Highly toxic o-toluidine pollutant was photo-degraded in water by using ZnO nanoparticles. The tested powders were both commercial and laboratory-made, the latter obtained by means of two innovative synthetic procedures. The disappearance and the relative mineralization of the molecule were followed by HPLC/UV and TOC determinations, respectively. Intermediate products were identified by coupling LC/MS of the eluate after 3 h of reaction and ATR-FTIR analyses of the used ZnO powders at the end of photocatalytic tests. Selected degradation paths, characterized by different kinetic degradation rates, can be suggested as a function of the different surface texture, the effective photocatalytic active area andthe e−/h+recombination processes of the ZnO particles.

Photo-mineralization of noxious o-toluidine water pollutant by nano-ZnO: The role of the oxide surface texture on the kinetic path

CERRATO, Giuseppina;MORANDI, Sara;
2015

Abstract

Highly toxic o-toluidine pollutant was photo-degraded in water by using ZnO nanoparticles. The tested powders were both commercial and laboratory-made, the latter obtained by means of two innovative synthetic procedures. The disappearance and the relative mineralization of the molecule were followed by HPLC/UV and TOC determinations, respectively. Intermediate products were identified by coupling LC/MS of the eluate after 3 h of reaction and ATR-FTIR analyses of the used ZnO powders at the end of photocatalytic tests. Selected degradation paths, characterized by different kinetic degradation rates, can be suggested as a function of the different surface texture, the effective photocatalytic active area andthe e−/h+recombination processes of the ZnO particles.
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ZnO nanoparticles; Photodegradation; o -Toluidine; LC/MS; Kinetic paths
V. Pifferi; G. Cappelletti; S. Ardizzone; L. Falciola; C. Di Bari; F. Spadavecchia; D. Meroni; A. Carrà; G. Cerrato; S. Morandi; E. Davoli
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/157877
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