Highly efficient microwave-assisted Fenton degradation bisphenol A using iron oxide modified double perovskite intercalated montmorillonite composite nanomaterial as catalyst.
Highly efficient microwave-assisted Fenton degradation bisphenol A using iron oxide modified double perovskite intercalated montmorillonite composite nanomaterial as catalyst.
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DOI：
10.1016/j.jcis.2021.03.046
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发表时间：
2021-03
影响因子：
9.9
通讯作者：
Yin Wang;Ruotong Wang;N. Lin;Yun-Fei Wang;Xiaodong Zhang
中科院分区：
文献类型：
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作者：
Yin Wang;Ruotong Wang;N. Lin;Yun-Fei Wang;Xiaodong Zhang
本工作采用浸渍法制备了不同质量分数氧化铁负载的钙钛矿插层蒙脱石（MMT）复合催化剂xFe2O3/LaCu0.5Co0.5O3-MMT0.2（x为Fe2O3的质量分数，x=0.02、0.04、0.06），并通过微波诱导催化降解双酚A评价其催化活性。 （双酚A）。 Fe2O3对微波有一定的吸收作用，可以增强复合材料的吸收性能，提高催化剂的催化活性。采用XRD、SEM、XPS和矢量网络分析对复合催化剂的结构、形貌、表面元素组成和微波吸收性能进行了分析。结果表明，样品结构均匀，比表面积较大，Oads/Olat比值较高，微波吸收性能优良。研究了微波功率、pH值和H2O2用量对催化降解性能的影响，其中0.04Fe2O3/LCCOM0.2对BPA的去除效果最明显。通过自由基捕获的表征和实验结果讨论了可能的反应机制。微波激发催化剂的表面活性位点产生氧化自由基，通过电子空穴传输降解BPA。采用响应面法（RSM）优化0.04Fe2O3/LCCOM0.2-BPA微波降解系统的操作参数。
In this work, perovskite intercalated montmorillonite (MMT) composite catalyst loaded by different mass fraction iron oxide, xFe2O3/LaCu0.5Co0.5O3-MMT0.2(x was the mass fraction of Fe2O3and x = 0.02, 0.04, 0.06), were prepared by impregnation method, and their catalytic activity were evaluated by microwave induced catalytic degradation of bisphenol A (BPA). Fe2O3had a certain absorption effect on microwave, which could enhance the absorption property of composite material, improve the catalytic activity of catalyst. XRD, SEM, XPS and vector network analysis were used to analysis the structure, morphology, surface element composition and microwave absorption performance of the composite catalyst. The results indicated that the sample had uniform structure, a larger specific surface, a higher ratio of Oads/Olatand excellent microwave absorption performance. The effects of microwave power, pH value and H2O2dosage on the catalytic degradation performance were studied, and 0.04Fe2O3/LCCOM0.2had the most obvious effect on the removal of BPA. The possible reaction mechanisms were discussed by characterization and experimental results of free radical capture. The surface active sites of the catalyst could be excited by microwave to generate oxidative free radicals, which could degrade BPA through electron hole transport. Response surface methodology (RSM) was used to optimize the operation parameters for the 0.04Fe2O3/LCCOM0.2-BPA microwave degradation system.