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Novel heterojunction magnetic composite MIL-53 (Fe)/ZnFe2O4: Synthesis and photocatalytic pollutant degradation
Korean Journal of Chemical Engineering ( IF 2.7 ) Pub Date : 2022-06-03 , DOI: 10.1007/s11814-022-1140-1
Mahnaz Mohebali Nejadian , Niyaz Mohammad Mahmoodi , Cyrus Ghotbi , Farhad Khorasheh

A new magnetic composite was synthesized by integration of ZnFe2O4 and MIL-53(Fe) micro-rods by a solvothermal method. This composite served as a heterogeneous catalyst to overcome the high electron-hole recombination rates of ZnFe2O4 and to enhance the degradation of Direct Red 23 under visible light irradiation. Different analytical techniques, including XRD, FTIR, SEM, DRS, VSM, and PL, were employed to characterize the synthesized heterojunction nanocomposite and to evaluate its photocatalytic activity. The ZnFe2O4/MIL-53(Fe)/Vis-light system resulted in significantly higher dye degradation as compared with pristine ZnFe2O4 and MIL-53(Fe) semiconductors at the optimum pH of 3.1 and irradiation time of 120 minutes. Moreover, the composite exhibited high magnetization property that led to easy collection and recovery from effluent solution. It also retained its durability and stability after five cycles. The photo-generated hole was found to be the primary dye destruction agent as specified by the scavenger test.



中文翻译:

新型异质结磁性复合材料 MIL-53 (Fe)/ZnFe2O4:合成和光催化污染物降解

采用溶剂热法将ZnFe 2 O 4和MIL-53(Fe)微棒整合合成了一种新型磁性复合材料。该复合材料作为非均相催化剂克服了 ZnFe 2 O 4的高电子-空穴复合率并增强了 Direct Red 23 在可见光照射下的降解。采用不同的分析技术,包括 XRD、FTIR、SEM、DRS、VSM 和 PL,对合成的异质结纳米复合材料进行表征并评估其光催化活性。与原始 ZnFe 2 O 4相比, ZnFe 2 O 4 /MIL-53(Fe)/Vis-light 系统导致显着更高的染料降解和 MIL-53(Fe) 半导体,最适 pH 值为 3.1,辐照时间为 120 分钟。此外,该复合材料表现出高磁化特性,易于从流出溶液中收集和回收。五次循环后,它还保持了其耐用性和稳定性。发现光生空穴是清除剂测试指定的主要染料破坏剂。

更新日期:2022-06-06
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