Dark reduction of As(V) by accumulated electrons stored in alcoholic TiO2 nanoparticles

IVANA K. LEVY; GRACIELA CUSTO; MARTA I. LITTER; MARTA A. BRUSA; AGUIRRE, MATIAS EZEQUIEL; GRELA, MARÍA ALEJANDRA; ENRIQUE SAN ROMÁN

One Century of the Discovery of Arsenicosis in Latin America (1914-2014): As 2014 - Proceedings of the 5th International Congress on Arsenic in the Environment

CRC Press

Lugar: Nueva York; Año: 2014; p. 802 - 804

Direct evidence is presented that the otherwise thermodynamically forbidden reduction of As(V) by conduction band electrons of the semiconductor can be driven in the dark by accumulated electrons stored in alcoholic TiO2 nanoparticles. Accumulation of electrons and participation in As(V) reduction was directly followed by UV-vis spectrophotometry and by Electron Paramagnetic Resonance, detected as Ti(III) species.