Wood-based multi-layered porous imprinted membranes with dual-metal composite nanostructures: Synergistic promotion of rebinding capacity, selectivity and permeability

Herein the Ag & TiO2-based propranolol-imprinted layers had been prepared onto basswood membrane surface based on a polydopamine (PDA)-induced self-polymerization/composite strategy. The as-prepared PDA-induced Ag & TiO2-based molecularly imprinted nanocomposite membranes (PAT-MIMs) showed superb specific recognition capability and permselectivity toward the template molecule of propranolol. Thereinto, the natural curved channel of basswood could efficiently promote the diffusion process of propranolol and improve the contact efficiency with surface recognition sites. Describing the entire synthetic strategy, the as-prepared PDA-induced Ag & TiO2-modified basswood-based membrane structure had been regarded as a threefold sol-gel imprinted initiated system, thus constructing the propranolol-imprinted sites with key properties of high selectivity and rapid specific-recognizability. Therefore, enhanced adsorption performance of 118.6 mg/g, fast adsorption rate (within 30 min) and high permselectivity rates (more than 3.0) had been successfully harvested, which clearly illustrated the successful preparation of high-intensitive recognizability and permeability toward propranolol from complex separation system.

Automated summary

In this study, Ag & TiO2-based propranolol-imprinted layers were prepared on a basswood membrane surface using a polydopamine-induced self-polymerization/composite strategy. The resulting nanocomposite membranes exhibited excellent specific recognition capability and permselectivity towards propranolol. The natural curved channel of basswood promoted the diffusion process and improved contact efficiency. This study successfully prepared a material with high-intensity recognizability and permeability towards propranolol.