Water stable MIL-101(Cr)/polyacrylonitrile/agarose aerogel for efficient 2, 4-dichlorophenoxyacetic acid adsorption

In this work, novel MIL-101(Cr)/polyacrylonitrile/agarose aerogels (MIL-101(Cr)/PANNs/AG) as efficient adsorbents with hierarchical pores were prepared via a facile physical mixture method combining hydrogen bond self-crosslinking without any chemical linkers. The water stability and underwater compressible of the composite aerogel are improved by incorporating polyacrylonitrile nanofibers. MIL-101(Cr)/PANNs/AG aerogels are well characterized systematically and the adsorption performance for 2, 4-dichlorlophenoxyacetic acid (2, 4-D) is also measured and investigated. The well-preserved micropores and accessibility of MIL-101(Cr), endow the composite aerogels excellent absorption ability in water treatment and purification. When the mass loading of MIL-101(Cr) nanoparticles is 50%, the composite aerogels reach the large specific surface area of 356.91 m(2).g(-1). The composite aerogels demonstrate high adsorption ability towards for 2, 4-D (339.87 mg.g(-1)).