Mesoporous pyrophyllite–titania nanocomposites: synthesis and activity in phenol photocatalytic degradation

Pyrophyllite–TiO 2 nanocomposite PTi750 was successfully synthesized using a sol–gel method at ambient temperature based on exfoliation of the pyrophyllite layered clay by incorporation of the TiO 2 precursor titanium(IV) t -butoxide. PTi750 exhibited higher photocatalytic activity in phenol degrada...

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Bibliographic Details
Published in:Research on chemical intermediates 2019-02, Vol.45 (2), p.333-353
Main Authors: El Gaidoumi, Abdelali, Doña-Rodríguez, José Miguel, Pulido Melián, Elisenda, González-Díaz, Oscar Manuel, El Bali, Brahim, Navío, José Antonio, Kherbeche, Abdelhak
Format: Article
Language:English
Subjects:
Ambient temperature
Catalysis
Catalytic activity
Chemistry
Chemistry and Materials Science
Clay minerals
Fourier transforms
Hydrogen peroxide
Infrared analysis
Inorganic Chemistry
Microscopy
Nanocomposites
Phenols
Photocatalysis
Photodegradation
Photoelectrons
Physical Chemistry
Pyrophyllite
Reflectance
Scanning electron microscopy
Sol-gel processes
Spectrophotometry
Spectrum analysis
Titanium dioxide
Transmission electron microscopy
Ultraviolet reflection
X ray fluorescence analysis
X ray photoelectron spectroscopy
X-ray diffraction
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Summary:Pyrophyllite–TiO 2 nanocomposite PTi750 was successfully synthesized using a sol–gel method at ambient temperature based on exfoliation of the pyrophyllite layered clay by incorporation of the TiO 2 precursor titanium(IV) t -butoxide. PTi750 exhibited higher photocatalytic activity in phenol degradation compared with commercial TiO 2 Aeroxide P25. Ag-photodeposited PTi750 was more photoactive than PTi750, exhibiting detoxification, total degradation, and good mineralization of polluted solution and excellent stability after five reuses at optimal conditions in terms of the parameters pH, H 2 O 2 concentration, and photocatalyst amount. The nanocomposites were investigated using several techniques, viz. diffuse-reflectance ultraviolet–visible (UV–Vis) spectrophotometry, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction analysis, X-ray fluorescence spectroscopy, Fourier-transform infrared spectroscopy, and Brunauer–Emmett–Teller (BET) specific surface area measurements.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-018-3605-8