The crystallinity and chemical composition of the MOF were analysed by a Bruker D8 Advance XRD (Germany). A Thermo Scientific K-Alpha (America) XPS was used for analysing the elemental composition and their chemical state. Thermal stability and the decomposition temperature of the MOF were measured with a Netzsch STA2500 Regulus (Germany). An FEI Talos F200X (America) field emission transmission electron microscope (TEM) was used to observe the micro-morphology of the Co/Zn MOF. To further study the surface topology of the MOF particles, a Bruker Dimension Icon (Germany), atomic force microscopy (AFM) was used.