Efficient removal of organic pollutant by activation of persulfate with magnetic Co3O4/CoFe2O4 composite
Efficient removal of organic pollutant by activation of persulfate with magnetic Co3O4/CoFe2O4 composite
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DOI：
10.1016/j.arabjc.2020.03.012
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发表时间：
2020-05
影响因子：
6
通讯作者：
Huixuan Zhang;Lichao Nengzi;Yu Liu;Yingjie Gao;Xiuwen Cheng
中科院分区：
文献类型：
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作者：
Huixuan Zhang;Lichao Nengzi;Yu Liu;Yingjie Gao;Xiuwen Cheng
在本研究中，通过机械混合两种粉末状原始样品合成了磁性尖晶石 Co3O4/CoFe2O4 复合材料。然后通过TEM、SEM、XRD、BET、XPS和VSM测量对催化剂进行表征。接下来，应用 Co3O4/CoFe2O4 复合材料通过活化过硫酸盐来降解水中的罗丹明 B (RhB)。结果表明，Co3O4/CoFe2O4复合材料对RhB的去除效率很高，45分钟内可降解95.59%的RhB。此外，还研究了初始pH、PS用量、Co3O4/CoFe2O4复合材料用量、RhB初始浓度和温度等参数的影响。此外，还观察并解释了共存阴离子对 RhB 降解的影响。此外，我们进行了猝灭实验，发现硫酸根和羟基自由基是降解过程中的主要活性自由基。最后，循环实验证明Co3O4/CoFe2O4对RhB降解具有良好的稳定性。简而言之，Co3O4/CoFe2O4复合材料是一种很有前景的废水处理催化剂。
In this study, magnetic spinel Co3O4/CoFe2O4composite were synthesized by the mechanical mixing of both powdered pristine samples. Then the catalyst was characterized by TEM, SEM, XRD, BET, XPS and VSM measurement. Next, Co3O4/CoFe2O4composite was applied to degrade rhodamine B (RhB) in water by activating persulfate. Results showed that Co3O4/CoFe2O4composite exhibited high efficiency for removal of RhB, and 95.59% of it could be degraded in 45 min. Besides, the effects of parameters, such as initial pH, PS dosage, Co3O4/CoFe2O4composite dosage, initial concentration of RhB and temperture were studied. Also, the effects of coexisting anions on RhB degradation were observed and explained. Furthermore, we conducted the quenching experiment and found that sulfate radical and hydroxyl radicals were the main active radicals in the degradation process. Finally, recycle experiments proved that Co3O4/CoFe2O4had a good stability for RhB degradation. In short, Co3O4/CoFe2O4composite is a promising catalyst for wastewater treatment.