The electrochemical adsorption of Cs+ ion on the protonated Ni-doped MnO2 nanorods

In this work, the high-quality protonated Ni-doped MnO2 (H-Ni-MnO2 NRs) nanorods with a mean diameter of about 15 nm were synthesized by a hydrothermal method, which was successfully applied to Cs+ adsorption under electrochemical process. The as-prepared H-Ni-MnO2 NRs showed high selectivity to Cs+ adsorption in both acidic and neutral media. In particular, the amount of Cs+ adsorption increased with increasing solution pH. The adsorption capacity of H-Ni-MnO2 NRs for Cs+ could reach up to 11.5 mmol.g(-1) at pH 7, much higher than previous reports (0.06-6 mmol.g(-1)). The high adsorption of H-Ni-MnO2 NRs ability could be attributed to their especial morphology, Ni doping, and Mn(III) amount enhancement induced by electrochemical reduction. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

High-quality protonated Ni-doped MnO2 nanorods were successfully synthesized and applied to Cs+ adsorption, showing high selectivity and adsorption capacity, especially in neutral media. The high adsorption ability of H-Ni-MnO2 NRs can be attributed to their special morphology, Ni doping, and Mn(III) amount enhancement induced by electrochemical reduction.