Recyclable covalent organic frameworks/cellulose aerogels for efficient uranium adsorption

被引：3
作者：
Li, Min [1 ,2 ,4 ]
Qing, Bin [1 ,2 ]
Luo, Haiyan [5 ]
Gao, Wei [1 ,2 ]
Shou, Qinghui [1 ,2 ]
Wu, Shixian [1 ,2 ]
Yao, Haoyu [1 ,2 ]
Liang, Xiangfeng [1 ,2 ]
Liu, Huizhou [1 ,2 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao New Energy Shandong Lab, Qingdao 266101, Peoples R China
[2] Shandong Energy Inst, Qingdao 266101, Peoples R China
[3] Chinese Acad Sci, CAS Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[5] Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266071, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2024年 / 282卷
基金：
中国国家自然科学基金;
关键词：
Covalent organic frameworks; Cellulose; Composites; Adsorption; Uranium;
D O I：
10.1016/j.ijbiomac.2024.137156
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The advancement of efficient, recyclable adsorbents for the economical capture of uranium from seawater is critical for the sustainable progression of nuclear energy. In this work, a unique aerogel composed of covalent organic frameworks (COF-TpTHA)/cellulose nanofibrils (CNF) was synthesized under mild conditions for uranium adsorption. TpTHA/CNF aerogel resolves challenges related to the formability of COF. CNF utilized as the matrix to encapsulate COF-TpTHA in order to improve the dispersion and reinforce the composite materials. The introduction of COF-TpTHA endows CNF aerogel with sufficient active groups for uranium adsorption. X-ray diffraction (XRD) characterization confirmed the successful incorporation of COF while maintaining the type I structure of cellulose. Fourier-transform infrared (FT-IR) spectroscopy further validated the presence of hydrogen bonding interactions between COF and cellulose. The results demonstrated the excellent adsorption efficiency of TpTHA/CNF aerogel towards U(VI), with a maximum adsorption capacity of 177.90 mg g-1 (experiment) for U (VI). Meanwhile, TpTHA/CNF aerogel exhibited favorable adsorption selectivity and reusability. This celluloseencapsulated COF approach offers a simple and promising method for uranium extraction from seawater, demonstrating its significant application potential.
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页数：9
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