Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (09): 2343-2348.doi: 10.3866/PKU.WHXB20100904

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Photoelectrochemical Properties of Cubic Tungsten Trioxide Films Obtained by the Polymeric Precursor Method

LI Wen-Zhang1, LI Jie1, WANG Xuan1,2, ZHANG Shu-Juan1, CHEN Qi-Yuan1   

  1. 1. Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China;
    2. Shenyang Aluminum and Magnesium Engineering and Research Institute, Shenyang 110001, P. R. China
  • Received:2010-03-09 Revised:2010-04-28 Published:2010-09-02
  • Contact: LI Jie
  • Supported by:

    The project was supported by the NewCentury Excellent Talents in University, China (NCET.05.0691) and Key Research Project in Science and Technology Programof Hunan Province, China (2008SK1001).


WO3 films were prepared using ammonium metatungstate as the precursor and polyethylene glycol 1000 as the structure-directing agent by the polymeric precursor method. The obtained materials were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet-visible (UV-Vis) spectrophotometry. The photoelectrochemical properties of the WO3 film electrodes were studied by cyclic voltammetry, Mott-Schottky, transient photocurrent spectra, and photocurrent-potential curve analysis. Results indicate that the films are crystalline with a cubic structure and they have bandgap energy of 2.7 eV. The flat band potential, donor carrier density, and photocurrent density of the sample calcined at 450 ℃ are 0.06 V, 2.44×1022 cm-3 and 2.70 mA·cm-2 under a 500W Xe lamp (I0=100 mW·cm-2), respectively. The effect of calcination temperature on the photoelectrochemical properties of the WO3 films was investigated and the mechanismof charge separation for its behavior was also discussed.

Key words: Cubic WO3, Nano-structured film, Photoelectrochemistry, Polymeric precursor