顾傲天，谭伟洋，李智颖，付 豪，王 鹏，龚春慧，杨 毅
（南京理工大学 环境与生物工程学院；江苏省化工污染控制与资源化重点实验室，江苏 南京 210094）
DOI:10.13732/j.issn.1008-5548.2022.01.002
收稿日期： 2021-05-25，修回日期：2021-06-23，在线出版时间：2021-11-16。
基金项目：国家自然科学基金项目，编号：51908240；中央高校基本科研业务费专项资金项目，编号：30921013110；江苏省研究生科研与实践创新计划项目，编号：KYCX20_0332，SJCX20_0114；江苏省凹土资源利用重点实验室开放课题项目：编号 HPK202001。
第一作者简介：顾傲天(1995—)，男，博士研究生，研究方向为环境功能材料。E-mail：490188489@qq.com。
通信作者简介：杨毅(1973—)，男，研究员，博士，博士生导师，研究方向为环境功能材料。E-mail：yangyi@njust.edu.cn。
摘要：采用双溶剂法制备Ag-ZIF-8(Zn-Co)多金属MOFs材料，并将其用于对硝基苯酚、邻硝基苯酚和对硝基苯胺等污染物的催化还原；利用扫描电子显微镜(SEM)、 X射线衍射仪(XRD)、透射电镜(TEM)对制备的材料进行表征。结果表明：Ag-ZIF-8(Zn-Co)在催化降解3种污染物方面表现出优异的催化活性；Ag-ZIF-8(Zn-Co)催化降解对硝基苯酚反应的表观速率常数和转换频率分别为1.080×10-4 s-1和2.056 min-1,并在多次重复使用过程中保持较高的催化性能；与单金属复合材料Ag-ZIF-8和Ag-ZIF-67相比，Ag-ZIF-8 (Zn-Co)的催化活性显着提高，主要原因是Ag-ZIF-8(Zn-Co)具有高比表面积，Zn和Co双金属的协同作用，以及孔道对银纳米颗粒的限制等。
关键词：双溶剂法；沸石咪唑酯骨架；硝基苯酚；金属有机骨架；高效催化
Abstract：Ag-ZIF-8(Zn-CO) multi metal MOFs was prepared by double-solvent method and applied to the catalytic reduction pollutants of p-nitrophenol, o-nitrophenol and p-nitroaniline. The obtained samples were fully characterized by scanning electron microscope(SEM), X-ray diffractometer(XRD) and transmission electron microscope(TEM). The results show that Ag-ZIF-8(Zn-Co) shows excellent catalytic activity in the catalytic degradation of three pollutants. The apparent rate constant and conversion frequency of Ag-ZIF-8(Zn-Co) catalytic degradation of p-nitrophenol are 1.080×10-3 s-1 and 2.056 min-1, respectively, and high catalytic performance is maintained during repeated use. Compared with Ag-ZIF-8 and Ag-ZIF-67, the catalytic activity of Ag-ZIF-8(Zn-Co) is significantly improved, which is mainly due to the high specific surface area of Ag-ZIF-8(Zn-Co), Zn and Co bimetallic synergy, and encapsulation of silver nanoparticles by pores.
Keywords：double-solvent method; zeolitic imidazolate framework; nitrophenol; metal organic framework; efficient catalysis
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