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Photochemical synthesis and characterization of Ag/TiO2 nanotube composites

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Abstract

TiO2 nanotubes were fabricated by a hydrothermal method. Silver nanoparticles with diameters around 3–5 nm were loaded onto the surface of TiO2 nanotubes via a deposition approach followed by a photochemical reduction process under ultraviolet irradiation. Transmission electron microscopy (TEM), N2 adsorption measurements, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, UV-vis diffuse reflectance spectroscopy (UV-vis), and fluorescence spectroscopy (FL) were applied to characterize the as-prepared Ag/TiO2 nanotube composites. The photocatalytic activity of the as-prepared materials was investigated by photodegrading of methyl orange. The results showed that silver particles were in zero oxidation state and highly dispersed on the surface of TiO2 nanotubes when the concentration of Ag+ was low. The presence of metallic silver can help the electron-hole separation by attracting photoelectrons. The Ag/TiO2 nanotube composites with a suitable amount of silver showed a further improvement on the photocatalytic activity for degradation of methyl orange in water.

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Acknowledgements

The authors acknowledge the financial support from Science and Technology Bureau of Hunan Province (No.01JJY20575), Science and Technology Bureau of Guangdong Province (No.2006D90404033), and Science and Technology Bureau of GuangXi Province (No.0728107). We also would like to thank Waytech nanotechnology Ltd. for the assistance.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, People’s Republic of China

    Haibin Li, Xuechen Duan, Guocong Liu & Xiaoqi Liu

  2. Department of Chemistry, Yulin Normal University, Yulin, 537000, People’s Republic of China

    Guocong Liu

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  1. Haibin Li
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  2. Xuechen Duan
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  3. Guocong Liu
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  4. Xiaoqi Liu
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Correspondence to Haibin Li.

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Li, H., Duan, X., Liu, G. et al. Photochemical synthesis and characterization of Ag/TiO2 nanotube composites. J Mater Sci 43, 1669–1676 (2008). https://doi.org/10.1007/s10853-007-2387-y

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  • DOI: https://doi.org/10.1007/s10853-007-2387-y

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