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

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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10 Scopus citations

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 and the e/h+ recombination processes of the ZnO particles.

Original languageEnglish (US)
Pages (from-to)233-240
Number of pages8
JournalApplied Catalysis B: Environmental
Volume178
DOIs
StatePublished - 2015

Keywords

  • Kinetic paths.
  • LC/MS
  • Photodegradation
  • ZnO nanoparticles
  • o-Toluidine

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