Ultrafast Photoassisted Capture of Uranium over Cu2O/CuO Heterojunction Enabled by Rapid Interfacial Electron Transfer

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-12-19 DOI:10.1021/acsmaterialslett.4c0212110.1021/acsmaterialslett.4c02121

Huanhuan Liu, Hongliang Guo, Dingping Huang, Li Zhou, Jia Lei*, Yan Liu* and Wenkun Zhu*,

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引用次数: 0

Abstract

Photoassisted capture of uranium provides a promising strategy for the sustainable utilization of nuclear energy. Herein, we constructed Cu₂O/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 Cu₂O/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 Cu₂O/CuO heterojunctions was 5.8-time larger than that of pure Cu₂O. A mechanism study indicated that the photogenerated electrons reduced CuO species in Cu₂O/CuO heterojunctions and in situ created the oxygen vacancy during the photocatalysis process, which strengthened the binding of UO₂²⁺. The rapid electron transfer rate over the in situ heterojunction interfaces and the enhanced UO₂²⁺ binding strength by the in situ formed oxygen vacancy accounted for the ultrafast reaction kinetics.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.