Fe@Fe2O3 core-shell nanowires compounding humic acid enhanced catalysis removal 2,4,6-trichlorophenol: Performance and mechanism
Fe@Fe2O3 core-shell nanowires compounding humic acid enhanced catalysis removal 2,4,6-trichlorophenol: Performance and mechanism
复制标题
Fe@Fe2O3核壳纳米线复合腐植酸增强催化去除2,4,6-三氯苯酚：性能与机理
DOI：
10.1016/j.cej.2021.131779
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发表时间：
2021-08
影响因子：
15.1
通讯作者：
Hui Li
中科院分区：
文献类型：
--
作者：
Jin Zhang;Chen Wang;Minghui Xiang;Yuan Huang;Lide Jin;Zhiyuan Yang;Hui Li
In this study, compounding Fe@Fe2O3with humic acid (HA) enhanced peroxymonosulfate (PMS) activation to degrade 2,4,6-trichlorophenol (TCP). The characterization and catalytic performance of the materials revealed that Fe@Fe2O3-HA had more functional groups, more surface oxygen vacancies, higher stability, and higher cyclicality. HA promoted the continuous release of iron ions as well as the process of PMS activation by accelerating Fe3+reduction. The results of electron paramagnetic resonance (EPR) and quenching experiments indicated that more reactive oxygen species (ROS) were generated in the Fe@Fe2O3-HA/Fe2+/PMS system, and SO4radical dot−was the dominant ROS for TCP degradation. The degradation efficiency of TCP in the Fe@Fe2O3/Fe2+/PMS system was increased from 59% to 83% within 10 min after HA was compounded. The degradation efficiency of TCP in the Fe@Fe2O3-HA/Fe2+/PMS system was greatest at 60 min under alkaline conditions. Thus, our results demonstrated that Fe@Fe2O3-HA, a highly active catalyst exhibited excellent reactivity in the potential application of Fe2+/PMS for groundwater protection.
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