材料科学
吸附
气凝胶
复合数
碳化
化学工程
放射性废物
复合材料
核化学
扫描电子显微镜
有机化学
化学
工程类
作者
Wenkun Zhu,Jian Zhang,Mingxin Li,Huilin Ge,Yang Li,Tao Duan,Wenkun Zhu
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2019-08-27
卷期号:30 (45): 455602-455602
被引量:46
标识
DOI:10.1088/1361-6528/ab3991
摘要
With the development of nuclear energy, the removal/recovery of radionuclides has attracted increasing attention. Here, an ultra-light, super-elastic, konjac glucomannan/graphene oxide composite aerogel (KGCA) as a high performance adsorbent for radionuclide removal/recovery was fabricated by a three-step process of freeze-casting, freeze-drying, and carbonization. The as-prepared bionic structured KGCA showed ultralow density, high specific surface area, desirable super-elasticity, and abundant oxygen-containing functional groups. Batch adsorption results demonstrated the maximum adsorption capacity of uranium (U(VI)) on KGCA is as high as 513.4 mg g−1, far exceeding other biomass carbon aerogels. Furthermore, KGCA showed good radiation stability, selective adsorption of U(VI), and high recycling performance. The KGCA also showed good adsorption properties even under simulated seawater or high salt concentration. Thus, these ultra-light and super-elastic biomass-derived composite aerogels could have a wide range of applications for nuclear wastewater treatment in the future.
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