Selective Ion Exchange Property of Ni-Fe Prussian Blue Analogue

The selective ion exchange property of Ni-Fe Prussian blue analogue with different valence state of metal ions were studied.By reaction in Cs+solution,the ion exchange process occurred between K+in Ni-Fe Prussian blue and Cs+in solution;in divalent and trivalent metal ion solutions,the ion exchange was mainly happened through the target ion(Cr3+,Sr2+,Cu2+)with K+and Ni 2+in Ni-Fe Prussian blue.Combined with ICP and Mssbauer spectrums analysis,Ni-Fe Prussian blue showed the highest ion exchange selectivity for Cs+in mixed aqueous solution.It was found that their prior selective ion exchange activities were sequenced as following:Cs+Sr2+Cr3+Cu2+.