Spray Pyrolysis Synthesis of Pure and Mg-Doped Manganese Oxide Thin Films
| Autor: | D. Tonneau, Mohamed Amine Dahamni, Abed Bouadi, S. E. Naceri, Carole Fauquet, M. Ghamnia, Jean-Jacques Pireaux |
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| Přispěvatelé: | Université d'Oran 1 Ahmed Ben Bella [Oran], Université de Relizane, Laboratoire des Sciences de la Matière Condensée, Laboratoire des Sciences de la Matière Condensée (LSMC), Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Université de Namur [Namur] (UNamur), UNITÉ DE RECHERCHE INTERDISCIPLINAIRE DE SPECTROSCOPIE ELECTRONIQUE (LISE), Aix Marseille Université (AMU), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Band gap Scanning electron microscope Analytical chemistry chemistry.chemical_element 02 engineering and technology Manganese [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 01 natural sciences nanograins X-ray photoelectron spectroscopy Materials Chemistry XPS Thin film Spectroscopy [PHYS]Physics [physics] MnO Doping technology industry and agriculture Surfaces and Interfaces 021001 nanoscience & nanotechnology Engineering (General). Civil engineering (General) 0104 chemical sciences Surfaces Coatings and Films Chemical state chemistry TA1-2040 AFM 0210 nano-technology spray pyrolysis |
| Zdroj: | Coatings Volume 11 Issue 5 Coatings, 2021, 11 (5), pp.598. ⟨10.3390/coatings11050598⟩ Coatings, Vol 11, Iss 598, p 598 (2021) Coatings, MDPI, 2021, 11 (5), pp.598. ⟨10.3390/coatings11050598⟩ |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11050598 |
| Popis: | Pure and Mg-doped manganese oxide thin films were synthesized on heated glass substrates using the spray pyrolysis technique. The surface chemical composition was investigated by the use of X-ray photoelectron spectroscopy (XPS). Structural and morphological properties were studied by using X-ray diffraction (XRD), scanning electron microscope (SEM) and atomic force microscopy (AFM). Optical properties were characterized by UV-visible spectroscopy. XPS spectra showed typical Mn (2p3/2), (2p1/2) and O (1s) peaks of Mn3O4 with a slight shift attributed to the formation of different chemical states of manganese. XRD analysis revealed the tetragonal phase of Mn3O4 with a preferred (211) growth orientation that improved with Mg-doping likewise, grain size is observed to increase with the Mg doping. SEM images of Mn3O4 films showed rough surfaces composed of uniformly distributed nanograins whose size decreases with the Mg-doping. The manganese oxide films surface observed in AFM show a textured, rough and porous surface. The combination of transmittance and absorption data in the UV-visible range allowed determining the energy values of the Eg band gap (1.5–2.5 eV). The decrease of the band gap with the Mg-doping increase is attributed to the influence of the greater size of the Mg2+ ion in the manganese oxide lattice. |
| Databáze: | OpenAIRE |
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