Hydrothermal synthesis, structure and photocatalytic activity of PF-co-doped TiO2

László Korösi, Mirko Prato, Alice Scarpellini, Andreas Riedinger, János Kovács, Monika Kus, Vera Meynen, Szilvia Papp

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A series of PF-co-doped titanium dioxide (PF-TiO2) samples with various PF contents were synthesized hydrothermally at 250 °C and systematically investigated by means of X-ray diffraction, X-ray photoelectron spectroscopy and electron microscopy. For the PF-co-doping of TiO2, hexafluorophosphoric acid (HPF6) was used. Increasing HPF6 concentration did not decrease the crystallinity of the synthesized samples, but the dopant concentration strongly influenced the size and morphology of the PF-TiO2 nanoparticles. The undoped TiO2 consisted of polymorphic and polydisperse nanoparticles, whereas smaller, predominantly spherical particles were observed for the PF-TiO2 samples. Diffuse reflectance UV-vis spectroscopy revealed that PF-TiO2 exhibited a slightly higher band gap energy than that of undoped TiO2. Despite this blue-shift in absorption edge, the photocatalytic activity of PF-TiO2 was higher than that of undoped TiO2 even under visible light irradiation. The effects of the dopant concentration on the structure and photocatalytic activity are discussed in detail.

Original languageEnglish
Pages (from-to)442-450
Number of pages9
JournalMaterials Science in Semiconductor Processing
Volume30
DOIs
Publication statusPublished - 2015

Fingerprint

Hydrothermal synthesis
Doping (additives)
synthesis
Nanoparticles
nanoparticles
Ultraviolet spectroscopy
blue shift
titanium oxides
Titanium dioxide
Electron microscopy
crystallinity
electron microscopy
Energy gap
x rays
X ray photoelectron spectroscopy
photoelectron spectroscopy
Irradiation
microscopy
reflectance
X ray diffraction

Keywords

  • Crystal growth
  • Electron microscopy
  • Nanostructures
  • Photocatalysis
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Hydrothermal synthesis, structure and photocatalytic activity of PF-co-doped TiO2. / Korösi, László; Prato, Mirko; Scarpellini, Alice; Riedinger, Andreas; Kovács, János; Kus, Monika; Meynen, Vera; Papp, Szilvia.

In: Materials Science in Semiconductor Processing, Vol. 30, 2015, p. 442-450.

Research output: Contribution to journalArticle

Korösi, László ; Prato, Mirko ; Scarpellini, Alice ; Riedinger, Andreas ; Kovács, János ; Kus, Monika ; Meynen, Vera ; Papp, Szilvia. / Hydrothermal synthesis, structure and photocatalytic activity of PF-co-doped TiO2. In: Materials Science in Semiconductor Processing. 2015 ; Vol. 30. pp. 442-450.
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