One-Step Double Emulsion via Amphiphilic Se–N Supramolecular Interactions: Towards Porous Multi-cavity Beads for Efficient Recovery Lithium from Brine

摘要: Abstract Efficient recovery lithium ions (Li+) from brine is a recognized challenge with potential strategic and economic implications. In this work, one-step double emulsion reactors, based on amphiphilic Se N supramolecular interactions between phenyl selenium bromide (PhSeBr) polystyrene-b-polyvinylpyridine (PS-b-P4VP), was constructed to prepare porous multi-cavity beads (PMCB). After immobilizing aminoethyl benzo-12-crown-4 (B12C4-NH2) through post-interface modification strategy, the resultant sorbents (PMCB-B12C4) were adopted for selective separation enrichment Li+ brine. PMCB-B12C4 possessed surface pores, multiple interconnected chambers, abundant crown ether receptors, dynamic adjustable mechanism structure turning volume fraction also studied. adsorption in best approximated by Langmuir Hill isotherms showing homogeneous heterogeneous surface, calculated maximum monolayer capacities are 61.35 mg g−1 59.53 mg g−1, respectively. Kinetic study reveals good agreement pseudo-second order, chemical mainly dominates process. The mass transfer depicts that both membrane inter-particle diffusion involved inhibition rate can selectively simulated samples selectivity coefficient (α) relative (αr) as high >5.0 6.0, still retains significant uptake capacity owing specific “size matching” effect of ether. Moreover, regenerated mild acid exhibits nearly consistent after five reuse cycles. Thus, work not only reports new clue fabricate sorbent via droplet reactor, but provides novel platform extraction.