Flexible self-standing amidoxime-functionalized MXene membrane for electrochemical uranium extraction

Area of Science:

• Environmental Science
• Materials Science
• Electrochemistry

Background:

• Radioactive uranium (U(VI)) in wastewater poses ecological and health risks.
• Electricity-driven remediation is a promising strategy for radionuclide removal.
• Conventional electrodes have limitations due to adhesive use.

Purpose of the Study:

• To develop an efficient self-supporting membrane electrode for uranium extraction.
• To utilize amidoxime-functionalized Ti3C2Tx MXene (TCP) for enhanced adsorption.
• To investigate the electrochemical behavior and extraction mechanism of uranium.

Main Methods:

• Fabrication of a self-supporting membrane electrode using amidoxime-functionalized Ti3C2Tx MXene (TCP).
• Incorporation of polyamidoxime (PAO) into Ti3C2Tx interlayers via non-covalent bonds.
• Application of alternating current (AC) voltage for electrochemical separation and enrichment of uranium.

Main Results:

• The TCP membrane electrode exhibited a high uranium extraction capacity of 2809 mg/g.
• Porous structure and abundant binding sites were achieved through PAO incorporation.
• Uranium ions were effectively concentrated and precipitated as Na2O7U22.

Conclusions:

• The TCP membrane electrode demonstrates excellent performance for U(VI) extraction from radioactive solutions.
• The facile preparation and high efficiency make it a promising candidate for wastewater treatment.
• This technology offers a sustainable approach to managing radioactive contaminants.