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Abstract Highly efficient and selective adsorption materials for the removal and recycling of U(VI) from radioactive wastewater or seawater are increasingly in demand due to the severe scarcity of strategic… Click to show full abstract
Abstract Highly efficient and selective adsorption materials for the removal and recycling of U(VI) from radioactive wastewater or seawater are increasingly in demand due to the severe scarcity of strategic uranium sources for nuclear engineering. In this study, a three-dimensional (3D) hierarchical reduced graphene oxide/ethylenediamine scaffold (3D rGOE) was constructed using a direct-ink-writing-based 3D printing method. This technique contained orderly aligned microstructures, good hydrophilicity, mechanical robustness, and a high specific surface area. The optimized 3D rGOE structure obtained by multiscale and rational chemical modification exhibited a significantly higher U(VI) adsorption capacity (908 mg/g at pH = 5.8) compared to other previously reported amino/graphene-oxide-based composites. Additionally, the 3D rGOE mostly retained its high adsorption capacity (decay rate
Journal Title: Carbon
Year Published: 2021
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