0000000000385789

AUTHOR

Roland Habchi

showing 4 related works from this author

Optical and structural properties of Al 2 O 3 doped ZnO nanotubes prepared by ALD and their photocatalytic application

2018

Abstract Al2O3 doped ZnO nanotubes with controlled ratio of Al2O3 were successfully designed by combining the two techniques of atomic layer deposition (ALD) and electrospinnig. In order to study the effect of Al2O3 doping on optical and structural properties of Al2O3 doped ZnO nanotubes, the prepared samples were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared (FTIR), reflectance emission and room temperature photoluminescence (PL). The photocatalytic activity and stability of these materials under UV light was studied by the photodegradation of methyl orange (MO). The results indicate that Al2O…

PhotoluminescenceMaterials scienceScanning electron microscopeDoping02 engineering and technologySurfaces and InterfacesGeneral Chemistry010402 general chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciences0104 chemical sciencesSurfaces Coatings and FilmsAtomic layer depositionchemistry.chemical_compoundchemistryChemical engineeringMaterials ChemistryMethyl orangePhotocatalysis[CHIM]Chemical SciencesFourier transform infrared spectroscopy0210 nano-technologyPhotodegradationComputingMilieux_MISCELLANEOUS
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Enhanced photocatalytic performance of novel electrospun BN/TiO 2 composite nanofibers

2017

International audience; High activity boron nitride/titanium dioxide (BN/TiO2) composite nanofiber photocatalysts were synthesized for the first time via the electrospinning technique. The as-spun nanofibers with a controlled ratio of boron nitride nanosheets (BN) were calcined under air at 500 °C for 4 hours. Their morphological, structural and optical properties were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), BET surface area, Fourier-transform infrared (FTIR), Raman spectroscopy, UV-Visible spectrophotometry and room temperature photoluminescence (PL). The effect of loading different BN sheet amounts on the photocat…

Scanning electron microscope02 engineering and technologyGeneral Chemistry[CHIM.MATE]Chemical Sciences/Material chemistry[CHIM.CATA]Chemical Sciences/Catalysis010402 general chemistry021001 nanoscience & nanotechnology7. Clean energy01 natural sciencesCatalysisElectrospinning0104 chemical scienceschemistry.chemical_compoundchemistryChemical engineeringBoron nitrideSpecific surface areaNanofiberTitanium dioxideMaterials ChemistryMethyl orangePhotocatalysis0210 nano-technology
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Synthesis of novel ZnO/ZnAl2O4 multi co-centric nanotubes and their long-term stability in photocatalytic application

2016

Based on the Kirkendall effect, novel double, triple and quadruple co-centric nanotubes of ZnO/ZnAl2O4 have been successfully fabricated by combining the two techniques of electrospinning and atomic layer deposition. The as-prepared samples were annealed at 900 °C under air. Their morphological, structural and optical properties were studied by Scanning Electron Microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Energy-Dispersive X-ray spectroscopy (EDX), UV-visible spectrophotometry, Raman spectroscopy, photoluminescence (PL) and reflectance emission. The performances and long-term stability of these multi co-centric nanotubes for photocatalytic applications…

PhotoluminescenceMaterials scienceScanning electron microscopeGeneral Chemical EngineeringAnalytical chemistry02 engineering and technologyGeneral Chemistry010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences7. Clean energy0104 chemical scienceschemistry.chemical_compoundAtomic layer depositionsymbols.namesakechemistryTransmission electron microscopyMethyl orangePhotocatalysissymbols[CHIM]Chemical Sciences0210 nano-technologyPhotodegradationRaman spectroscopyComputingMilieux_MISCELLANEOUSRSC Advances
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High photodegradation and antibacterial activity of BN–Ag/TiO 2 composite nanofibers under visible light

2018

To develop material with good photocatalytic properties for organic compound degradation and bacterial removal, we produced Ag/TiO2 and BN–Ag/TiO2 composite nanofibers that included controlled amounts of boron nitride (BN) nanosheets and silver (Ag). After annealing at 500 °C under air, we used scanning electron microscopy, transmission electron microscopy, Brunauer–Emmet–Teller analysis, X-ray diffraction, energy-dispersive X-ray spectroscopy, Raman spectroscopy, UV-visible reflectance spectroscopy and room temperature photoluminescence to investigate the morphological, structural and optical properties of all samples. The photocatalytic tests using methylene blue under visible light, in r…

Annealing (metallurgy)Scanning electron microscope02 engineering and technologyGeneral Chemistry010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesCatalysis0104 chemical scienceschemistry.chemical_compoundsymbols.namesakechemistryBoron nitrideTransmission electron microscopyMaterials ChemistryPhotocatalysissymbols[CHIM]Chemical Sciences0210 nano-technologyPhotodegradationRaman spectroscopyComputingMilieux_MISCELLANEOUSNuclear chemistryVisible spectrum
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