditions regardless of the ion content or UV-irradiation. The effectiveness of microorganism inactivation of titania fibers increases upon UV-irradiation. pH did not influence the photodegradation of RB, and solutions with basic pH enhanced the removal of MB. In a fixed pH, MB presents a faster photodegradation rate as compared to RB, but they match when applying silver-modified titania fibers and UV-irradiation. |
| Databáze: | OpenAIRE |
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