Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 372, Issue -, Pages 37-44Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2018.12.090
Keywords
TiO2 nanotubes; Cobalt ferrite; Nanocomposite photocatalyst; 4-nitrophenol reduction
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Funding
- Prince Sultan Bin Abdulaziz International Prize for Water (PSIPW)-Alternative Water Resources Prize 2014
- Science Achievement Scholarship of High Education Ministry of Egypt
- Hellenic Ministry of Foreign Affairs
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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 photo catalytic 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 (similar to 100 m(2)/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 photo catalytic 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.
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