Photocatalytic and Antibacterial Activity of TiO2 And Au/TiO2 nanosystems
| Autor: | Urška Lavrenčič Štangar, Chiara Maccato, Martina Bergant, Lidia Armelao, Alberto Gasparotto, Eugenio Tondello, Davide Barreca, Dunja Mahne, Cinzia Maragno, Gregorio Bottaro |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Materials science
TITANIUM-DIOXIDE Annealing (metallurgy) Scanning electron microscope Mechanical Engineering Nanoparticle Bioengineering Nanotechnology General Chemistry AQUEOUS-SOLUTION ORGANIC POLLUTANTS THIN-FILMS Chemical engineering Mechanics of Materials Colloidal gold GOLD NANOPARTICLES Photocatalysis General Materials Science Electrical and Electronic Engineering Photodegradation Antibacterial activity Sol-gel |
| Zdroj: | Nanotechnology (Bristol. Print) 18 (2007): 375709. doi:10.1088/0957-4484/18/37/375709 info:cnr-pdr/source/autori:L. Armelao; D. Barreca; G. Bottaro; A. Gasparotto; C. Maccato; C. Maragno; E. Tondello; U. Stangar Lavrencic; M. Bergant; D.Mahne/titolo:Photocatalytic and Antibacterial Activity of TiO2 And Au%2FTiO2 nanosystems/doi:10.1088%2F0957-4484%2F18%2F37%2F375709/rivista:Nanotechnology (Bristol. Print)/anno:2007/pagina_da:375709/pagina_a:/intervallo_pagine:375709/volume:18 |
| DOI: | 10.1088/0957-4484/18/37/375709 |
| Popis: | This work focuses on the photocatalytic performances and antibacterial activity of TiO2 and Au/ TiO2 nanosystems. While the former are obtained by a sol - gel route, the latter are synthesized by an innovative hybrid RF- sputtering/ sol - gel approach, followed by ex situ annealing in air up to 600. C. Important information on nanoparticle size, shape and distribution is obtained by the combined use of glancing incidence x- ray diffraction ( GIXRD) and field emission- scanning electron microscopy ( FE- SEM). Subsequently, the photocatalytic performances of the obtained nanosystems in the decomposition of the azo- dye Plasmocorinth B and their antibacterial activity in the elimination of Bacillus subtilis are illustrated and discussed in comparison with films obtained from standard Degussa P25 powders. The obtained results show a significant dependence of the functional performances on the system's compositional, structural and morphological properties. In particular, the dispersion of gold nanoparticles on the TiO2 matrix has a beneficial influence on the azo- dye photodegradation, whereas the antimicrobial activity of Au/ TiO2 films is retarded with respect to pure TiO2. |
| Databáze: | OpenAIRE |
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