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Preparation and photocatalytic activity of N-doped TiO2 nanotube array films

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Abstract

The N-doped TiO2 nanotube array films were fabricated directly by one-step electrochemical anodic oxidation of Ti foils in an HF electrolyte containing ammonium and nitrate ions. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDX), and ultraviolet–visible (UV–vis) absorption spectroscopy, respectively. The photocatalytic activities were evaluated by the degradation of methyl orange (MO) under visible light irradiation. The results showed that N dopant was successfully introduced into the TiO2 nanotube array films. The N-doped TiO2 nanotube array films showed a red shift and an enhancement of the absorption in the visible light region compared to the undoped sample. The photocatalytic activities of the N-doped TiO2 samples were much higher than those of the undoped sample. A maximum enhancement of photocatalytic activity was achieved for the N-doped TiO2 sample prepared in 0.07 M HF electrolyte containing 1.0 M NH4NO3, and 81% of MO was degraded in 150 min under visible light irradiation.

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Acknowledgments

The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (Grant No. 20976016) and the Science and Technology Project of Changsha, China (K1001020-11).

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Authors and Affiliations

  1. College of Chemical and Biological Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan, People’s Republic of China

    Mingming Dang, Yi Zhou, Hong Li & Caixia Lv

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  1. Mingming Dang
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  2. Yi Zhou
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  3. Hong Li
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Correspondence to Yi Zhou.

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Dang, M., Zhou, Y., Li, H. et al. Preparation and photocatalytic activity of N-doped TiO2 nanotube array films. J Mater Sci: Mater Electron 23, 320–324 (2012). https://doi.org/10.1007/s10854-011-0413-y

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