气凝胶
纳米纤维素
吸附
材料科学
水溶液中的金属离子
化学工程
纤维素
层状结构
纳米纤维
乙二胺
羧甲基纤维素
环境友好型
复合数
金属有机骨架
金属
比表面积
纳米颗粒
纳米复合材料
多孔性
水溶液
纳米技术
复合材料
有机化学
化学
核化学
冶金
工程类
钠
生物
生态学
作者
Jiajia Li,Sicong Tan,Zhaoyang Xu
出处
期刊:Nanomaterials
[MDPI AG]
日期:2020-06-05
卷期号:10 (6): 1114-1114
被引量:17
摘要
Currently, the 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 strong and reusable adsorbent by introducing metal-organic framework which modified by ethylene diamine tetraacetic acid (named UiO-66-EDTA) into cellulose nanofiber (CNF) aerogel. Compared to traditional aerogels, the fabricated adsorbent showed a good flexibility and reusability by forming a homogeneous three-dimensional structure. By controlling the concentration of a crosslinkable carboxymethyl cellulose (CMC) solution, we produced aerogels with different pore structures and fibrillar, columnar, and lamellar morphologies. The obtained UiO-66-EDTA/CNF/CMC aerogel (U-EDTACCA) showed an excellent adsorption performance for a total of nine types of heavy metal ions, as the removal efficiency could reach 91%. Moreover, the aerogels could retain 88% of their original shape after five cycles. The aerogel may be an appropriate material for the adsorption of heavy metal ions.
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