Photocatalytic hydrogen production from methanol over Nd/TiO2
| Autor: | Anna Rokicińska, Miroslava Edelmannová, Dana Dvoranová, Libor Čapek, Martin Reli, Piotr Kuśtrowski, Ivana Troppová, Kamila Kočí, Helena Drobná |
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| Rok vydání: | 2018 |
| Předmět: |
Chemistry
General Chemical Engineering General Physics and Astronomy chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Neodymium Fluorescence spectroscopy 0104 chemical sciences symbols.namesake X-ray photoelectron spectroscopy Specific surface area Photocatalysis symbols Crystallite 0210 nano-technology Spectroscopy Raman spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 366:55-64 |
| ISSN: | 1010-6030 |
| DOI: | 10.1016/j.jphotochem.2018.03.007 |
| Popis: | Nd modified TiO2 photocatalysts containing 0.15–1.5 wt.% of Nd (wt.% Nd determined by XRF) as well as parent TiO2 were investigated for the photocatalytic oxidation of CH3OH. The photocatalysts were prepared by the common sol-gel method followed by thermal treatment. The textural, structural and electronic properties of all synthesized photocatalysts were characterized by nitrogen physisorption, powder X-ray diffraction, X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy, Raman spectrometry, DR UV–vis spectroscopy, electron paramagnetic resonance spectroscopy and photoelectrochemical measurements. It was revealed that all materials show comparable band gap energy and phase composition. However, the addition of different amounts of Nd in the range of 0.15–1.5 wt.% significantly affected the TiO2 crystallite size, the specific surface area, the amount of surface O species and subsequently also the photocurrent response. The positive role of neodymium was proved at its very low loading, i.e. for Nd/TiO2 with 0.15 wt.% Nd which exhibited the highest photocatalytic activity. The photocatalytic activity was promoted by both increasing crystallite size of TiO2 and decreasing amount of surface O species. |
| Databáze: | OpenAIRE |
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