Synergistic enhancement in photoelectrocatalytic degradation of bisphenol A by CeO₂ and reduced graphene oxide co-modified TiO₂ nanotube arrays in combination with Fenton oxidation

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• 作者：Qingxiang Zhou ; ^{zhouqx@cup.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; An Xing ; Jing Li ; Danchen Zhao ; Kuifu Zhao ; Man Lei
• 关键词：TiO2 nanotube arrays ; CeO2 ; reduced graphene oxide ; bisphenol A ; photoelectrocatalytic degradation ; Fenton oxidation
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 August 2016
• 年：2016
• 卷：209
• 期：Complete
• 页码：379-388
• 全文大小：2633 K

文摘

Present study described a high performance and rapid degradation technique for bisphenol A under simulated solar light irradiation by photoelectrocatalytic degradation with CeO₂ and reduced graphene oxide co-modified TiO₂ nanotube arrays (RGO-CeO₂-TNAs) in combination with Fenton reaction. In the photoelectrocatalytic system (PEC), CeO₂ and reduced graphene oxide co-modification significantly improved the degradation efficiency due to the synergistic effect of them. With the introduction of Fenton reaction, the expected further effective enhancement of degradation efficiency was achieved. Under the optimal condition, the degradation of BPA reached a high reaction rate constant of 0.0146 min⁻¹. In comparison, photoelectrocatalytic process exhibited higher degradation efficiency than that of photocatalytic-Fenton (PC-Fenton), electrocatalytic-Fenton (EC-Fenton) and Fenton processes. The stability and reusability of RGO-CeO₂-TNAs was investigated and the results demonstrated that rarely decline of degradation efficiency was achieved and the degradation efficiencies of the repeated degradation experiments were all over 80% for ten runs. All these indicated that there was markedly synergistic enhancement effect between Fenton reaction and PEC process using RGO-CeO₂-TNAs as the photoelectrode for degradation of bisphenol A. All these results indicated thatpresent method provided a potential powerful tool for the control and removal of bisphenol A and other pollutants in the future.