Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (11): 3087-3094.doi: 10.3866/PKU.WHXB20101103

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Preparation and Characterization of One-Dimensional TiO2 Nanowire Films on a Flexible Stainless Steel Substrate

WU Tao, TAO Jie, DENG Jie, TANG Yu-Xin, ZHU Hong, GAO Peng   

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
  • Received:2010-04-15 Revised:2010-07-21 Published:2010-10-29
  • Contact: TAO Jie E-mail:taojie@nuaa.edu.cn
  • Supported by:

    The project was supported by the Natural Science Foundation of Jiangsu Province, China (BK2004129), Aeronautical Science Foundation of China (04H5209) and Nanjing University of Aeronautics and Astronautics Research Funding, China (NS2010153).

Abstract:

We synthesized a one dimensional (1D) TiO2 nanowire with a large aspect ratio on non-Ti substrate in NaOH aqueous solution by the hydrothermal treatment of pure titanium films deposited by direct current magnetron sputtering on a flexible stainless steel substrate (50 μm). The samples were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and photoelectro- chemical methods. Results show that the density and crystallinity of the titanium film as well as the binding strength between the Ti film and the stainless steel substrate increased with an increase in substrate temperature. The optimum hydrothermal temperature for the formation of the 1D TiO2 nanowire was 130-150 ℃when the concentration of NaOH was kept at 10 mol·L-1. TiO2 nanowires with diameters of 10-30 nm and lengths of up to several microns grow in a crosswise manner and form a 3D network structure. Moreover, linear sweep voltammetry and transient photocurrent response curves indicated that the 1D TiO2 nanowire film electrode had better photoelectrochemical performance than the TiO2 nanoparticle electrode. This technique provides a new method for the fabrication of 1D TiO2 nanowire films on different non-Ti heterogeneous substrates.

 

Key words: Direct currentmagnetron sputtering, Titaniumthin film, TiO2, Nanowire, Hydrothermalmethod

MSC2000: 

  • O643