Role of Fe doping in tuning photocatalytic and photoelectrochemical properties of TiO2 for photodegradation of methylene blue

•The undoped and Fe-doped TiO2 nanoparticles were synthesized by sol-gel route.•The Fe-doped TiO2 nanoparticles exhibited high photocatalytic activity.•A method for evaluating the electrochemical performance is proposed.•Room temperature paramagnetic behaviour was observed.•The reduction of band gap...

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Bibliographic Details
Published in:Optics and laser technology 2019-10, Vol.118, p.170-178
Main Authors: Majeed Khan, M.A., Siwach, Rahul, Kumar, Sushil, Alhazaa, Abdulaziz N.
Format: Article
Language:English
Subjects:
Anatase
Cyclic voltammetry
Doping
Fe-doped TiO2
Iron
Iron oxides
Light
Methylene blue
Nanoparticles
Optical properties
Photocatalysis
Photodegradation
Raman spectroscopy
Size distribution
Sol-gel processes
Solar photocatalytic degradation
Titanium dioxide
X ray photoelectron spectroscopy
X-ray diffraction
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Summary:•The undoped and Fe-doped TiO2 nanoparticles were synthesized by sol-gel route.•The Fe-doped TiO2 nanoparticles exhibited high photocatalytic activity.•A method for evaluating the electrochemical performance is proposed.•Room temperature paramagnetic behaviour was observed.•The reduction of band gap from 3.31 eV to 3.10 eV was obtained. In this work, undoped and iron doped titania nanoparticles (Fe:TiO2 NPs) were successfully prepared by sol-gel route with two different Fe concentration (5 and 10 mol.%). The effects of Fe doping into TiO2 were thoroughly investigated by XRD, TEM, HRTEM, XPS, FTIR, Raman, UV–Visible spectroscopy and VSM. The obtained nanoparticles have narrow size distribution 41–49 nm and were recognized as anatase TiO2 structure with no signature of Fe cluster or iron oxides as analyzed by X-ray diffraction and Raman. The optical band gap of undoped and iron doped TiO2 NPs is red shifted with respect to the incorporation of iron content. Room temperature M-H loops revealed that all the samples showed a significant paramagnetic behaviour. The enhanced photocatalytic performance was observed for iron doped titania nanoparticles compared with pure TiO2 NPs in respect of methylene blue dye degradation in aqueous suspension under visible light illumination.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2019.05.012