Constructing the Electron-Rich Microenvironment of an All-Polymer-Based S-Scheme Homostructure for Accelerating Uranium Capture from Nuclear Wastewater

• DOI: 10.1021/acs.est.4c04881
• Publication Date: 2024-08-14T15:15:48Z
• Authors: Qi Meng; Linzhen Wu; Tao Chen; Ying Xiong; Tao Duan; Xiangke Wang
• Keywords: Nuclear Fuel; Depleted Uranium

Large quantities of uranium-containing radioactive wastewater are typically generated during nuclear fuel cycle processes. Despite significant efforts, efficient capture migratable hexavalent uranium U(VI) is still a huge challenge due to its acidity, radioactivity, coexisting organics, and high impurity cation abundance in wastewater. Herein, we have fabricated all-polymer-based 0D/2D C4N/C6N7 homostructure hybrids with an S-scheme electronic configuration by coordinating the band engineering semiconductors enrich species from complex environment. The sample can over 97% actual concentration industrial reprocessing wastewater; also, enrichment ratio exceeds 95% when irradiation dose (including α, β, γ) up 100 kGy. Density functional theory X-ray absorption spectroscopy demonstrate that aggregation charge carriers on surface regulates electron-rich microenvironment, thus accelerating reduction conversion single electron reaction disproportionation. It expected this work provide more insight into other materials, thereby promoting removal advancements