Ta/Al-Fe2O3薄膜电极的制备及其光电催化降解亚甲基蓝性能

doi:10.3866/PKU.WHXB201503112

物理化学学报 >> 2015, Vol. 31 >> Issue (5): 955-964.doi: 10.3866/PKU.WHXB201503112

Ta/Al-Fe₂O₃薄膜电极的制备及其光电催化降解亚甲基蓝性能

金环¹, 王娟¹, 姬云¹, 陈媚媚², 张轶¹, 王齐¹, 丛燕青¹

1 浙江工商大学环境科学与工程学院, 杭州310018;
2 浙江省标准化研究院, 杭州310006

收稿日期:2015-01-09 修回日期:2015-03-10 发布日期:2015-05-08
通讯作者: 王齐, 丛燕青 E-mail:yqcong@hotmail.com;wangqi8327@zjgsu.edu.cn
基金资助:
国家自然科学基金(21477114), 浙江省中青年学科带头人基金(PD2013170), 浙江省自然科学基金(LY14E080002, LY14B070002, R5100266)和浙江工商大学研究生科技创新项目(1260XJ1513152)资助

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 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).

摘要/Abstract

摘要：

采用简单的涂滴法制备出新型的Al、Ta 共掺杂的三元铁氧化物(Ta/Al-Fe₂O₃)可见光响应型光催化薄膜. 运用X射线光电子能谱(XPS)和紫外-可见(UV-Vis)光谱等手段对其进行了表征, 考察了其光电化学性能, 并研究了复合电极光电催化降解亚甲基蓝(MB)废水的反应性能. 由表面谱学分析可知, Ta 和Al 成功掺入Fe₂O₃中, Ta 会改变催化剂表面Al 和O的化学环境. 在可见光照射下的光电催化(PEC)反应中, Ta/Al-Fe₂O₃降解MB的反应速率约为Al-Fe₂O₃的2 倍, 光电催化共作用的效果优于单纯光催化作用(PC)和电催化(EC)作用的效果.结果表明, Ta掺杂有利于提高Ta/Al-Fe₂O₃薄膜的光电催化活性.

关键词: Ta/Al-Fe₂O₃, 光电催化, 可见光, 亚甲基蓝, 降解

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

金环, 王娟, 姬云, 陈媚媚, 张轶, 王齐, 丛燕青. Ta/Al-Fe₂O₃薄膜电极的制备及其光电催化降解亚甲基蓝性能[J]. 物理化学学报, 2015, 31(5): 955-964.

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 Phys. -Chim. Sin., 2015, 31(5): 955-964.

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Ta/Al-Fe₂O₃薄膜电极的制备及其光电催化降解亚甲基蓝性能

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

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