MWCNTs/ZIF-67复合材料的制备及其催化性能研究

Preparation and catalytic property of MWCNTs/ZIF-67 composite

通过简便、经济的方法合成了MWCNTs/ZIF-67复合材料,并运用SEM、TEM、XRD、XPS等技术手段对该复合材料进行了表征。为了评估MWCNTs/ZIF-67催化剂的催化活性,在NaBH_(4)存在下进行了对硝基苯酚(4-NP)的还原实验。结果表明,MWCNTs/ZIF-67催化剂具有很好的催化性能,在6min内对4-NP的催化效率高达99.82%,表观速率系数达到0.4973min^(-1)。此外,该材料可以通过磁铁从水溶液中收集,便于回收和再利用。且经过5次循环后,复合材料的催化活性仍很高,表明该复合材料有较好的稳定性,可以作为去除环境污染物的新型催化材料。

In this paper,MWCNTs/ZIF-67 composite material was synthesized by a simple and economical method,and characterized by SEM,TEM、XRD,XPS and other technical means.In order to evaluate the catalytic activity of the MWCNTs/ZIF-67 catalyst,the reduction experiment of p-nitrophenol(4-NP)was carried out in the presence of NaBH_(4).The results showed that the MWCNTs/ZIF-67 catalyst had good catalytic performance with a catalytic efficiency of 99.82%for 4-NP within 6min and an apparent rate coefficient of 0.4973min^(-1).In addition,the material could be collected from aqueous solution by magnets,which was convenient for recycling and reuse.Moreover,after 5 cycles,the catalytic activity of the composite material was still very high,indicating that the composite material had good stability and could be used as a new type of catalytic material for the removal of environmental pollutants.