Abstract

Currently, preparation of outstanding adsorbents has attracted public concern in environmentally friendly and sustainable pollutant redress. Herein, we report a directional freeze-drying method to prepare a flexible and reusable adsorbent through introducing modified metal-organic framework material (UiO-66-EDTA) into cellulose nanofibers (CNF) aerogel. By controlling the concentration of crosslinkable carboxymethy cellulose (CMC) solution, we produced aerogels with different pore structures, fibrillar, columnar and lamellar morphology. The obtained UiO-66-EDTA/CNF/CMC aerogel (U_-EDTACCA) showed excellent adsorption performance for total 9 types of heavy metal ions with the removal efficiency reaching 91%. Moreover, the aerogels could retain 88% of its original shape after 5 times cycling. The aerogel may be appropriate material for adsorbing heavy metal ions.

Keywords: nanocellulose aerogel, metal-organic framework, heavy metal ions, adsorption, directional freeze-drying

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Li, J.; Tan, S.; Rong, N.; Zhang, K.; Xu, M.; Xu, Z. Beilstein Arch. 2019, 2019107. doi:10.3762/bxiv.2019.107.v1

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