Preparation and photocatalytic performance of titania nanotubes loaded with Ag nanoparticles

Hai Long Li, Wu Lin Luo, Tao Chen, Wen Yu Tian, Mao Sun, Chun Li, Di Zhu, Ran Ran Liu, Yu Liang Zhao, Chun Li Liu

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Titania nanotubes (TNTs) were synthesized by hydrothermal treatment of rutile-phase TiO2 nanoparticles in 10 mol· L-1 NaOH solution at 110 °C for 24 h. The Ag loaded titania nanotubes (Ag/TNTs) were obtained by chemical deposition method with the TNTs suspending in the AgNO3 solution (pH=8) at 50 °C. The characterizations of the as-synthesized samples were performed by TEM, EDS, XRD, XPS, and UV-Vis spectra. The photocatalytic performance of the Ag/TNTs was investigated by UV-light induced photocatalytic decomposition of methyl orange(MO). The results showed that the inner/outer diameters of TNTs were about 6/10 nm and the length was several hundred nanometers. Both the shape and the crystalline of the nanotubes were not changed after the modification. The zero oxidation state Ag quantum dots, about 4 nm in diameter, were well dispersed on the external surface of the nanotubes. Ag/TNTs exhibited enhanced absorption at the visible range in the UV-Vis spectra. The Ag nanoparticles were found to significantly enhance the photocatalytic activity of TiO2 nanotubes, and the catalyst system was demonstrated to be highly efficient for the UV-light induced photocatalytic decomposition of MO compared to both rutile-phase TiO2 nanoparticles and pure TNTs. After irradiation for 60 min, the decomposition rates of MO solution in rutile-phase TiO2 nanoparticles, TNTs, and Ag/TNTs system were 46.8%, 57.2%, and 92.2%, respectively.

Original languageEnglish (US)
Pages (from-to)1383-1386
Number of pages4
JournalWuli Huaxue Xuebao/ Acta Physico - Chimica Sinica
Volume24
Issue number8
StatePublished - Dec 1 2008

Keywords

  • Ag
  • Hydrothermal method
  • Nanotubes
  • Photocatalysis
  • Titania

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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