Thermal stability and decomposition temperatures of the bimetallic MOF were determined by thermogravimetric (TGA) analysis, Figure . The DTG curves show three stages of weight loss for the sample; the first one ranges from 30 to 150 °C corresponding to the desorption of water molecules with an approximate weight loss of ~14.4 wt.%. However, the main decomposition took place at 333.8 °C, which indicates the collapse of the framework with an approximate weight loss of ~66.22 wt.%. These demonstrate that the Co/Zn bimetallic MOF was thermally stable at temperatures as high as 330 °C allowing a wide range of operating temperatures. Transmission electron microscopy (TEM) was used to study the morphology of the MOF particles. TEM images in Figure