多级孔ZIF-8负载过渡金属纳米材料的简易制备及表征

Facile Preparation and Characterization of Hierarchical Porous ZIF-8 Supported Transition Metal Nanomaterials

采用浸渍-还原法制备了多级孔ZIF-8负载过渡金属纳米材料,并借助XRD,SEM、TEM和氮气吸附/脱附等测试手段对材料进行表征。结果表明,在浸渍-还原反应负载过渡金属后,ZIF-8晶体结构没有发生本质改变,且内部产生大量中孔,形成一种微孔和中孔共存的多级孔结构;Ni/HZIF-8样品的比表面积高达973.126 m^(2)·g^(-1),粒径小于1 nm的Ni金属颗粒能均匀地分散在ZIF-8表面。这种简易的浸渍-还原法是制备多级孔ZIF-8负载过渡金属纳米材料的有效方法,为多级孔MOFs负载金属材料的制备提供了一种新思路。

Hierarchical porous ZIF-8 supported transition metal nanomaterials(M/HZIF-8)were prepared by an impregnation-reduction method and characterized by XRD,SEM,TEM and nitrogen adsorption/desorption.After this loading process,the crystal structure of ZIF-8 does not change substantially,and a large number of mesopores appear in ZIF-8,forming a hierarchical porous structure with coexistence of micropores.As for Ni/HZIF-8,the specific surface area is observed to be as high as 973.126 m^(2)·g^(-1)and the Ni metal particles with sizes less than 1 nm are uniformly dispersed on the surface of ZIF-8 substrate.This facile impregnation-reduction method is an effective process for the preparation of transition metal loaded hierarchical porous ZIF-8 nanomaterials,which provides a new approach for the preparation of hierarchical porous MOFs supported metal materials.