H2O2-assisted photocatalysis on flower-like rutile TiO2 nanostructures: Rapid dye degradation and inactivation of bacteria

L. Kõrösi, Mirko Prato, Alice Scarpellini, János Kovács, Dóra Dömötör, Tamás Kovács, Szilvia Papp

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Hierarchically assembled flower-like rutile TiO2 (FLH-R-TiO2) nanostructures were successfully synthesized from TiCl4 at room temperature without the use of surfactants or templates. An initial sol-gel synthesis at room temperature allowed long-term hydrolysis and condensation of the precursors. The resulting FLH-R-TiO2 possessed relatively high crystallinity (85 wt%) and consisted of rod-shaped subunits assembling into cauliflower-like nanostructures. Hydrothermal evolution of FLH-R-TiO2 at different temperatures (150, 200 and 250 °C) was followed by means of X-ray diffraction, transmission and scanning electron microscopy. These FLH-R-TiO2 nanostructures were tested as photocatalysts under simulated daylight (full-spectrum lighting) in the degradation of methyl orange and in the inactivation of a multiresistant bacterium, Klebsiella pneumoniae. The effects of hydrothermal treatment on the structure, photocatalytic behavior and antibacterial activity of FLH-R-TiO2 are discussed.

Original languageEnglish
Pages (from-to)171-179
Number of pages9
JournalApplied Surface Science
Volume365
DOIs
Publication statusPublished - Mar 1 2016

Fingerprint

Photocatalysis
Nanostructures
Bacteria
Coloring Agents
Dyes
Degradation
Photocatalysts
Surface-Active Agents
Temperature
Sol-gels
Condensation
Hydrolysis
Surface active agents
Lighting
Transmission electron microscopy
X ray diffraction
Scanning electron microscopy
titanium dioxide

Keywords

  • Antibacterial activity
  • Band gap energy
  • Hierarchical rutile TiO
  • Photocatalytic activity
  • Surface morphology
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

H2O2-assisted photocatalysis on flower-like rutile TiO2 nanostructures : Rapid dye degradation and inactivation of bacteria. / Kõrösi, L.; Prato, Mirko; Scarpellini, Alice; Kovács, János; Dömötör, Dóra; Kovács, Tamás; Papp, Szilvia.

In: Applied Surface Science, Vol. 365, 01.03.2016, p. 171-179.

Research output: Contribution to journalArticle

Kõrösi, L. ; Prato, Mirko ; Scarpellini, Alice ; Kovács, János ; Dömötör, Dóra ; Kovács, Tamás ; Papp, Szilvia. / H2O2-assisted photocatalysis on flower-like rutile TiO2 nanostructures : Rapid dye degradation and inactivation of bacteria. In: Applied Surface Science. 2016 ; Vol. 365. pp. 171-179.
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