Nitrate Removal on a Cu/Cu2O Photocathode under UV Irradiation and Bias Potential
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Data
2013-01-01
Autores
Paschoal, Fabiana Maria Monteiro [UNESP]
Nuñez, Luciana [UNESP]
De Vasconcelos Lanza, Marcos Roberto
Zanoni, Maria Valnice Boldrin [UNESP]
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Resumo
The present work describes a suitable method for treatment of water contaminated with nitrate by using a photoelectrochemical method. A Cu/Cu 2O electrodeposited electrode is used as photocathode with long-term stability under UV irradiation and applied potential of +0.2 V vs Ag/AgCl. In this condition 93% of nitrate is removed after 75 min of photoelectrolysis conducted in NaCl 0.07 mol L-1 and pH = 7. Nitrate reduction on Cu/Cu2O photoelectrodes occurs in the cathodic compartment cell via electrons generated under UV irradiation, as expected for a p-type electrode leading to 42% of remaining nitrite and 52% gaseous nitrogen derived, respectively. ©2013 Science & Technology Network, Inc.
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Cu/Cu2O electrode, Nitrate reduction, Nitrogen selectivity, Photoelectrocatalytic reduction
Como citar
Journal of Advanced Oxidation Technologies, v. 16, n. 1, p. 63-70, 2013.