Magnetically separable TiO2/FeOx/POM accelerating the photocatalytic removal of the emerging endocrine disruptor: 2,4-dichlorophenol
Magnetically separable TiO2/FeOx/POM accelerating the photocatalytic removal of the emerging endocrine disruptor: 2,4-dichlorophenol
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DOI：
10.1016/j.apcatb.2019.04.088
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
Jiajie Yu;Tianhe Wang;S. Rtimi
中科院分区：
文献类型：
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作者：
Jiajie Yu;Tianhe Wang;S. Rtimi
本研究提出了磁性可分离的TiO 2/FeOx微结构装饰与聚氧钨酸盐（POM）导致内分泌干扰物2，4-二氯苯酚（2，4-DCP）在低强度的太阳光下。TiO 2/FeOx（25%）/POM（1%）复合材料在酸性介质中降解2，4-DCP的动力学最快。磁化光催化剂的使用避免了在2，4-DCP降解后通过常规处理从溶液中分离催化剂的高成本。通过使用合适的清除剂，确定了导致2，4-DCP降解的活性氧（ROS）。2，4-DCP的降解随着施加的光强度（注量率）的增加而增加，为复合材料的半导体行为提供了证据。通过X射线光电子能谱（XPS）确定了导致2，4-DCP降解的FeOx/Fe 2 O3间隙内状态。基于组成光催化复合材料的氧化物的电子能量位置，提出了氧化物之间界面电荷转移（IFCT）的方案。
This study presents the magnetically separable TiO2/FeOx microstructure decorated with poly-oxo-tungstate (POM) leading to the endocrine disruptor 2,4-dichlorophenol (2,4-DCP) under low intensity solar light. The fastest 2,4-DCP degradation kinetics was obtained by way of the TiO2/FeOx(25%)/POM(1%) composite in acidic media. The use of magnetized photocatalysts avoids the high cost separation of the catalysts from the solution by conventional treatments after 2,4-DCP-degradation. Reactive oxygen species (ROS) leading to the 2,4-DCP degradation were identified by use of appropriate scavengers. The 2,4-DCP degradation increased with the applied light intensity (fluence rate) providing evidence for the semiconductor behavior of the composite material. FeOx/Fe2O3intra-gap states were identified by X-ray photoelectron spectroscopy (XPS) leading to 2,4-DCP degradation. A scheme for the interfacial charge transfer (IFCT) between the oxides is suggested based on the electronic energy position of the oxides making up the photocatalytic composite.