应用铁铜双金属有机骨架活化过硫酸盐催化剂去除水中有机污染物的研究

发布时间：2019-01-05 02:52

【摘要】：基于MIL-101(Fe)的合成方法,首次采用合成前金属掺杂法制备了双金属有机骨架MIL-101(Fe,Cu)催化剂,并利用X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FTIR)、扫描电镜(SEM)和X射线能谱仪(EDS)对催化剂进行表征.同时,以罗丹明B(Rh B)为目标降解物,研究此催化剂催化过硫酸盐降解Rh B的性能,并初步尝试将催化剂应用于邻苯二甲酸二丁酯(DBP)的催化降解.XRD、FTIR、SEM和EDS等分析结果表明,铜离子的掺杂导致MIL-101(Fe)的结构与形貌发生了改变,提高了对污染物的吸附和催化降解作用.相比MIL-101(Fe),在90 min时MIL-101(Fe,Cu)对Rh B的去除率达到95%,在180 min时对DBP的去除率达到68%.此外,分析了催化剂催化性能提高的原因:配位竞争导致铁离子的不饱和趋向;形貌的变化加强了对污染物的吸附作用.
[Abstract]:Based on the synthesis method of MIL-101 (Fe), bimetallic organic skeleton MIL-101 (Fe,Cu) catalyst was prepared by doping metal before synthesis for the first time. The (XRD), Fourier transform infrared spectrometer (FTIR),) was used as X-ray diffractometer. The catalyst was characterized by scanning electron microscope (SEM) and X-ray energy dispersive spectrometer (EDS). At the same time, the catalytic activity of Rhodamine B (Rh B) for Rh B degradation by persulfate was studied, and the catalytic degradation of dibutyl phthalate (DBP) was preliminarily tried. XRD,FTIR, The results of SEM and EDS analysis showed that the structure and morphology of MIL-101 (Fe) were changed due to the doping of copper ions, and the adsorption and catalytic degradation of the pollutants were improved. Compared with MIL-101 (Fe), the removal rate of Rh B by MIL-101 (Fe,Cu) reached 95% at 90 min, and the removal rate of DBP reached 68% at 180 min. In addition, the reasons for the improvement of the catalytic performance of the catalyst were analyzed, such as the unsaturated tendency of iron ions caused by coordination competition, and the adsorption of pollutants enhanced by the change of morphology.
【作者单位】：华南理工大学环境与能源学院;华南理工大学教育部工业聚集区域污染控制与修复重点实验室;华南理工大学制浆造纸国家重点实验室;
【基金】：国家自然科学基金(No.31570568) 中国制浆造纸工程国家重点实验室项目(No.201535) 广东省高层次人才基金项目(No.2013)~~
【分类号】：X703

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