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

Research output: Contribution to journalArticle

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 3h 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
JournalApplied Catalysis B: Environmental
DOIs
Publication statusAccepted/In press - Jun 17 2014

Keywords

  • Kinetic paths
  • LC/MS
  • O-Toluidine
  • Photodegradation
  • ZnO nanoparticles

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

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    Pifferi, V., Cappelletti, G., Ardizzone, S., Falciola, L., Di Bari, C., Spadavecchia, F., Meroni, D., Carrà, A., Cerrato, G., Morandi, S., & Davoli, E. (Accepted/In press). Photo-mineralization of noxious o-toluidine water pollutant by nano-ZnO: The role of the oxide surface texture on the kinetic path. Applied Catalysis B: Environmental. https://doi.org/10.1016/j.apcatb.2014.08.043