Τίτλος:
Photocatalysis as an advanced reduction process (ARP): The reduction of 4-nitrophenol using titania nanotubes-ferrite nanocomposites
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
TiO2 photocatalysis is an advanced process, employed worldwide for the oxidation of organic compounds, that leads to significant technological applications in the fields of health and environment. The use of the photocatalytic approach in reduction reactions seems very promising and can open new horizons for green chemistry synthesis. For this purpose, titanium dioxide nanotubes (TNTs) were developed in autoclave conditions using TiO2 P25 as a precursor material. Based on these nanotubular substrates, TiO2/CoFe2O4 (TCF) nanocomposites were further obtained by wet impregnation method. The materials were thoroughly characterized and their structural, textural, vibrational, optoelectronic and magnetic properties were determined. The composite materials combine absorbance in the visible optical range and high BET surface area values (˜100 m2/g), showing extremely high yield in the photocatalytic reduction of 4-nitrophenol (4-NP), exceeding 94% within short illumination time (only 35 min). The developed nanocomposites were successfully reused in consecutive photocatalytic experiments and were easily removed from the reaction medium using magnets. Both remarkable recycling ability and high-performance stability in the photocatalytic reduction of nitrophenol were observed, thus justifying the significant economic potential and industrial perspectives for this advanced reduction process. © 2018 Elsevier B.V.
Συγγραφείς:
Ibrahim, I.
Athanasekou, C.
Manolis, G.
Kaltzoglou, A.
Nasikas, N.K.
Katsaros, F.
Devlin, E.
Kontos, A.G.
Falaras, P.
Περιοδικό:
Journal of Hazardous Materials
Λέξεις-κλειδιά:
Ferrite; Nanocomposites; Nanotubes; Oxide minerals; Phenols; Photocatalysis; Titanium dioxide, 4-Nitrophenol reductions; Cobalt ferrites; Health and environment; Photocatalytic reduction; Technological applications; TiO2 nanotubes; Titanium dioxide nanotubes; Wet impregnation method, TiO2 nanoparticles, 4 nitrophenol; cobalt; ferrite; nanocomposite; nanotube; titanium dioxide, catalysis; catalyst; cobalt; nanocomposite; nanotube; organic compound; phenolic compound; photolysis; reduction; technological change, comparative study; controlled study; degradation; electron transport; green chemistry; illumination; infrared spectroscopy; magnetic separation; nanotechnology; photocatalysis; Raman spectrometry; recycling; reduction (chemistry); reduction kinetics; scanning electron microscopy; surface area; ultraviolet irradiation; X ray powder diffraction
DOI:
10.1016/j.jhazmat.2018.12.090
