金属有机框架材料(MOFs)具有较高的比表面积、较高的孔隙率、结构可调和可功能化的特点。近年来,金属有机骨架(MOF)复合材料作为新型功能材料发展迅速,基于MOFs的复合材料在催化降解水中有机污染物的应用成为了一个重要的研究方向。将对苯二甲酸和2-甲基咪唑加入到N,N-二甲基甲酰胺和甲醇的混合溶液中,再将Zn(NO3)2·6H2O加入到上述混合溶液中,在150℃下反应合成双配体Zn-MOF,采用硼氢化钠还原将Pd负载在双配体Zn-MOF上,得到均匀分散的Pd@Zn-MOF。采用场发射扫描电子显微镜(SEM)、场发射透射电子显微镜(TEM)、X射线衍射仪(XRD)等测试手段,对Pd@Zn-MOF材料样品的形貌、结构、组成进行了表征。以亚甲基蓝与硼氢化钠的还原反应为模型,采用紫外-可见分光光度计(UV-Vis)来观察Pd@Zn-MOF的催化降解性能。
MOFs has the characteristics of higher specific surface area,higher porosity,adjustable structure and functionability.In recent years,metal organic framework (MOF) composites have developed rapidly as new functional materials,and the application of MOFs-based composites in catalytic degradation of organic pollutants in water has become an important research direction.Terephthalic acid and 2-methyl-imidazole were added to the mixed solution of N,N-dimethyl-formamide and methanol,and then Zn(NO3)2·6H2O was added to the above mixed solution,and the double ligand Zn-MOF was synthesized at 150 degrees,and Pd was supported on double ligand Zn-MOF by sodium borohydride reduction to obtain uniformly dispersed Pd@Zn-MOF.By means of field emission scanning electron microscope (SEM),field emission transmission electron microscope (TEM),X-ray diffractometer (XRD) and other testing methods,the morphology,structure and composition of Pd@ Zn-MOF material samples were characterized.The catalytic degradation performance of Pd@Zn-MOF was observed by UV-visible spectrophotometer (UV-Vis) with the reduction reaction of methylene blue and sodium borohydride as a model.
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基金资助
国家自然科学基金(21761019)
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