Electrospun Black Titania Nanofibers: Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance
| العنوان: | Electrospun Black Titania Nanofibers: Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance |
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| المؤلفون: | Chiara Maccato, Tero-Petri Ruoko, Andreas Mettenbörger, Leonhard Mayrhofer, Teresa Andreu, Michael Moseler, Michael Walter, Davide Barreca, J. R. Morante, Ashish Lepcha, Axel Klein, Klaus Meerholz, Selina Olthof, Sanjay Mathur |
| المساهمون: | Publica, Tampere University, Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Doctoral Programme in Engineering and Natural Sciences |
| المصدر: | Journal of physical chemistry. C 119 (2015): 18835–18842. doi:10.1021/acs.jpcc.5b02767 info:cnr-pdr/source/autori:Lepcha A.; Maccato C.; Mettenborger A.; Andreu T.; Mayrhofer L.; Walter M.; Olthof S.; Ruoko T.-P.; Klein A.; Moseler M.; Meerholz K.; Morante J.R.; Barreca D.; Mathur S./titolo:Electrospun Black Titania Nanofibers: Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance/doi:10.1021%2Facs.jpcc.5b02767/rivista:Journal of physical chemistry. C/anno:2015/pagina_da:18835/pagina_a:18842/intervallo_pagine:18835–18842/volume:119 |
| بيانات النشر: | American Chemical Society (ACS), 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Materials science, SURFACE, Diffuse reflectance infrared fourier transform, 215 Chemical engineering, Ab initio, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, 010402 general chemistry, NANOSTRUCTURES, DFT, 01 natural sciences, Oxygen, law.invention, X-ray photoelectron spectroscopy, law, NANOPARTICLES, WATER, TiO2, Physical and Theoretical Chemistry, hydrogen treatment, Electron paramagnetic resonance, electrospinning, Photocurrent, Valence (chemistry), INSULATORS, 021001 nanoscience & nanotechnology, experimental-theoretical, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, ROOM-TEMPERATURE, General Energy, chemistry, Chemical engineering, Nanofiber, PHOTOCATALYSIS, 0210 nano-technology |
| الوصف: | This work encompasses a facile method for tailoring surface defects in electrospun TiO2 nanofibers by employing hydrogen plasma treatments. This amiable processing method was proven with SQUID, EPR, and XPS to be highly effective in generating oxygen vacancies, accompanied by the reduction of Ti4+ centers to Ti3+, resulting in the formation of black titania. The treatment temperature was found to affect the Ti3+/Ti4+ ratios and surface valence, while preserving the original 1D morphology of the titania fibers. Ab initio DFT calculations showed that a high concentration of oxygen vacancies is highly efficient in producing midgap states that enhance the system absorption over the whole visible range, as observed with UV/vis/NIR diffuse reflectance spectroscopy. Pristine TiO2 nanofibers produced a photocurrent density of 0.02 mA/cm2 at 1.23 V vs RHE, whereas the hydrogen plasma treatment resulted in up to a 10-fold increase in the photoelectrochemical performance. |
| وصف الملف: | fulltext |
| تدمد: | 1932-7455 1932-7447 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c95571762caf4edd19b0816fdcf58ae https://doi.org/10.1021/acs.jpcc.5b02767 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....8c95571762caf4edd19b0816fdcf58ae |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 19327455 19327447 |
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