Zirconium-doped and silicon-doped TiO<inf>2</inf> photocatalysts synthesis from ionic-liquid-like precursors

Marc Estruga, Concepción Domingo, Xavier Domènech, José A. Ayllón

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20 Citations (Scopus)

Abstract

Nanocrystalline titania powders doped with either zirconium or silicon were synthesized at low temperature via destabilization of ionic-liquid-like precursors. Titania materials prepared at low temperature (85 °C) consisted of anatase nanocrystals of about 25 nm, according to powder X-ray diffraction and transmission electron microscopy. Dopant incorporation was evaluated using inductively coupled plasma-optical emission spectrometry, and it was found that dopant/titanium ratios in the powder (0.011 for Zr and 0.026 for Si) were lower than those in the precursor (0.11 for both). Low-temperature nitrogen adsorption-desorption isotherms displayed the characteristic hysteresis loop of mesoporous materials. Specific surface areas reached values of 130 and 155 m2 g-1 for Zr-doped and Si-doped TiO2, respectively. The photocatalytic activity of the synthesized nanopowders was tested using methyl orange and 4-chlorophenol as target pollutants. © 2010 Elsevier Inc. All rights reserved.
Original languageEnglish
Pages (from-to)327-333
JournalJournal of Colloid and Interface Science
Volume344
Issue number2
DOIs
Publication statusPublished - 15 Apr 2010

Keywords

  • Ionic liquids
  • Low temperature
  • Mineralization
  • Photocatalysis
  • Si-doped TiO 2
  • Zr-doped TiO 2

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