Effect of silver doping on the photocatalytic activity of TiO2 nanopowders synthesized by the sol-gel route
| Autor: | A. Zertal, Kamel Guergouri, M. Zaabat, S. Gazaout, Regis Barille, S. Djebabra, S. Abbad |
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| Přispěvatelé: | Propriétés Optiques des Matériaux et Applications (POMA), Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
[PHYS]Physics [physics]
Anatase Materials science Process Chemistry and Technology Doping 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Pollution law.invention Transmission electron microscopy law Photocatalysis Chemical Engineering (miscellaneous) Calcination Fourier transform infrared spectroscopy 0210 nano-technology Spectroscopy Waste Management and Disposal ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Sol-gel Nuclear chemistry |
| Zdroj: | Journal of Environmental Chemical Engineering Journal of Environmental Chemical Engineering, Elsevier, 2020, 8 (3), pp.103718. ⟨10.1016/j.jece.2020.103718⟩ |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2020.103718⟩ |
| Popis: | Nanopowders of TiO2 and Ag-TiO2 have been synthesized by the sol-gel route. The obtained gels were calcined at 500 °C to obtain desired nanopowders. The characterization was done by X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Ultraviolet-Visible Spectroscopy (UV–Vis) and Fourier Transform Infrared Spectroscopy (FTIR). The photocatalytic activity of TiO2 and Ag-TiO2 was evaluated by measuring the degradation of Methylene blue (MB) under UV irradiation. All obtained nanopowders exhibit peaks of anatase structure with an average grain size varying between 18 nm and 16 nm, which is well supported by TEM micrographs showing that the shape of nanopowders is spherical. The band-gap energy varies between 3.22 eV and 2.67 eV as a function of Ag concentration. FTIR spectra showed TiO2 peaks identified as: Ti-O-Ti metal bond in all samples. The photocatalysis experiments demonstrated that the degradation of MB is higher for Ag-TiO2 and increases when Ag concentration increases. |
| Databáze: | OpenAIRE |
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