Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (03): 635-640.doi: 10.3866/PKU.WHXB201112231

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Preparation and Visible Light Photocatalytic Activity of Fe-N Codoped TiO2 Nanotube Arrays

WU Qi, SU Yu-Feng, SUN Lan, WANG Meng-Ye, WANG Ying-Ying, LIN Chang-Jian   

  1. Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2011-11-14 Revised:2011-12-15 Published:2012-02-23
  • Contact: SUN Lan E-mail:sunlan@xmu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51072170, 21021002), Natural Science Foundation of Fujian Province, China (2011J01057), and National Foundation for Fostering Talents of Basic Science, China (J1030415).

Abstract: Fe-N codoped TiO2 nanotube arrays were fabricated by anodization of Ti, followed by wet immersion and annealing post-treatment. The doped TiO2 nanotube array photocatalysts were characterized by field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Auger electron spectroscopy (AES). The results indicated that Fe and N dopants had almost no effect on the morphology and structure of TiO2 nanotube arrays, and that Fe and N were doped into the TiO2 lattice. UV-Vis diffuse reflectance spectra showed that the absorption band edge of Fe-N codoped TiO2 nanotube arrays exhibited a red shift compared with that of pure TiO2 nanotube arrays and Fe- or N-doped TiO2 nanotube arrays. The photocatalytic activity of Fe-N codoped TiO2 nanotube arrays was evaluated by their ability to degrade rhodamine B under visible light irradiation. The degradation rate of rhodamine B over Fe-N codoped TiO2 nanotube arrays was obviously higher than that over pure TiO2 nanotube arrays and Fe- or N-doped TiO2 nanotube arrays, which is attributed to the synergistic effect of the Fe and N codopants.

Key words: Fe and N, Codoping, TiO2 nanotube array, Rhodamine B, Visible light

MSC2000: 

  • O644