| Titre : | Self-cleaning films with high transparency based on tiO2 nanoparticles synthesized via flame combustion (2010) |
| Auteurs : | Huiting Wang, Auteur ; Yanjie Hu, Auteur ; Ling Zhang, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 8, Avril 2010) |
| Article en page(s) : | pp. 3654–3662 |
| Note générale : | Industrial Chemistry |
| Langues : | Anglais |
| Tags : | Self-Cleaning Films with High Transparency Nanoparticles Synthesized Flame Combustion |
| Résumé : | Self-cleaning transparent nanoporous films with high photocatalytic properties were obtained based on the self-assembly of TiO2 nanoparticles synthesized by H2/O2 combustion flames. Films were prepared from multilayer deposition of poly(sodium 4-styrenesulfonate)-treated TiO2 nanoparticles and SiO2 nanoparticles with electrostatic interaction by the adsorption of positively charged poly(diallyldimethylammonium chloride) via layer-by-layer assembly processes. The assembly conditions, such as the pH and concentration of a nanoparticle suspension that cause variation of the surface charge densities, were found to strongly affect the thickness and morphology of multilayer films. TiO2/SiO2 coatings assembled with 10 cycles reach effective photocatalysis with a maximum transmittance of 99.3% as well as a water droplet spreading time as short as 0.29 s. The photodegradation kinetics showed that multilayer films fabricated with 10 cycles are 4 times more active than films assembled with 5 cycles, indicating that flame-synthesized TiO2 with well crystallinity can be used to fabricate high transparent self-cleaning films at suitable assembly conditions. The photocatalytic degradation kinetics dominated by control of the number of assembled cycles was also discussed. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie901782w |
