摘要
In general, when ferricyanide and copper compounds are employed as precursors in the synthesis of copper hexacyanoferrate (CuHCF), the reaction tends to proceed rapidly, often resulting in products with poor crystallinity. The swift reaction rate can cause the CuHCF nanoparticles to form irregularly, thereby preventing the manifestation of the material’s intrinsic properties. To address this, we synthesized a complex precursor comprising a chelating agent and copper ions, which was then used to chelate ferricyanide, enabling a more controlled and stable synthesis of CuHCF. Chelating agents such as EDTA are commonly employed for the adsorption of heavy metal ions, including copper. In this study, we utilized the chelating properties of EDTA to
achieve the stable synthesis of CuHCF. The resulting CuHCF nanoparticles were not annealed, and the surface retained COOH- groups with a negative potential, which facilitated the reduction of metals on the CuHCF surface.