Reliable Strategy for the Covalent Bonding of MOFs to SiC Membranes for Ultrastable Noble Metal Capture in Harsh Environments

Silicon carbide (SiC) membranes combine exceptional chemical, thermal, and mechanical stability but suffer from surface inertness that precludes functionalization. Conversely, MOFs offer unmatched molecular selectivity but are typically powders, severely limiting their practical use. To address this, we develop a generalizable route to fabricate ultrastable MOF@SiC membranes via sequential oxidation and acidification, creating abundant Si–OH sites on SiC surfaces that covalently bond with Zr-MOF crystals; the bonding mechanism between MOFs and substrates has been extensively studied. Comparing modulators, acetic acid yields higher MOF crystallinity while hydrochloric acid produces uniform, defect-rich coatings…

• SA
  Science and Technology Commission of Shanghai Municipality

  Award: 20PJ1404600