Preparation of azo-dye sensitized TiO 2 photocatalyst for inhibition of E-Coli bacteria under visible light irradiation
| Autor: | M. Giridhar, R. Kenchappa, M.C. Prabakar, C.N. Sudhamani, R. Vishwanath, H.S. BhojyaNaik |
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| Rok vydání: | 2017 |
| Předmět: |
Anatase
Materials science 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology medicine.disease_cause Photochemistry 01 natural sciences 0104 chemical sciences Nanomaterials Metal chemistry.chemical_compound chemistry visual_art Titanium dioxide medicine Photocatalysis visual_art.visual_art_medium 0210 nano-technology Antibacterial activity Escherichia coli Benzoic acid |
| Zdroj: | Materials Today: Proceedings. 4:11671-11678 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2017.09.081 |
| Popis: | The antibacterial activity of dye-sensitized semiconductor titanium dioxide films containing 4-{(E)-[4-(dimethylamino) phenyl] diazenyl} benzoic acid azo dye against E. coli was investigated as a model for Gram-negative bacteria. Several reports have been reported where metal complex have is used as dye, though sensitization of organic dye has not yet reported. These azo-dye sensitized TiO2 nanomaterials were characterized by XRD, SEM and UV-visible spectra. Spherical nature of TiO2 and sensitization can be seen from SEM images, XRD data suggest the particles in anatase form, photo switching of Azo-dye was studied using UV-Visible spectra. The bactericidal effects of films under UV-visible light irradiation were measured, experimental results indicate that these films inhibit the growth of Escherichia coli under UV light irradiation, the irradiation time could be considerably reduced and the bactericidal efficiency is related to the coverage of TiO2 films. With the increase in concentration of dye the activity was also increased. |
| Databáze: | OpenAIRE |
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