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Structural and photoelectrochemical characterization of TiO2 nanowire/nanotube electrodes by electrochemical etching

  • Catalysis, Reaction Engineering
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Abstract

TiO2 nanowire/nanotube electrodes were synthesized by anodization of titanium foils in ethylene glycol solution containing 0.5 wt% NH4F and 1 wt% water at 60 V for 6 h. The microstructure and morphology of the asprepared electrodes were investigated by XRD and SEM. A possible formation mechanism and oxidation parameters of nanocomposite structure were discussed. The relationship between structural characteristics of TiO2 nanowire/nanotube electrodes and its photoelectrochemical characterization were evaluated by electrochemical analyzer and photocatalytic degradation of methylene blue (MB) solution. Furthermore, these TiO2 nanowire/nanotube electrodes promoted the photoelectrochemical characterization due to the larger surface areas, enhanced light harvesting and electron transport rate. The results show that photocurrent density of 1.44mA/cm2 and photocatalytic degradation of 95.51% was achieved for TiO2 nanowire/nanotube electrodes, which were 0.55mA/cm2 and 20.52% higher than the TiO2 nanotube electrodes under a similar condition, respectively.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Tianjin Institute of Urban Construction, Tianjin, 300384, China

    Jing Ya, Li An, Zhifeng Liu, E. Lei, Wei Zhao, Dan Zhao & Chengcheng Liu

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  1. Jing Ya
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  2. Li An
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  3. Zhifeng Liu
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  4. E. Lei
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  5. Wei Zhao
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  6. Dan Zhao
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  7. Chengcheng Liu
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Correspondence to Jing Ya.

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Ya, J., An, L., Liu, Z. et al. Structural and photoelectrochemical characterization of TiO2 nanowire/nanotube electrodes by electrochemical etching. Korean J. Chem. Eng. 29, 731–736 (2012). https://doi.org/10.1007/s11814-011-0241-z

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  • DOI: https://doi.org/10.1007/s11814-011-0241-z

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