Photoaccumulating Nanoheterostructures Based on Titanium Dioxide
| العنوان: | Photoaccumulating Nanoheterostructures Based on Titanium Dioxide |
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| المؤلفون: | Elizaveta A. Konstantinova, V. B. Zaitsev, E. V. Kytina, Artem Marikutsa |
| المصدر: | Semiconductors. 55:219-227 |
| بيانات النشر: | Pleiades Publishing Ltd, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 010302 applied physics, Materials science, Absorption spectroscopy, chemistry.chemical_element, Vanadium, 02 engineering and technology, Tungsten, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Photochemistry, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, chemistry, Specific surface area, 0103 physical sciences, Titanium dioxide, Photocatalysis, 0210 nano-technology, Spectroscopy, Titanium |
| الوصف: | Nanoheterostructures based on titanium dioxide synthesized by the sol–gel technique are studied. Microscopy, X-ray diffraction, optical spectroscopy, and electron-spin resonance techniques are used. All the investigated samples are characterized by a large specific surface area (~100 m2 per 1 g substance). It is established that the main types of radicals in the obtained structures are N•, Ti3+, Мо5+, V 4+, and W 5+, depending on the composition of the samples. It is shown that nanoheterostructures consisting of several metal oxides have a high photocatalytic activity in the visible spectral region and the ability to accumulate photogenerated charge carriers. As a result, catalytic reactions in the samples continue even after illumination is turned off. A correlation is found between the rate of photocatalysis, the absorption spectra in the visible region, and the concentration of radicals in the studied structures. The results can be used to develop energy-efficient catalytic devices based on nanoheterostructures consisting of titanium, molybdenum, tungsten, and vanadium nanooxides in various combinations which operate under periodic illumination in the visible spectral range. |
| تدمد: | 1090-6479 1063-7826 |
| DOI: | 10.1134/s1063782621020172 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::72bdaf35f8a72350ad8a032fe46cb1f5 https://doi.org/10.1134/s1063782621020172 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........72bdaf35f8a72350ad8a032fe46cb1f5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10906479 10637826 |
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| DOI: | 10.1134/s1063782621020172 |