Photoelectrocatalytic determination of chemical oxygen demand under visible light using Cu₂O-loaded TiO₂ nanotube arrays electrode

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• 作者：Chao WangAuthor Vitae ; Jiancheng WuAuthor Vitae ; Peifang WangAuthor Vitae ; Yanhui Ao ; ^{andyao@hhu.edu.cn}Author Vitae ; Jun HouAuthor Vitae ; Jin QianAuthor Vitae
• 关键词：Chemical oxygen demand ; Determination ; Visible light ; TiO2 nanotube arrays ; Cu2O
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：181
• 期：Complete
• 页码：1-8
• 全文大小：870 K

文摘

A novel, visible light responsive chemical oxygen demand (COD) determination method using a Cu₂O-loaded TiO₂ nanotube arrays (TNTAs) electrode as sensor was proposed. In comparison with the pure TNTAs, the composite electrode showed much enhancement in the photocurrent response in visible region. With a positive bias potential of 0.3 V (vs. Ag/AgCl) and visible light illumination, a COD detection limit of 15 mg L^?1 COD and a linear range of 20-300 mg L^?1 COD were achieved by the present composite electrode. When the composite electrode was used for the test of real wastewater samples, the obtained values were in good agreement with those determined by the standard K₂Cr₂O₇ COD determination method. This paper would provide a potential outdoor COD determination method utilizing solar energy.