Photocatalytic Reduction of Hexavalent Chromium with Nanosized TiO2 in Presence of Formic Acid

Nanosized titanium dioxide (TiO2) nanoparticles were used for the photocatalytic reduction of hexavalent chromium in the presence of formic acid. The photoreduction of Cr(VI) in the absence of formic acid was quite slow. When formic acid was added in the chromium solution as the hole scavenger, a ra...

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Bibliographic Details
Published in:ChemEngineering 2019-06, Vol.3 (2), p.33
Main Authors: Islam, Jahida Binte, Furukawa, Mai, Tateishi, Ikki, Katsumata, Hideyuki, Kaneco, Satoshi
Format: Article
Language:English
Subjects:
Acceleration
Aqueous solutions
Chemical engineering
Chromium
Formic acid
Hexavalent chromium
hole scavenger
Nanoparticles
nanosized TiO2
Oxidation
Particle size
Photocatalysis
photocatalytic reduction
Reduction
Titanium dioxide
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Summary:Nanosized titanium dioxide (TiO2) nanoparticles were used for the photocatalytic reduction of hexavalent chromium in the presence of formic acid. The photoreduction of Cr(VI) in the absence of formic acid was quite slow. When formic acid was added in the chromium solution as the hole scavenger, a rapid photocatalytic reduction of Cr(VI) was observed, owing to the consumption of hole and the acceleration of the oxidation reaction. Furthermore, three commercial TiO2 nanoparticles (AEROXIDE® P25; Ishihara Sangyo ST-01; FUJIFILM Wako Pure Chemical Corp.) were evaluated for the photoactivity of reduction of Cr(VI).
ISSN:2305-7084
2305-7084
DOI:10.3390/chemengineering3020033