In-situ XANES and PXRD to understand the kinetics of gold reduction inside MOFs

recycling methods have become essential as a circular economy displaces linear economic pathways. However, the current technology suffer from low gold kinetics and capacities and industry searches for new kinds of adsorbents. To embrace this new challenge, metal organics frameworks (MOFs) have the potential to become great adsorbents for extracting gold from e-waste leachate, due to their porous nature and high surface areas. In an attempt to design a MOF for gold recovery from aqueous solution, a post-synthetic modification strategy was proposed to allow the introduction of different amine adsorption sites. The host material was chosen to be MIL-101(Cr)-NH2 due to the relatively high chemical stability of the MOF, high surface area and large pore windows which allow the diffusion of the amines but also gold to the bulk.