Exploiting electron storage in TiO2 nanoparticles for dark reduction of As(V) by accumulated electrons

Ivana K. Levy; Marta A. Brusa; Matias E. Aguirre; Graciela Custo; Enrique San Román; Marta I. Litter; María A. Grela

doi:10.1039/C3CP51349A

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Exploiting electron storage in TiO₂nanoparticles for dark reduction of As(v) by accumulated electrons†

Ivana K. Levy,^ab Marta A. Brusa,^c Matias E. Aguirre,^c Graciela Custo,^a Enrique San Román,^b Marta I. Litter^a and María A. Grela*^c

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* Corresponding authors

^a Gerencia Química, Comisión Nacional de Energía Atómica, Avenida General Paz 1499, 1650 San Martín, Prov. de Buenos Aires, Argentina
Fax: +54-11-6772 7886
Tel: +54-11-6772 7016

^b INQUIMAE/DQIAyQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Guiraldes 2160, Ciudad Universitaria – C1428EGA, Buenos Aires, Argentina
Fax: +54-11-4576 3341
Tel: +54-11-4576 3300

^c Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Dean Funes 3350 – B7602AYL, Buenos Aires, Argentina
E-mail: magrela@mdp.edu.ar
Fax: +54-223-4753150
Tel: +54-223-4756167

Abstract

UV irradiation of an ethanolic sol of TiO₂ nanoparticles produces a trapped Ti(III) centre and a noticeable Burstein shift. Direct evidence that the accumulated charges can drive the otherwise forbidden reduction of As(V) by conduction band electrons is presented.

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Article information

DOI: https://doi.org/10.1039/C3CP51349A
Article type: Communication
Submitted: 30 Mar 2013
Accepted: 11 May 2013
First published: 13 May 2013

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Phys. Chem. Chem. Phys., 2013,15, 10335-10338

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Exploiting electron storage in TiO₂ nanoparticles for dark reduction of As(V) by accumulated electrons

I. K. Levy, M. A. Brusa, M. E. Aguirre, G. Custo, E. S. Román, M. I. Litter and M. A. Grela, Phys. Chem. Chem. Phys., 2013, 15, 10335 DOI: 10.1039/C3CP51349A

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