To conclude, TiO2 nanoparticles doped with different molar
concentrations of Fe (III) ions were successfully fabricated by an
ultrasonic assisted hydrothermal method followed by calcination.
Fe (III) doped TiO2 nanoparticles possess small size, hence larger
surface areas, more adsorbed OH groups and high visible light
response. From PL studies it was confirmed that optimal doping
of Fe (III) ions into TiO2 matrix leads to the inhibition of
recombination of charge carriers thereby, enhancing photochemical
quantum efficiency. All this contribute to their excellent
photocatalytic activity for the degradation of para nitrophenol
and Methylene Blue dye under visible irradiation. Also, the effect
of Fe dopant on photocatalytic behavior of TiO2 nanoparticles
Fig. 11. (a) UV–vis absorbance spectra of visible light induced degradation of Methylene Blue dye aqueous solution (10 mg/L), (0.075 mol% Fe-doped TiO2 nanoparticles,
Catalyst dose: 0.05 gm /L, pH: 7); (b) Effect of Fe doping on % degradation rate of MB.
Fig. 12. Schematic diagram of mechanism of photocatalytic reaction taking place on the surface of Fe doped TiO2 nanoparticles.
222 S. Sood et al. / Journal of Colloid and Interface Science 450 (2015) 213–223
was critically examined. The maximum degradation rate of paranitrophenol
was 92% in 5 h when the Fe molar concentration was
0.05 mol%, without addition of any oxidizing agents. So, this work
is presented as a promising and easy work in the field of environmental
remediation in treatment of highly stable and toxic molecules
such as nitrophenols and dyes
To conclude, TiO2 nanoparticles doped with different molarconcentrations of Fe (III) ions were successfully fabricated by anultrasonic assisted hydrothermal method followed by calcination.Fe (III) doped TiO2 nanoparticles possess small size, hence largersurface areas, more adsorbed OH groups and high visible lightresponse. From PL studies it was confirmed that optimal dopingof Fe (III) ions into TiO2 matrix leads to the inhibition ofrecombination of charge carriers thereby, enhancing photochemicalquantum efficiency. All this contribute to their excellentphotocatalytic activity for the degradation of para nitrophenoland Methylene Blue dye under visible irradiation. Also, the effectof Fe dopant on photocatalytic behavior of TiO2 nanoparticlesFig. 11. (a) UV–vis absorbance spectra of visible light induced degradation of Methylene Blue dye aqueous solution (10 mg/L), (0.075 mol% Fe-doped TiO2 nanoparticles,Catalyst dose: 0.05 gm /L, pH: 7); (b) Effect of Fe doping on % degradation rate of MB.Fig. 12. Schematic diagram of mechanism of photocatalytic reaction taking place on the surface of Fe doped TiO2 nanoparticles.222 S. Sood et al. / Journal of Colloid and Interface Science 450 (2015) 213–223was critically examined. The maximum degradation rate of paranitrophenolwas 92% in 5 h when the Fe molar concentration was0.05 mol%, without addition of any oxidizing agents. So, this workis presented as a promising and easy work in the field of environmentalremediation in treatment of highly stable and toxic moleculessuch as nitrophenols and dyes
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