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

1
Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie 514-8507, Japan
2
Global Environment Center for Education & Research, Mie University, Mie 514-8507, Japan
*
Author to whom correspondence should be addressed.
ChemEngineering 2019, 3(2), 33; https://doi.org/10.3390/chemengineering3020033
Received: 5 February 2019 / Revised: 12 March 2019 / Accepted: 29 March 2019 / Published: 2 April 2019
(This article belongs to the Special Issue TiO2 Nanoparticles: Synthesis and Applications)
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Abstract

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). View Full-Text
Keywords: photocatalytic reduction; hexavalent chromium; nanosized TiO2; hole scavenger; formic acid photocatalytic reduction; hexavalent chromium; nanosized TiO2; hole scavenger; formic acid
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Islam, J.B.; Furukawa, M.; Tateishi, I.; Katsumata, H.; Kaneco, S. Photocatalytic Reduction of Hexavalent Chromium with Nanosized TiO2 in Presence of Formic Acid. ChemEngineering 2019, 3, 33.

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