Adsorption of lithium ions on novel nanocrystal MnO2

Various polymorphs of MnO2 were synthesized under a controlled hydrothermal method. The structure characteristics and ion exchangeability were studied by XRD, TEM, Li+Li+ adsorption isotherm, kinetics and selectivity measurement. The MnO2 nanowires, mainly about 5×400nm in diameter and length, are found to have a remarkable lithium ion-sieve property with equilibrium distribution coefficients (Kd)(Kd) in the order of Na+