Photocatalytic behavior of nanosized TiO2 immobilized on layered double hydroxides by delamination/restacking process.
BACKGROUND
Efficient immobilization of TiO(2) nanoparticles on the surface of Mg(2)Al-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, N(2) adsorption-desorption, and electronic microscopy.


CONCLUSIONS
The photocatalytic properties of immobilized TiO(2) nanoparticles on Mg(2)Al were investigated using the photodegradation of two model pollutants: Orange II and 4-chlorophenol, and compared with pure colloidal TiO(2) solution.


CONCLUSIONS
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 TiO(2) photocatalytic efficiency decreases, photodegradation performed in presence of easily recovered TiO(2)/Mg(2)Al(1.5) nanocomposite gives rise to comparable or better results than pure TiO(2).
Institute of Chemical Technology Prague, Technicka 5, 166-28, Prague, Czech Republic.
Sárka
S
Paušová
Josef
J
Krýsa
Jaromír
J
Jirkovský
Gilles
G
Mailhot
Vanessa
V
Prevot
D000535:Aluminum / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry; D001557:Benzenesulfonates / Q000737:chemistry; D002733:Chlorophenols / Q000737:chemistry; D004785:Environmental Pollutants / Q000737:chemistry; D052918:Environmental Restoration and Remediation / Q000379:methods; D008274:Magnesium / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D010782:Photolysis; D014025:Titanium / Q000737:chemistry*
D001391:Azo Compounds; D001557:Benzenesulfonates; D002733:Chlorophenols; D004785:Environmental Pollutants; C009495:titanium dioxide; C029107:4-chlorophenol; D000535:Aluminum; D014025:Titanium; D008274:Magnesium; C014722:2-naphthol orange