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Citation: LI Hai-Long, LUO Wu-Lin, CHEN Tao, TIAN Wen-Yu, SUN Mao, LI Chun, ZHU Di, LIU Ran-Ran, ZHAO Yu-Liang, LIU Chun-Li. Preparation and Photocatalytic Performance of Titania Nanotubes Loaded with Ag Nanoparticles[J]. Acta Physico-Chimica Sinica, ;2008, 24(08): 1383-1386. doi: 10.3866/PKU.WHXB20080810 shu

Preparation and Photocatalytic Performance of Titania Nanotubes Loaded with Ag Nanoparticles

1.
Beijing National Laboratory for Molecular Science, College of Chemistry &Molecular Engineering, Peking University, Beijing 100871, P. R. China; Laboratory for Bio-Environmental Health Sciences of NanoscaleMaterials and Nanosafety and Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 14 March 2008
Available Online: 17 June 2008

Titania nanotubes (TNTs) were synthesized by hydrothermal treatment of rutile-phase TiO2 nanoparticles in 10 mol·L-1NaOHsolution at 110 ℃ 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 益. 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 quantumdots, about 4 nmin 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 systemwere 46.8%, 57.2%, and 92.2%, respectively.
- Nanotubes; Titania; Ag; Hydrothermal method; Photocatalysis
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