Sulfate radical-induced degradation of Acid Orange 7 by a new magnetic composite catalyzed peroxymonosulfate oxidation process
Sulfate radical-induced degradation of Acid Orange 7 by a new magnetic composite catalyzed peroxymonosulfate oxidation process
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新型磁性复合材料催化过一硫酸盐氧化过程硫酸根诱导降解酸性橙7
DOI：
10.1016/j.jhazmat.2014.06.004
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发表时间：
2014-08-30
影响因子：
13.6
通讯作者：
Qian, Guangren
中科院分区：
文献类型：
--
作者：
Chen, Dan;Ma, Xiaolong;Qian, Guangren
我们合成了一种新型磁性复合材料Fe3O4/Cu(Ni)CrLDH，作为一种多相催化剂，利用基于硫酸根的高级氧化工艺降解溶液中的有机染料。采用X射线衍射仪、电感耦合等离子体、透射电子显微镜、振动样品磁强计等测试手段对两步微波水热法合成的复合材料进行了表征。在25℃、酸性橙7(AO7)初始浓度为25 mg/L、AO7/过一硫酸盐(PMS)摩尔比为1：10的条件下进行降解实验，结果表明，Fe3O4/Cu1.5Ni0.5CrLDH可完全降解，矿化率可达46%。Fe_3O_4/Cu(Ni)Cr-LDH的Cu(II)和Fe(II/III)活化PMS生成硫酸根(SO4中心点-)。随后，AO7分子的有机官能团被硫酸根(SO4中心点-)破坏，导致AO7的降解。此外，催化剂的催化性能可重复使用5次。因此，Fe3O4/Cu(Ni)CrLDH复合材料在有机染料废水处理中具有广阔的应用前景。(C)爱思唯尔出版的2014年。
We synthesized a novel magnetic composite, Fe3O4/Cu(Ni)Cr-LDH, as a heterogeneous catalyst for the degradation of organic dyes in the solution using sulfate radical-based advanced oxidation processes. The physicochemical properties of the composite synthesized via two-step microwave hydrothermal method were characterized by several techniques, such as X-ray diffraction (XRD), inductively coupled plasma (ICP), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The degradation tests were performed at 25 degrees C with Acid Orange 7 (AO7) initial concentration of 25 mg/L and AO7/peroxymonosulfate (PMS) molar ratio of 1:10, which showed that the complete degradation by Fe3O4/Cu1.5Ni0.5Cr-LDH could be achieved and the mineralization rate could reach 46%. PMS was activated by Cu (II) and Fe (II/III) of Fe3O4/Cu(Ni)Cr-LDH to generate sulfate radicals (SO4 center dot-). Subsequently, the organic functional groups of AO7 molecules were destroyed by sulfate radicals (SO4 center dot-), inducing the degradation of AO7. Moreover, the catalytic behavior of the catalysts could be reused five times. Therefore, our work suggested that the Fe3O4/Cu(Ni)Cr-LDH composite could be applied widely for the treatment of organic dyes in wastewater. (C) 2014 Published by Elsevier B.V.