海水
铀
材料科学
膜
多孔性
吸附
化学工程
萃取(化学)
极限抗拉强度
复合材料
色谱法
冶金
有机化学
化学
生物化学
海洋学
地质学
工程类
作者
Se Shi,Yongxin Qian,Pingping Mei,Yihui Yuan,Na Jia,Mengyao Dong,Jincheng Fan,Zhanhu Guo,Ning Wang
出处
期刊:Nano Energy
[Elsevier]
日期:2020-05-01
卷期号:71: 104629-104629
被引量:139
标识
DOI:10.1016/j.nanoen.2020.104629
摘要
The oceans contain 4.5 billion tons of uranium which can supply almost infinite nuclear energy. However, it is an urgent need to develop adsorbents simultaneously possessing enhanced efficiency, collect ability, durability and economy to massively extract uranium from seawater. Herein, a simple two-step process is designed to massively produce pure poly(amidoxime) porous network membranes (PAO PNMs) which exhibit high uranium uptake capacity and excellent mechanical strength. The resulting membranes display high hydrophilicity, flexibility, strength (16.98 MPa tensile strength), stiffness (0.55 GPa Young's modulus), and porosity (3D porous network structure) which arise from a modified phase separation technique, providing the membranes a very high adsorption efficiency of 707 ± 5.8 mg-U/g-Ads in 8 ppm uranium spiked seawater and 9.35 ± 0.47 mg-U/g-Ads in natural seawater, respectively. Furthermore, the membranes exhibit a long service life of over 10 cycles of adsorption-desorption, and they can be massively produced via this facile phase separation technique by being simply immersed in water. Overall, coupled with the techno-economic advantages, these PAO PNMs are promising in industrial uranium extraction from seawater due to their robustness, high-efficiency and low-consumption.
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