Photocatalytic coatings of silver–TiO2 nanocomposites on foamed waste-glass prepared by sonochemical process
| Autor: | Soo Wohn Lee, Vicente Rodríguez-González, S. Obregón-Alfaro |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Aqueous solution
Nanocomposite biology Chemistry General Chemical Engineering General Physics and Astronomy General Chemistry biology.organism_classification Polyvinyl alcohol Silver nanoparticle chemistry.chemical_compound Tetraselmis suecica Chemical engineering Titanium dioxide Photocatalysis Deposition (phase transition) |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 221:71-76 |
| ISSN: | 1010-6030 |
| DOI: | 10.1016/j.jphotochem.2011.04.026 |
| Popis: | Silver–TiO 2 nanocomposite was prepared by photodeposition of silver nanoparticles on the surface of titanium dioxide. The sonochemical method was used for the deposition of silver–TiO 2 powder on commercial foamed waste-glass strips (FWGS). The silver–TiO 2 and the coated FWGS was characterized by XRD, DRS, SEM, TEM and nitrogen adsorption. In order to enhance silver–TiO 2 deposition, different parameters were evaluated such as the solvent effect and use of stabilizing agents. The best deposition was obtained with an aqueous solution of polyvinyl alcohol (PVA) and an ultrasound irradiation source of 23.3 kHz. The photocatalytic activity of the silver–TiO 2 coated FWGS was evaluated in the UV photo-assisted destruction of the noxious microalgae, Tetraselmis suecica . It was found that after the photocatalytic irradiation, for 180 min, the algae cells were deformed, fragmented and annihilated, thereby avoiding its regeneration. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect