Photochemical hydrogen production of Ta2O5 nanotubes decorated with NiO nanoparticles by modified sputtering deposition
| العنوان: | Photochemical hydrogen production of Ta2O5 nanotubes decorated with NiO nanoparticles by modified sputtering deposition |
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| المؤلفون: | Jocenir Boita, Renato V. Gonçalves, Giovanna Machado, Pedro Migowski, Heberton Wender, Dario Eberhardt, Jairton Dupont, Adriano F. Feil, Sérgio R. Teixeira, Sherdil Khan |
| المصدر: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Thermal oxidation, Materials science, Inorganic chemistry, Non-blocking I/O, Oxide, Nanoparticle, 02 engineering and technology, Sputter deposition, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, General Energy, chemistry, Photocatalysis, Physical and Theoretical Chemistry, TÂNTALO, 0210 nano-technology, Photocatalytic water splitting, Hydrogen production, Nuclear chemistry |
| الوصف: | The use of metal/oxide nanoparticles (NPs) as cocatalysts in heterogeneous photocatalysis is an important strategy to improve the photocatalytic activity of semiconductors for hydrogen generation. This article reports the use of a modified sputtering deposition method to prepare ultrafine NiO NPs cocatalysts dispersed on anodic Ta2O5 nanotubes (NTs). In situ X-ray absorption near-edge spectroscopy (XANES) measurements revealed that after exposing the as-prepared Ni NPs to air atmosphere a mixture of 68% of Ni and 32% of NiO was formed. Pure phase NiO NPs was successfully obtained after a controlled thermal oxidation at 500 °C which was confirmed by in situ XANES and ex situ XPS analyses. The photocatalytic hydrogen production activity was evaluated using ethanol as a sacrificial agent. Ta2O5 NTs with 0.16 wt % of NiO showed superior photocatalytic activity (up to 7.7 ± 0.3 mmol h–1 g–1) as compared to pure Ta2O5 NTs (4.9 ± 0.3 mmol h–1 g–1) The observed higher photocatalytic activity suggests that NiO/Ta2... |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a01ed3e257cfb6e146db41f31d051482 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....a01ed3e257cfb6e146db41f31d051482 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |