Komtchou, Simon; Delegan, Nazar; Dirany, Ahmad; Drogui, Patrick 
ORCID: https://orcid.org/0000-0002-3802-2729; Robert, Didier et El Khakani, My Ali
(2018).
Removal of atrazine by photoelectrocatalytic process under sunlight using WN-codoped TiO2 photoanode.
Journal of Applied Electrochemistry
, vol. 48
, nº 12.
pp. 1353-1361.
DOI: 10.1007/s10800-018-1253-8.
Résumé
La transcription des symboles et des caractères spéciaux utilisés dans la version originale de ce résumé n’a pas été possible en raison de limitations techniques. La version correcte de ce résumé peut être lue dans le document original.
The present study was focused on the degradation of Atrazine (ATZ) and major by-products (DEA, DIA, DEDIA and ATZ-OH) from water by photoelectrocatalytic (PEC) oxidation process under solar light. The undoped TiO2, sub-stoichiometric TiO2 (TiO2−x) and codoped TiO2(TiO2:WN) photoanodes were prepared by means of a radio frequency magnetron sputtering (RF-MS) deposition process. The X-ray photoelectron spectra (XPS) analysis shows that the N and W atoms were incorporated into the O and Ti lattice sites of TiO2 respectively (case of TiO2:WN film), while the XPS measurements of the TiO2−x films composition was determined to be TiO1.9. The UV–Vis transmittance spectra shows that in the case of the TiO2:WN films, the presence of nitrogen and tungsten improve the optical response of TiO2 under visible range compare to the presence of oxygen vacancies in to the TiO2−x films. The experimental results under solar light with an initial concentration of ATZ (100 µg L−1) show that after 180 min of treatment, the degradation of ATZ were 34.98%, 68.57% and 94.33% using TiO2, TiO2−x and TiO2:WN photoanodes, respectively. These results of ATZ degradation proved that TiO2:WN photoanode was more photoactive under solar light. The evolution by-products of ATZ under sunlight show that the principal mechanism of ATZ degradation was the oxidation of alkyl side chain and dealkylation.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | atrazine; photoelectrocatalytic oxidation; sub-stoichiometric TiO₂; codoped TiO₂; dealkylation |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 23 oct. 2018 20:16 |
| Dernière modification: | 15 févr. 2022 15:51 |
| URI: | https://espace.inrs.ca/id/eprint/7744 |
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