Photocatalytic behavior of nanosized TiO2 immobilized on layered double hydroxides by delamination/restacking process |
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Authors: | ?árka Pau?ová Josef Krysa Jaromír Jirkovsky Gilles Mailhot Vanessa Prevot |
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Institution: | 1. Institute of Chemical Technology Prague, Technicka 5, 166-28, Prague, Czech Republic 3. Clermont Universit??, Universit?? Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000, Clermont-Ferrand, France 4. CNRS, ICCF, UMR 6296, 63177, Aubi??re, France 2. J. Heyrovsky Institute of Physical Chemistry, Dolej?kova 3, 182-23, Prague, Czech Republic
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Abstract: | 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?Cdesorption, 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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