Visible-light photocatalytic activity and recyclability of N-doped TiO2 films grown by MOCVD
| Autor: | E. C. de Oliveira, R. T. Bento, O. V. Correa, M. F. Pillis |
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| Jazyk: | English<br />Portuguese |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Cerâmica, Vol 66, Iss 380, Pp 451-459 (2020) |
| Druh dokumentu: | article |
| ISSN: | 1678-4553 0366-6913 |
| DOI: | 10.1590/0366-69132020663802957 |
| Popis: | Abstract Nitrogen-doped TiO2 films were grown on borosilicate glass substrates at 400 °C by the metallorganic chemical vapor deposition (MOCVD) for removing dye from water under visible light. The effect of N-doping on the structural, surface, and photocatalytic properties of films was evaluated. X-ray photoelectron spectroscopy (XPS) analyses revealed that 1.56 and 2.44 at% of nitrogen were incorporated into the films by varying the NH3 flux during the growth. Methyl orange dye degradation experiments showed that the N-doped films presented photoactivity under visible light. The film containing 2.44 at% of nitrogen exhibited the best photocatalytic behavior, with 55% of efficiency. Recyclability tests under visible light showed that the film efficiency dropped gradually after each test. N-TiO2 films grown by MOCVD have the potential to be used in environmental applications by removing pollutants using a green method under sunlight or even under internal illumination, although its reuse is limited. |
| Databáze: | Directory of Open Access Journals |
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