将对苯二甲酸同氯化铈和氯化锆按照一定的比例放入反应釜内反应,制备得到双金属CeZr-MOF,将该双金属MOF和氧化石墨烯(GO)复合,采用硼氢化钠还原将Pd原子负载在CeZr-MOF/GO上,得到分散性能良好的Pd@CeZr-MOF/GO复合材料。并且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@CeZr-MOF/GO样品的形貌、结构、组成进行表征。以甲基橙和亚甲基蓝与硼氢化钠的反应为模型,采用紫外-可见分光光度计(UV-Vis)来检测该纳米复合材料的催化降解性能。结果表明:通过溶剂热法制备的Pd@CeZr-MOF/GO纳米颗粒具有良好的有机污染物降解性能,在5min内对亚甲基蓝的降解效率可以达到98.8％,且该催化剂性质稳定,易于回收,可以多次使用。
The bimetallic CeZr-MOF was prepared by reacting terephthalic acid with cerium chloride and zirconium chloride in a certain ratio in a reactor.The bimetallic MOF was compounded with graphene oxide,and the Pd atoms were loaded onto CeZr-MOF/GO by reduction with sodium borohydride to obtain the well-dispersed Pd@CeZr-MOF/GO composite.The morphology,structure and composition of the Pd@CeZr-MOF/GO samples were characterized by field emission scanning electron microscopy (SEM),field emission transmission electron microscopy (TEM) and X-ray diffractometer (XRD) tests.The reaction of methyl orange and methylene blue with sodium borohydride was used as a model to examine the catalytic degradation performance of the nanocomposites by ultraviolet-visible spectrophotometry (UV-Vis).It was shown that the Pd@CeZr-MOF/GO nanoparticles prepared by the solvothermal method had good degradation performance for organic pollutants,and the degradation efficiency for methylene blue could reach 98.8% within 5 min.Moreover,the catalyst was stable,easy to be recycled and could be reused multiple times.
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基金资助
国家自然科学基金(21761019)
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