Topology engineering of COFs <i>via</i> localized 1D-2D unit interconnection to facilitate interfacial electron transfer for efficient gold recovery from e-waste leachates.

ABSTRACT: Developing cost-effective adsorbents for gold recovery from electronic waste (e-waste) is crucial. Here, we report a dimensional engineering strategy to fabricate covalent organic framework (COF) heterostructures with locally interconnected dimensions, enabling highly efficient host-guest recognition of Au(iii) in e-waste leachates. The heterostructures feature local interconnections between 2D and 1D units, introducing additional electron transport pathways. This structural innovation optimizes the electron transport kinetics essential for adsorptive redox reactions. Experimental results demonstrate that the locally interconnected dimensional architecture of TpaIda-2DCOF achieves a static saturation adsorption capacity of 3601 mg g^-1 for Au(iii) among the highest reported, whic

SUBMITTER: Xiong J 

PROVIDER: S-EPMC12616540 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature