Nanofluid-based wooden imprinted membranes with precise-designed nanocages for ultrafast and super-sensitive recognition and separation

By top-down method, the nanofluidic layers were polymerized in situ in the basswood pore of the in-situ growth of metal-organic frameworks (MOFs), and the nanofluidic layers were combined with molecular imprinting to prepare borate affinity sol-gel-imprinting composite membrane-based MOF/wood and nanofluidic layers for the adsorption and separation of shikimic acid (SA). For the first time, nanofluidic layers were polymerized in situ within the basswood pores of in-situ-grown MOFs, nanofluidic layers were combined with molecular imprinting to prepare boronate affinity sol-gel imprinting composite membrane-based MOF/wood and nanofluidic layers for the adsorption and separation of SA. Since MOFs previously grown in situ on basswood provided many accessible imprinting sites, coupled with the high permeability of the nanofluidic layer, the resulting imprinted membrane exhibited good adsorption capacity (72.5 mg g-1), selectivity coefficient (greater than 4.0) and ultrahigh water flux (more than 120000 L/m2 h), which solves the “trade-off” effect between membrane flux and selectivity. In addition, the synthesis process of the prepared boronate affinity sol-gel basswood-based molecular imprinting membranes (BSISMs) are not complicated and pollution-free. Finally, the above experimental results and the green synthesis process indicate that our synthesis method of BSISMs has great potential for application in selective separation, chemical industry, environment, biomedicine and other fields.