Oxidation of bisphenol A by persulfate via Fe3O4-α-MnO2 nanoflower-like catalyst: Mechanism and efficiency
Oxidation of bisphenol A by persulfate via Fe3O4-α-MnO2 nanoflower-like catalyst: Mechanism and efficiency
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DOI：
10.1016/j.cej.2018.09.179
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发表时间：
2019-02-01
影响因子：
15.1
通讯作者：
Hong, Junming
中科院分区：
文献类型：
--
作者：
Dong, Zhengyu;Zhang, Qian;Hong, Junming
A novel and high-efficiency Fe3O4-alpha-MnO(2 )nanoflower-like catalyst was synthesized using a two-step hydrothermal method. The catalyst was used to activate persulfate (PS) to degrade bisphenol A (BPA) in aqueous phase. The mechanism of the Fe3O4-alpha-MnO2/PS system was investigated. X-ray photoelectron spectra and cyclic voltammograms showed that the mixed valence of Fe3O4-alpha-MnO2 was favorable to electron transfer between Fe and Mn elements. Apparently, this process promoted the circulation of Fe2+/Fe3+ and Mn3+/Mn4+, increasing the effectiveness of the catalyst to activate the PS. In addition, with ATR-FTIR analysis, the influence of phosphate confirmed the presence of -OH groups on the Fe3O4-alpha-MnO(2 )surface. Thus, these groups played crucial roles in the PS activation. Sulfate radicals were reacting species of great importance in BPA degradation. The degradation intermediates were also detected via GC-MS analysis, and the possible BPA degradation pathway was proposed.
