Large-Scale Synthesis of Berlin Green Fe[Fe(CN)6] Microcubic Crystals

Berlin green FeFe(CN)6 microcubic crystals have been successfully prepared by a simple hydrothermal process between K3[Fe(CN)6] with Na2S2O3 aqueous solution, free of any surfactant or template. The experimental results clearly show that the molar ratio of K3[Fe(CN)6] to Na2S2O3 and their concentrations are the dominant processing factors in controlling the size, morphology, and composition of the resulting products.