Selective electrochemical removal of cesium ion based on nickel hexacyanoferrate/reduced graphene oxide hybrids

A co-precipitation strategy is developed to prepare the reduced graphene oxides (RGOs) supported nickel hexacyanoferrate (NiHCF) nanoparticles. The NiHCF nanoparticles were uniformly deposited on RGOs with a size distribution of 60 nm. The NiHCF/RGO hybrids exhibit a reversible current response to alkali ion, and the ion exchange can be controlled by the applied potentials. As an electrochemical-switched ion exchange (ESIX), NiHCF/RGO hybrids...