Disclosing the hidden presence of Ti3+ ions in different TiO2 crystal structures synthesized at low temperature and photocatalytic evaluation by methylene blue photobleaching
| العنوان: | Disclosing the hidden presence of Ti3+ ions in different TiO2 crystal structures synthesized at low temperature and photocatalytic evaluation by methylene blue photobleaching |
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| المؤلفون: | Grace Kelly Q. Ganharul, Marcia Tsuyama Escote, Iseli L. Nantes-Cardoso, Aryane Tofanello, Jose A. Souza, André S. Polo, A. Bonadio, Andre L. M. Freitas |
| المصدر: | Journal of Materials Research. 36:3353-3365 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Anatase, Materials science, Mechanical Engineering, Crystal structure, Condensed Matter Physics, Photochemistry, Photobleaching, chemistry.chemical_compound, chemistry, Mechanics of Materials, Rutile, Titanium dioxide, Photocatalysis, General Materials Science, Photodegradation, Visible spectrum |
| الوصف: | We have performed a comprehensive study on the relationship among different crystal structures of TiO2, appearance of self-doping Ti3+ ions at low synthesis temperature, and photodegradation efficiency of the organic dye methylene blue (MB). Samples with anatase and rutile phase of TiO2 were synthesized by microwave assisted hydrothermal method. The anatase structured samples promote faster MB photobleaching in comparison with the rutile one. Electron paramagnetic resonance and X-ray photoelectron spectroscopies disclosed the presence of self-doping Ti3+ ions in the anatase that are completely absent in the rutile phase. The creation of these Ti3+ ions driven by anatase structure due to its lower vacancy formation energy induces mid-gap states within the band-gap of TiO2, which in turn can enhance the visible light absorption. Understanding the precursors at low synthesis temperatures of defects and self-doping formations can shed light on both the efficiency evolution and photocatalytic nature of this important semiconducting material. |
| تدمد: | 2044-5326 0884-2914 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::172a16ca968557f23aeef3328ca7c833 https://doi.org/10.1557/s43578-021-00342-y |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........172a16ca968557f23aeef3328ca7c833 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 20445326 08842914 |
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