| Titre : |
Insights into the composite coating for improving the weatherability of TiO2 white pigments |
| Type de document : |
texte imprimé |
| Auteurs : |
Ying Wang, Auteur ; Yangsong Chen, Auteur ; Ling Yang, Auteur ; Jincheng Jian, Auteur ; Shanshan Liu, Auteur ; Shiguang Guo, Auteur ; Wei Cui, Auteur ; Tao He, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 2125-2133 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Composites
Dioxyde de titane
Photoélectrochimie
Pigments inorganiques
Résistance aux conditions climatiques
Revêtements inorganiques
Traîtements de surface
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Several inorganic coatings, such as ZrO2, SiO2, Al2O3, and AlPO4, have been utilized in the TiO2 pigment industry in order to reduce the natural photoactivity of TiO2 nanoparticles. However, the different role of each material in impacting the TiO2 photoactivity lacks comparative studies, and this is critical to provide a composite coating strategy for TiO2 pigments to achieve optimal weatherability. Our work has shown that each of these coating materials plays a unique role in suppressing the TiO2 photoactivity. For instance, ZrO2 and AlPO4 increase the rate of charge recombination, while SiO2 reduces it. By comparing and analyzing their effects on the charge carrier processes, we have designed and created a composite-coated TiO2 pigment that features a sequential deposition of ZrO2, SiO2, and AlPO4. This product has been proved to exhibit excellent weatherability. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Process of AlPO4 coating - Process of Al2O3 coating - Process of zirconia coating - Process of silica coating - Process of composite coating - Photoactivity assessment by methyl orange (MO) photodegradation - Photoelectrochemical (PEC) measurements
- RESULTS AND DISCUSSION : Comparison of AlPO4 and Al2O3-coated TiO2 pigments - Investigation on silica- and zirconia-coated TiO2 pigments - Design of composite-coated TiO2 pigments
- Table 1 : Effects of single coating layers toward the TiO2 photoactivity |
| DOI : |
https://doi.org/10.1007/s11998-023-00809-z |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-023-00809-z.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40187 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 2125-2133
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