| Titre : |
Microwave-assisted preparation of pyrite and its sensitisation of titanium dioxide in self-cleaning aramid fabrics |
| Type de document : |
texte imprimé |
| Auteurs : |
Chenghui Zheng, Auteur ; Chang-E Zhou, Auteur ; Zhenming Qi ; Qingqing Zhou ; Chaoxia Wang |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 284-291 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse spectrale
Angle de contact
Bleu de méthylène
Caractérisation
Colorants -- Détérioration
Dioxyde de titane
Dispersions et suspensions
Fibre aramide
Micro-ondes
Photocatalyse
Photodétérioration
PyriteLa pyrite est une espèce minérale composée de disulfure de fer (FeS2), polymorphe de la marcassite ; elle peut contenir des traces de nickel (Ni), cobalt (Co), arsenic (As), cuivre (Cu), zinc (Zn), argent (Ag), or (Au), thallium (Tl), sélénium (Se) et vanadium (V).
Résistance au rayonnement ultraviolet
Textiles et tissus auto-nettoyants
Textiles et tissus synthétiques
|
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
Titanium dioxide (TiO2) dispersions were obtained by neutralising anatase nano‐titanium dioxide sols prepared by hydrolysing tetrabutyl titanate in acidic aqueous media. Pyrite was initially prepared via the microwave‐assisted method with a mixed solvent of ethylene glycol and small amounts of water, and was then used in sensitising micron‐sized titanium dioxide particles to obtain aramid fabrics with self‐cleaning properties. X‐ray diffraction demonstrated the crystalline structure of pyrite, and ultraviolet‐visible (UV‐vis) spectrum and energy‐dispersive X‐ray spectroscopy characterised the band gaps, surface status on fabrics and the distribution of the pyrite compound's titanium dioxide particles. The contact angle, UV protection factor (UPF) and photocatalytic degradation of methylene blue (MB) were used to evaluate the performance of treated aramid fabrics. Results show that pyrite‐sensitised titanium dioxide compounds obtained at pH 5 have smaller band gap energies and relatively poor wetting abilities, higher UPF values, and perform well in the photocatalytic degradation of MB. The pseudo‐first kinetic model was used to analyse elaborate sections of the curve for the degradation of MB. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of titanium dioxide dispersions - Preparation of pyrite - Treatment of aramid fabrics - Characterisation
- RESULTS AND DISCUSSION : X-ray diffraction - UV-vis diffuse spectra - EDS analysis - UPF - Contact angles - Photocatalytic degradation of MB
- Tables : 1. Contact angles of water droplets on aramid fabrics - 2. Pseudo-first kinetic parameters and half-life of the photocatalytic degradation of MB |
| DOI : |
10.1111/cote.12348 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12348 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30923 |
in COLORATION TECHNOLOGY > Vol. 134, N° 4 (08/2018) . - p. 284-291
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Microwave-assisted preparation of pyrite and its sensitisation of titanium dioxide in self-cleaning aramid fabrics in COLORATION TECHNOLOGY, Vol. 134, N° 4 (08/2018)
