Highly compressible nanocellulose aerogels with a cellular structure for high-performance adsorption of Cu(II)
Highly compressible nanocellulose aerogels with a cellular structure for high-performance adsorption of Cu(II)
复制标题
具有多孔结构的高度可压缩纳米纤维素气凝胶，用于高性能吸附 Cu(II)
DOI：
10.1016/j.chemosphere.2021.132887
复制
发表时间：
2022
期刊：
影响因子：
8.8
通讯作者：
Zhang Shifeng
中科院分区：
文献类型：
--
作者：
Mo Liuting;Tan Yi;Shen Yulin;Zhang Shifeng
Cellulose-based aerogels have considerable potential for various application due to renewable, low cost, and high availability. However, mechanical robustness and functionalization remain major challenges. Here, we synthesized a compressible, recoverable cellulose nanofiber (CNF)/carboxymethyl cellulose (CMC)/branched polyethyleneimine (BPEI) aerogel via electrostatic-modulated interfacial covalent crosslinking and freeze-drying process. The porous BPEI@CNF/CMC aerogel possessed excellent mechanical compression and high-density metal-chelating groups, which exhibited fast adsorption kinetics and high adsorption capacity (452.49 mg g−1) in static copper adsorption process. Furthermore, BPEI@CNF/CMC aerogels displayed excellent recyclability and could still reach 85% after 10 cycles. The integrated analyses of ATR-FTIR and XPS suggested that the predominant adsorption mechanism included electrostatic interaction, ion-exchange and chelation. This strategy provides a sustainable route to fabricate efficient biomass-based adsorbents for selective copper removal from water.
