0000000000888383

AUTHOR

Hinda Lachheb

showing 3 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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TiO2/Ag2O immobilized on cellulose paper: A new floating system for enhanced photocatalytic and antibacterial activities

2021

Paper-TiO2-Ag2O floating photocatalysts were produced under mild condition and their photocatalytic activity for the degradation of aromatic amine under sunlight stimulant was investigated. Characterizations by Raman, XRD, XPS, DRS and PL confirmed the presence of TiO2 and Ag2O, and the morphology of the appended TiO2/Ag2O layer was probed by FE-SEM. The photocatalytic activity of the prepared samples was investigated by the degradation of aniline (AN) in water under simulated sun-light illumination and constrained conditions, i.e. non-stirring and non-oxygenation. The presence of Ag2O combined with TiO2 was shown to improve the resistance of paper to bacteria attack, thus increasing the du…

PaperMaterials science010501 environmental sciences01 natural sciencesBiochemistry03 medical and health sciencessymbols.namesakechemistry.chemical_compound0302 clinical medicineAnilineX-ray photoelectron spectroscopyTiO2–Ag2O heterojunctionPaper TiO2-Ag2O heterojunction Self-cleaning Surface functionalization Floating photocatalyst030212 general & internal medicineCellulose0105 earth and related environmental sciencesGeneral Environmental Sciencechemistry.chemical_classificationAromatic amineSettore CHIM/06 - Chimica OrganicaChemical engineeringchemistrySurface functionalizationsymbolsPhotocatalysisDegradation (geology)Surface modificationRaman spectroscopySelf-cleaningFloating photocatalyst
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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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