Rapid and selective capture of hazardous benzotriazole UV stabilizer UV-328 using molecularly imprinted hollow fibers

This paper describes molecular design of a large-scale fibrous 2D material for the efficient removal of UV-328, a benzotriazole-based UV absorber listed as a persistent, bioaccumulative, toxic substance. The material, a hollowfiber mat, is created on the basis of conjugated microporous polymer and sacrificial support, in which specific recognition sites are embedded via surface imprinting. The resulting mat demonstrates rapid adsorption, up to 25 mg g-1 of UV-328 within 2 h, surpassing control adsorbents without hollow structures or imprinted binding sites. Furthermore, the mat exhibits high selectivity for UV-328 over other benzotriazole analogs, with further improvements in adsorption rates and selectivity observed in a vacuum membrane filtration system. This design concept holds promise for capturing other persistent pollutants and would be more enhanced with stimuliresponsive binding or synergistic functions using additives.