Citation: JIN Huan, WANG Juan, JI Yun, CHEN Mei-Mei, ZHANG Yi, WANG Qi, CONG Yan-Qing. Synthesis of Ta/Al-Fe₂O₃ Film Electrode and Its Photoelectrocatalytic Performance in Methylene Blue Degradation[J]. Acta Physico-Chimica Sinica, ;2015, 31(5): 955-964. doi: 10.3866/PKU.WHXB201503112 shu

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

JIN Huan ¹ ,
WANG Juan ¹ ,
JI Yun ¹ ,
CHEN Mei-Mei ² ,
ZHANG Yi ¹ ,
WANG Qi ^1, ,
CONG Yan-Qing ^1,

1.
1 School of Environmental Science and Engineering, Zhejiang ngshang University, Hangzhou 310018, P. R. China;
2 Zhejiang Institute of Standardization, Hangzhou 310006, P. R. China

Received Date: 9 January 2015
Available Online: 11 March 2015
Fund Project: 国家自然科学基金(21477114) (21477114) 浙江省中青年学科带头人基金(PD2013170) (PD2013170) 浙江省自然科学基金(LY14E080002, LY14B070002, R5100266) (LY14E080002, LY14B070002, R5100266)浙江工商大学研究生科技创新项目(1260XJ1513152)资助 (1260XJ1513152)

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.
- Ta/Al-Fe₂O₃,
- Photoelectrocatalysis,
- Visible light,
- Methylene blue,
- Degradation
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Synthesis of Ta/Al-Fe₂O₃ Film Electrode and Its Photoelectrocatalytic Performance in Methylene Blue Degradation