Visible Light Photocatalytic Activities of Iron and Nickel Co-doped Titania Thin Films
Abstract
Iron and nickel doped TiO2 thin films were prepared on glass slides by using sol-gel
and dip coating techniques. X-Ray Diffraction (XRD) analysis showed that there may be a
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solid state solubility limit of 2% on atomic basis and Fe/Ni oxide phases may be formed on
the TiO2 grain boundaries beyond this doping level. Diffuse Reflectance Spectroscopy (UVVIS
DRS) analysis showed that light absorption range of TiO2 was extended to visible light
region by Fe and Ni doping. Visible light photocatalytic activities of the prepared films were
determined by methylene blue degradation experiments. The highest activities were obtained
with 5% Fe and 1% Ni monodoped TiO2 films as 22% and 28%, respectively. TiO2 films codoped
with 1-5% Fe-Ni were prepared in the light of these findings and the highest activity
(34%) was achieved with 2% Fe-2% Ni co-doped TiO2 film. It was concluded that an
optimum nanophase structure and optical properties were achieved at this co-doping level.
Keywords
References
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Details
Primary Language
English
Subjects
Engineering
Journal Section
-
Publication Date
December 30, 2015
Submission Date
January 25, 2016
Acceptance Date
-
Published in Issue
Year 2015 Volume: 5 Number: 2