Interstitial N-Doped TiO2 for Photocatalytic Methylene Blue Degradation under Visible Light Irradiation
Photocatalysis is a promising method for methylene blue (MB) degradation due to its effectiveness and environmental compatibility. Among the photocatalysts, titanium dioxide (TiO) has been widely used for MB degradation due to its exceptional photocatalytic activity. However, the wide bandgap limits...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:304173 |
| Acceso en línea: | https://ddd.uab.cat/record/304173 https://dx.doi.org/urn:doi:10.3390/catal14100681 |
| Access Level: | acceso abierto |
| Palabra clave: | TiO2 Nitrogen doping Photocatalytic activity Methylene bule degradation Visible light |
| Sumario: | Photocatalysis is a promising method for methylene blue (MB) degradation due to its effectiveness and environmental compatibility. Among the photocatalysts, titanium dioxide (TiO) has been widely used for MB degradation due to its exceptional photocatalytic activity. However, the wide bandgap limits the degradation efficiency of TiO under visible light. Here, an interstitial nitrogen-doped TiO (5%N/TiO) used thiourea as the N source was fabricated for visible light-derived MB degradation. The 5%N/TiO exhibited an extended absorption range of visible light. Moreover, photoelectrochemical measurements showed an improvement in the photocurrent response and charge transfer behavior on N/TiO. Thus, 5%N/TiO had enhanced photocatalytic activity compared with pristine TiO and substitutive N-doped TiO (5%N/TiO). The accelerated photocatalytic MB degradation process on N/TiO could be mainly attributed to the interstitial N doping, which caused the appearance of new energy states and extended optical properties. Through comparing the impact of interstitial and substitutive in TiO activity, our work proposes a suitable form of element doping to enhance the optical properties and photocatalytic activity of TiO and even other semiconductors, providing guidance for future work. |
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