Facile synthesis of visible-light-activated f-doped TiO2 hollow spheres by ultrasonic spray pyrolysis

Jianhui Huang, Wingkei Ho, Frank S.C. Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)

Abstract

A fluorine-doped TiO2 was synthesized using ultrasonic spray pyrolysis process with TiF4 acidic solution as precursor. The prepared catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), N2 adsorption-desorption measurement, UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of prepared samples were evaluated by the elimination of nitric oxide in the gas phase. The results indicate the hollow submicrospherical TiO2 with mesoporous structure using ultrasonic spray pyrolysis process. The prepared samples could efficiently eliminate the pollutant in the gas phase under visible light irradiation. The photocatalytic activity of prepared samples was influenced by the air flow rate of pump during the ultrasonic spray pyrolysis. The formation mechanism of hollow spherical structure in the ultrasonic spray pyrolysis process was also discussed.

Original languageEnglish
Pages (from-to)863-868
Number of pages6
JournalScience of Advanced Materials
Volume4
Issue number8
DOIs
Publication statusPublished - 1 Aug 2012

Keywords

  • Fluorine
  • Photocatalysis
  • Sphere
  • Titania
  • Ultrasonic Spray Pyrolysis

ASJC Scopus subject areas

  • Materials Science(all)

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