Photocatalytic oxidation of organic pollutants on titania-clay composites

Judit Ménesi, László Körösi, Éva Bazsó, Volker Zöllmer, André Richardt, Imre Dékány

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

TiO2/Ca-montmorillonite composites were prepared by wet grinding in an agate mill. Positively charged TiO2 nanoparticles are bound to the surface of the negatively charged montmorillonite layers via heterocoagulation; the clay mineral is used as adsorbent and support for the photooxidation process. Aquatic solution of 0.5 mM phenol was degraded by irradiation with UV-VIS light (λ = 250-440 and 540-590 nm) in suspensions of TiO2-clay composites and significant photodegradation was observed at 40-60% TiO2/Ca-montmorillonite compositions. Synergistic effect was detected at solid/liquid interface for degradation of phenol and at solid/gas interface in the recycling flow reactors for photooxidation of ethanol and toluene vapors.

Original languageEnglish
Pages (from-to)538-542
Number of pages5
JournalChemosphere
Volume70
Issue number3
DOIs
Publication statusPublished - Jan 1 2008

Keywords

  • Ca-montmorillonite
  • Ethanol
  • Phenol
  • Photocatalysis
  • Titanium-dioxide
  • Toluene

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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