[article]
| Titre : |
Optimization of parameters for the preparation of Au/TiO2 with photodegradation of NPE-10 in aqueous solution |
| Type de document : |
texte imprimé |
| Auteurs : |
C.-B. Feng, Auteur ; L. Chen, Auteur ; Z.-P. Du, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 200-204 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Surfactants
|
| Tags : |
Au/TiO2 'Déposition-précipitation urée' (DP-urée) 'Méthode Taguchi' 'Réponse lumière visible' Nanoparticule NPE-10 Photodégradation |
| Index. décimale : |
668.1 Agents tensioactifs : savons, détergents |
| Résumé : |
The degradation in aqueous solution of nonionic surfactant, nonylphenyl poly(oxyethylene)ethers (NPE-10), which was photocatalyzed by Au/TiO2nanoparticles has been studied. The particles were obtained using modified deposition-precipitation with Urea (DP Urea). The Taguchi method was implemented successfully to optimize the photoactivity for Au/TiO2photocatalyst. The optimized catalyst was characterized by XRD, BET, TEM, XPS and UV-visible absorption spectra techniques. It was found that Au3+/Ti4+molar ratio was the main parameter having significant effect on photocatalytic activity. Under optimal conditions, the observed Au nano-particle size and distributions indicate, that smaller gold nanoparticles (*1.8 nm diameter) were obtained, and the existing of Au particles promote the photoadsorption of oxygen on the surface of photocatalysts. Both are responsible for the significantly enhanced catalytic activity of commercial TiO2(pure P-25) toward the photodegradation of NPE-10-probably by increasing the rate of production of separated electrons and holes. |
| Note de contenu : |
- EXPERIMENTAL : Preparation of photocatalysts and measurement of photocatalytic activity - Orthogonal array and characterization of photocatalyst.
- RESULTS AND DISCUSSION : Taguchi design and analysis of variance - Prediction and confirmation of properties - Characterization of Au/TiO2 (Structural analysis of the catalyst - Optical absorption properties ofphotocatalyst). |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11700 |
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 3/2011 (05/2011) . - p. 200-204
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