Enhanced Uranium Extraction via Charge Dynamics and Interfacial Polarization in MoS2/GO Heterojunction Electrodes

This study introduces a novel molybdenum disulfide/graphene oxide heterojunction (MoS2/GO-H) electrode for effective uranium ion (UO22+) removal from water through capacitive deionization (CDI). Employing an innovative electroadsorption-electrocatalysis system (EES) strategy that leverages interface polarization at the MoS2 and GO interface, it significantly enhances removal efficiency, achieving over 90% uranium removal in the presence of competing ions. AbstractThe removal of uranyl ions (UO22+) from water is challenging due to their chemical stability, low concentrations, complex water matrix, and technical limitations in extraction and separation. Herein, a novel molybdenum disulfide/graphene oxide heterojunction (MoS2/GO-H) is developed, serving as an effective electrode for capacitive deionization (CDI). By combining the inherent advantages of electroadsorption and electrocatalysis, an innovative electroadsorption-electrocatalysis system (EES) strategy is introduced. This system utilizes interface polarization at the MoS2 and GO interface, creating an additional electric field that significantly influences carrier behavior. The MoS2/GO-H electrode, with its extraordinary adsorption capacity of 805.57  mg g−1 under optimal conditions, effectively treated uranium-laden wastewater from a mine, achieving over 90% removal efficiency despite the presence of numerous competing ions at concentrations significantly higher than UO22+. Employing density functional theory (DFT)...
Source: Small - Category: Nanotechnology Authors: Tags: Research Article Source Type: research