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Article Dans Une Revue Environmental Science and Pollution Research Année : 2012

Photocatalytic behavior of nanosized TiO2 immobilized on layered double hydroxides by delamination/restacking process

Šárka Paušová
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Gilles Mailhot
Vanessa Prevot
MI

Résumé

Introduction Efficient immobilization of TiO2 nanoparticles on the surface of Mg2Al-LDH nanosheets was performed by delamination/restacking process. Experimental part The structural and textural properties of as-prepared nanocomposite were deeply analyzed using different solid-state characterization techniques such as: X-ray powder diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopies, chemical analysis, X-ray photoelecton spectroscopy, N2 adsorption-desorption, and electronic microscopy. Results and discussion The photocatalytic properties of immobilized TiO2 nanoparticles on Mg2Al were investigated using the photodegradation of two model pollutants: Orange II and 4-chlorophenol, and compared with pure colloidal TiO2 solution. Conclusion It appears that Orange II photodegradation was systematically faster and more efficient than 4-chlorophenol photodegradation regardless of the medium pH. Moreover under slightly basic conditions, even if the TiO2 photocatalytic efficiency decreases, photodegradation performed in presence of easily recovered TiO2/Mg2Al1.5 nanocomposite gives rise to comparable or better results than pure TiO2.
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Dates et versions

hal-00786374 , version 1 (08-02-2013)

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  • HAL Id : hal-00786374 , version 1

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Šárka Paušová, Josef Krysa, Jaromir Jirkosvsky, Gilles Mailhot, Vanessa Prevot. Photocatalytic behavior of nanosized TiO2 immobilized on layered double hydroxides by delamination/restacking process. Environmental Science and Pollution Research, 2012, 19, pp.3709-3718. ⟨hal-00786374⟩
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