Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (5): 955-964.doi: 10.3866/PKU.WHXB201503112

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Synthesis of Ta/Al-Fe2O3 Film Electrode and Its Photoelectrocatalytic Performance in Methylene Blue Degradation

JIN Huan1, WANG Juan1, JI Yun1, CHEN Mei-Mei2, ZHANG Yi1, WANG Qi1, CONG Yan-Qing1   

  1. 1 School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, P. R. China;
    2 Zhejiang Institute of Standardization, Hangzhou 310006, P. R. China
  • Received:2015-01-09 Revised:2015-03-10 Published:2015-05-08
  • Contact: WANG Qi, CONG Yan-Qing E-mail:yqcong@hotmail.com;wangqi8327@zjgsu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21477114), Zhejiang Provincial Foundation for Leaders of Disciplines in Science of China (PD2013170), Natural Science Foundation of Zhejiang Province, China (LY14E080002, LY14B070002, R5100266), and Graduate Innovation Foundation of Zhejiang Gongshang University, China (1260XJ1513152).

Abstract:

A novel visible-light-responsive photoanode (Ta/Al-Fe2O3) was fabricated by co-doping Ta and Al into iron oxide. The properties of the prepared electrodes were examined using X- ray photoelectron spectroscopy (XPS) and ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy. XPS analysis suggested that the surface chemical environments of Al and O were significantly affected by Ta doping. Photoelectrochemical (PEC), electrocatalytic (EC), and photocatalytic (PC) degradations of methylene blue (MB) were performed using Ta/Al-Fe2O3 and Al-Fe2O3 electrodes as the photoanodes. The results indicated that synergetic effects in PEC enhanced the MB degradation efficiency compared with the individual PC or EC processes. The estimated rate constant for MB degradation on Ta/Al-Fe2O3 was about twice that on Al-Fe2O3 under visible-light irradiation in the PEC process. The greatly improved visible-light activity and film stability indicated that Ta doping was an efficient way to improve the PEC activity of Ta/Al-Fe2O3 films.

Key words: Ta/Al-Fe2O3, Photoelectrocatalysis, Visible light, Methylene blue, Degradation

MSC2000: 

  • O643