Improving carbon coated TiO2 films with a TiCl4 treatment for photocatalytic water purification

Gylen Odling, Aruna Ivaturi, Efthalia Chatzisymeon, Neil Robertson

Research output: Contribution to journalArticle

12 Citations (Scopus)
18 Downloads (Pure)

Abstract

Using a simple thermal decomposition route, carbon-TiO2 hybrid films have been synthesized from a catechol-TiO2 surface complex. The coated films display enhanced visible region absorption, owing to the thin (~2 nm) layer of carbon encapsulating the TiO2. While photocatalytically active under visible light alone, it is demonstrated that the activity of the carbon coated films can be improved further by a hydrolytic treatment with TiCl4, leading to the introduction of small TiO2 particles (5-10nm) and doping of chlorine into the structure. The combination of the carbon layer and TiCl4 treatment gives increased photocatalytic performance for the photodegradation of dyes, phenolic pollutants and the reduction of toxic Cr(VI) to relatively benign Cr(III). In addition, the carbon coated films show improved bactericidal activity under UV irradiation, and hence have been successfully tested against the most common types of pollutant present in potential drinking waters.
Original languageEnglish
Pages (from-to)234-243
Number of pages10
JournalChemCatChem
Volume10
Issue number1
Early online date21 Sep 2017
DOIs
Publication statusPublished - 9 Jan 2018

Keywords

  • photocatalysis
  • water purification
  • Carbon coated TiO2 films
  • TiCl4 treatment

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