Porous Mn-doped ZnO nanoparticles for enhanced solar and visible light photocatalysis
| Autor: | Kevin Mozet, Raphaël Schneider, Ahmed Ghrabi, Emilien Girot, Lavinia Balan, Myriam Ben Said, Serge Corbel, Ghouti Medjahdi, Faouzi Achouri |
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| Přispěvatelé: | Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Institut Jean Lamour (IJL), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), PHC Utique |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Diffuse reflectance infrared fourier transform Nanoparticle 02 engineering and technology 010402 general chemistry Photochemistry Mn-doped ZnO 7. Clean energy 01 natural sciences Porous nanoparticles symbols.namesake Specific surface area Oxidation General Materials Science Photocatalysis Photodegradation [SDE.IE]Environmental Sciences/Environmental Engineering Mechanical Engineering [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology 0104 chemical sciences Mechanics of Materials symbols 0210 nano-technology Raman spectroscopy BET theory Visible spectrum |
| Zdroj: | Materials and Design Materials and Design, Elsevier, 2016, 101, pp.309-316. ⟨10.1016/j.matdes.2016.04.015⟩ |
| ISSN: | 0264-1275 |
| DOI: | 10.1016/j.matdes.2016.04.015 |
| Popis: | International audience; Porous Mn-doped ZnO (ZnO:Mn) nanoparticles with an average diameter of ca. 21 nm were prepared by a simple and cheap solvothermal process involving no templates, post-synthetic annealing or etching. The particles produced were characterized by XRD, Raman spectroscopy, SEM, TEM, XPS, diffuse reflectance spectroscopy and BET surface area measurements and the effects of Mn2+-doping on the structural, optical and photocatalytic properties of ZnO particles were investigated. The particles doped with 3 mol% Mn2+ were found to exhibit the highest catalytic activity toward the photodegradation of the Orange II dye under solar light irradiation. Our results demonstrate that Mn2+-doping shifts the optical absorption to the visible region, increases the specific surface area of the photocatalyst and reduces the recombination of electron-hole pairs. The influence of various operational parameters (amount of catalyst, concentration of dye and pH) on the photodegradation and the photocatalytic mechanism were studied. Finally, we demonstrated that the ZnO:Mn photocatalyst is stable and can be easily recycled up to ten times without any significant decrease in photocatalytic activity. |
| Databáze: | OpenAIRE |
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