Ultrafast Photoassisted Capture of Uranium over Cu2O/CuO Heterojunction Enabled by Rapid Interfacial Electron Transfer
Source abstract
Abstract
Photoassisted capture of uranium provides a promising strategy for the sustainable utilization of nuclear energy. Herein, we constructed Cu 2 O/CuO heterojunctions in situ by a wet-etching method, showing ultrafast reaction kinetics and photocatalytic activity for U(VI) reduction. In 8 ppm of uranium-containing wastewater, the Cu 2 O/CuO heterojunctions exhibited a remarkable uranium extraction efficiency of 94.6% within 10 min under irradiation, which exceeded most recently reported photocatalysts. The photocatalytic reaction rate constant of Cu 2 O/CuO heterojunctions was 5.8-time larger than that of pure Cu 2 O. A mechanism study indicated that the photogenerated electrons reduced CuO species in Cu 2 O/CuO heterojunctions and in situ created the oxygen vacancy during the photocatalysis process, which strengthened the binding of UO 2 2+ . The rapid electron transfer rate over the in situ heterojunction interfaces and the enhanced UO 2 2+ binding strength by the in situ formed oxygen vacancy accounted for the ultrafast reaction kinetics.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Radioactive element chemistry and processing · Advanced Photocatalysis Techniques · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions
Soochow University
State Key Laboratory of Environment-friendly Energy Materials, CAEA Innovation Center of Nuclear Environmental Safety Technology, School of Materials and Chemistry, School of National Defense & Nuclear Science and Technology
Southwest University of Science and Technology
College of Chemistry and Materials Science
Anhui Normal University
Funding
China Postdoctoral Science Foundation · Science and Technology Department of Sichuan Province · National Natural Science Foundation of China · State Key Laboratory of Environmental-friendly Energy Materials · Southwest University of Science and Technology · CNNC Key Laboratory for Uranium Extraction from Seawater
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