M‐Doped TiO 2 and TiO 2 –M x O y Mixed Oxides (M = V, Bi, W) by Reactive Mineralization of Cellulose – Evaluation of Their Photocatalytic Activity
| Autor: | Sandrine Plumejeau, André Ayral, Stephan Brosillon, Bruno Boury, Matthieu Rivallin |
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| Rok vydání: | 2016 |
| Předmět: |
Band gap
Doping Inorganic chemistry 02 engineering and technology Nanoflower 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Inorganic Chemistry Metal chemistry.chemical_compound chemistry visual_art Photocatalysis visual_art.visual_art_medium Anhydrous Cellulose 0210 nano-technology Spectroscopy |
| Zdroj: | European Journal of Inorganic Chemistry. 2016:1200-1205 |
| ISSN: | 1099-0682 1434-1948 |
| Popis: | M-doped TiO2 and mixed oxides MxOy–TiO2 (M = V, Bi, W) were synthesized by the reactive mineralization of ash-free filter paper under anhydrous conditions. Mixtures of metal chlorides (TiCl4 with VOCl3, WCl6, or BiCl3) were reacted directly with cellulose, and three different Ti/M atomic ratios were used (99, 19, and 9). The resulting materials consist of original nanoflower assemblies of needle-shaped primary particles. Their physicochemical characteristics were investigated by various techniques (X-ray diffraction, diffuse-reflectance UV/Vis spectroscopy, electron microscopy, and elemental analysis). The incorporation of the doping metal or the formation of mixture of oxides with TiO2 (WO3, Bi2O3) depends on the metal and the proportions used. The photocatalytic activities of the materials were tested for the degradation of phenol. The vanadium-doped materials exhibit true solid-solution formation and their band gaps shift into the visible range. |
| Databáze: | OpenAIRE |
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