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Fe-doped titanium dioxide synthesized: Photocatalytic activity and mineralization study for azo dye

Paper ID Volume ID Publish Year Pages File Format Full-Text
28047 44057 2012 6 PDF Available
Title
Fe-doped titanium dioxide synthesized: Photocatalytic activity and mineralization study for azo dye
Abstract

Photocatalytic bleaching and mineralization of the dye Cibacron Yellow LS-R using Fe-doped TiO2 synthesized and Aeroxide TiO2 P25 have been investigated. The Fe-doped TiO2 samples were synthesized by sol–gel method combined with solvothermal treatment at short crystallization time (2 h) and low temperature (200 °C), using tetraisopropyl orthotitanate as Ti-precursor, iron (III) nitrate as Fe-precursor and 2-propanol as solvent. Different Fe:Ti molar ratios (0.5%, 1%, 1.5% and 2%) were evaluated. 0.5% Fe-doped TiO2 had the best photocatalytic performance among Fe doped samples, however it showed a low photocatalytic activity in the dye Cibacron Yellow LS-R photodegradation compared with Aeroxide TiO2 P25. This result perhaps is due to the poor ability of the Fe-doped TiO2 to produce hydroxyl radicals under UV irradiation, which was measured using fluorescence method, and its size particle which could be very large for the iron load in the sample, compared with those reported in the literature as appropriate.

► Fluoride ion enhanced the generation of free OH, reducing recombination rate. ► Fluoride ion mineralization rate was higher than nitrate and sulfate mineralization. ► Fluorescence and TEM analysis could explain low degradation for iron doped titania. ► Hydroxyl radical production was tested using coumarin as a probe molecule.

Keywords
Photocatalysis; Iron-doped titania; Azo dye; Mineralization; Fluorescence measurement
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Fe-doped titanium dioxide synthesized: Photocatalytic activity and mineralization study for azo dye
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 243, 1 September 2012, Pages 17–22
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us