Polymer microsphere-confined in-situ growth of MOF-303@poly(acrylate)composites for rapid atmospheric water harvesting under arid conditionsOA

Metal-organic frameworks(MOFs)have emerged as exceptional materials for atmospheric water harvesting(AWH)due to their superior adsorption properties in low humidity conditions(≤20%RH),but most MOF adsorbents typically exist in powder form,thus their aggregation induces significant transfer resistance to limit their adsorption kinetics and practical application potential.Here we prepared an organic-inorganic MOF-303@poly(acrylates)composite by in-situ growing MOF-303 within porous poly(acrylates)spheres.Our results demonstrate that the 87%loading of MOF-303@poly(acrylates)exhibits uniformly dispersed crystals with a crystal size that is 40%smaller compared to pure MOF-303 powder,while maintaining a water vapor adsorption capacity of 0.348 g·g^(−1)at 20%RH and 298 K,which is comparable to that of an equivalent mass of the pure MOF-303 powder.In the dynamic water vapor test with a constant flow rate(50 mL·min^(−1)),the adsorption and desorption rates of the composite are 2.74 and 2 times faster than those of MOF-303 powder.After 100 consecutive adsorption and desorption cycles at 1780 mL·min^(−1)(0.95 m·s^(−1),light air),the water vapor adsorption capacity showed no significant decline.This composite strategy not only enhances adsorption kinetics but also advances MOF-based AWH systems for engineering applications.