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PHOTOCATALYTIC ACTIVITY AND PHOTOCURRENT PROPERTIES OFTiO2NANOTUBE ARRAYS INFLUENCED BY CALCINATION TEMPERATURE AND TUBE LENGTH

Author

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  • JIAN HOU

    (Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, P. R. China)

  • MIN ZHANG

    (Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, P. R. China)

  • GUOTIAN YAN

    (Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, P. R. China)

  • JIANJUN YANG

    (Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, P. R. China)

Abstract

In this article, titanium oxide nanotube arrays(TiO2–NTAs)were fabricated by anodic oxidation in an ethylene glycol (EG) electrolyte solution containing 0.25 wt.% NH4F. By varying anodized time and annealed temperature, the obtained nanotube arrays behaved different photocatalytic (PC) activities and photocurrent properties. These samples were characterized by scanning electronic microscope (SEM), X-ray powder diffraction (XRD). It was indicated in SEM images thatTiO2nanotube manifests highly ordered structure which, however, has been completely destroyed when the temperature comes to 800°C. XRD manifested thatTiO2nanotubes with various kinds of length all possessed anatase crystallite when annealed at 500°C; meanwhile, with certain length,TiO2–NTAsannealed at series calcination temperature range of 300–600°C also presented anatase crystallite, which is gradually enhanced with the increment of temperature. At 700°C, mixed structure was observed which was made up of proportions of overwhelming anatase and toothful rutile. Methyl blue (MB) degradation and photocurrent measurement testified thatTiO2–NTAsunder 4 h oxidation and 3 h of 600°C calcination manifested the highest activity and photocurrent density.

Suggested Citation

  • Jian Hou & Min Zhang & Guotian Yan & Jianjun Yang, 2012. "PHOTOCATALYTIC ACTIVITY AND PHOTOCURRENT PROPERTIES OFTiO2NANOTUBE ARRAYS INFLUENCED BY CALCINATION TEMPERATURE AND TUBE LENGTH," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 19(03), pages 1-8.
    • Handle: RePEc:wsi:srlxxx:v:19:y:2012:i:03:n:s0218625x12500230
    DOI: 10.1142/S0218625X12500230
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