0000000000888384

AUTHOR

F. Ajala

showing 2 related works from this author

The influence of Al doping on the photocatalytic activity of nanostructured ZnO: The role of adsorbed water

2018

Abstract Al doped ZnO nanoparticles (labeled as x% A-ZnO, x = 0.0, 0.5, 1.0, and 1.5) were synthesized by a simple sol-gel method, characterized and tested as photocatalysts for the degradation of a model compound under UV-light irradiation. Diffuse reflectance spectroscopy (DRS) and photoelectrochemical analysis have been performed to evidence their optical and electronic behavior. The structural features of the powders were highlighted by means of specific surface area (SSA) analysis, X-ray diffraction (XRD), Fourier-transform infrared (FTIR) and Raman spectroscopy. Al doping results in enhanced photocatalytic activity of the modified powders with respect to pure ZnO. In particular, the h…

Materials scienceDiffuse reflectance infrared fourier transformBand gapAdsorbed water; Al-doped ZnO; Defects; Nanoparticles; Photocatalysis; Sol-gel; ZnO; Surfaces; Coatings and FilmsSettore AGR/13 - Chimica AgrariaGeneral Physics and Astronomy02 engineering and technology010402 general chemistry01 natural sciencesCoatings and Filmssymbols.namesakeNanoparticlePhotocatalysiAl-doped ZnOAdsorptionSpecific surface areaPhotocatalysisFourier transform infrared spectroscopySol-gelAdsorbed waterDopingSurfaces and InterfacesGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics0104 chemical sciencesSurfaces Coatings and FilmsSurfacesAdsorbed water; Al-doped ZnO; Defects; Nanoparticles; Photocatalysis; Sol-gel; ZnO; Surfaces Coatings and FilmsSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiChemical engineeringZnOPhotocatalysissymbolsNanoparticlesDefectsDefect0210 nano-technologyRaman spectroscopyApplied Surface Science
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Electron transfer in ZnO–Fe2O3 aqueous slurry systems and its effects on visible light photocatalytic activity

2017

ZnFex (x = 0.025, 0.05, and 0.1) nanocomposites and pure ZnO and Fe2O3 photocatalysts were synthesized by a simple sol–gel route and characterized by means of specific surface area (SSA) analysis, X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), and transmission electron microscopy/energy dispersive X-ray spectroscopy (TEM/EDS). Their photocatalytic activity was investigated under visible light by using methylene blue (MB) and benzoic acid (BA) as model compounds. Coupling ZnO and Fe2O3 results in higher photocatalytic activity with respect to the pure materials. Photoelectrochemical characterization performed in slurry systems allowed the elucidation of the electronic struc…

Materials scienceDiffuse reflectance infrared fourier transformBand gap02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnologyPhotochemistry01 natural sciencesCatalysis0104 chemical sciencesElectron transferTransmission electron microscopyPhotocatalysisSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie0210 nano-technologySpectroscopyAbsorption (electromagnetic radiation)Visible spectrumCatalysis Science & Technology
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