The photodegradation of the highly toxic o-toluidine pollutant was deeply investigated both under UV and solar irradiations by using three different semiconductors: pure ZnO, Bi-impregnated ZnO, and Bi2O3 nanopowders (synthesized by precipitating method). All the samples were deeply characterized on structural, morphological, surface, and optical points of view. The disappearance and the relative mineralization of o-toluidine molecules were followed by linear sweep voltammetry (LSV) and total organic carbon (TOC) determinations, respectively. Hence, correlations between their physico-chemical properties and the photocatalytic performances, passing from UV to solar light, were drawn and a hypothesis on the photodegradation mechanism has been proposed, on the basis of the HPLC/MS results. Bare Bi2O3 samples, due to the exploitation of both their visible light absorption and the negligible intermediates formation, resulted to be higher performing under solar irradiation than either pure or Bi-doped ZnO nanopowders.

Pargoletti, E., Mostoni, S., Rassu, G., Pifferi, V., Meroni, D., Falciola, L., et al. (2017). Zn- vs Bi-based oxides for o-toluidine photocatalytic treatment under solar light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL, 24(9), 8287-8296 [10.1007/s11356-017-8430-x].

Zn- vs Bi-based oxides for o-toluidine photocatalytic treatment under solar light

Mostoni, S
Secondo
;
2017

Abstract

The photodegradation of the highly toxic o-toluidine pollutant was deeply investigated both under UV and solar irradiations by using three different semiconductors: pure ZnO, Bi-impregnated ZnO, and Bi2O3 nanopowders (synthesized by precipitating method). All the samples were deeply characterized on structural, morphological, surface, and optical points of view. The disappearance and the relative mineralization of o-toluidine molecules were followed by linear sweep voltammetry (LSV) and total organic carbon (TOC) determinations, respectively. Hence, correlations between their physico-chemical properties and the photocatalytic performances, passing from UV to solar light, were drawn and a hypothesis on the photodegradation mechanism has been proposed, on the basis of the HPLC/MS results. Bare Bi2O3 samples, due to the exploitation of both their visible light absorption and the negligible intermediates formation, resulted to be higher performing under solar irradiation than either pure or Bi-doped ZnO nanopowders.
Articolo in rivista - Articolo scientifico
Bismuth doping; Bismuth oxide; o-Toluidine; Photodegradation; UV/solar irradiations; Zinc oxide;
English
2017
24
9
8287
8296
reserved
Pargoletti, E., Mostoni, S., Rassu, G., Pifferi, V., Meroni, D., Falciola, L., et al. (2017). Zn- vs Bi-based oxides for o-toluidine photocatalytic treatment under solar light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL, 24(9), 8287-8296 [10.1007/s11356-017-8430-x].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/211859
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