Benavides-Guerrero, Jaime A., Fourmont, Paul, Gerlein, Luis Felipe, Angel-Ospina, Astrid C., Machuca-Martinez, Fiderman, Vaussenat, Fabrice, Ross, Caroline A. et Cloutier, Sylvain G..
2025.
« Black anatase-TiO2 electrodes for sun-activated photocatalytic degradation of organic water contaminants ».
Surfaces and Interfaces, vol. 58.
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Résumé
This study presents the synthesis of black anatase in air and its use for the fabrication of a reusable electrode for the photocatalytic degradation of Rhodamine B (RhB) under visible-light. Characterization techniques such as Xray diffraction, Raman spectroscopy, and Transmission Electron Microscopy (TEM) were used to analyze the properties of black anatase. The immobilization of black TiO2 on a glass substrate eliminates the need for posttreatment recovery of the photocatalyst. Enhancement of photocatalytic activity was achieved by depositing a 4 nm platinum layer on the black anatase TiO2 electrode. Activation of the photocatalytic process (λ ≥ 400 nm) was conducted with a solar simulator, and the degradation of RhB was monitored through visible absorption and time-resolved fluorescence spectroscopy, revealing degradation efficiencies of 94 % and 89 % after 40 and 60 min, respectively. These results are attributed to the elevated levels of oxygen vacancies and the Schottky barrier formed between the platinum layer and black anatase. The methodology’s simplicity and the significant photocatalytic efficiency suggest potential for widespread application in solar-driven photocatalytic degradation.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Cloutier, Sylvain G. |
| Affiliation: | Génie électrique |
| Date de dépôt: | 27 janv. 2025 19:22 |
| Dernière modification: | 30 janv. 2025 14:52 |
| URI: | https://espace2.etsmtl.ca/id/eprint/30491 |
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