How Is Nickel Ii Borate Synthesized?

Nickel(II) borate can be synthesized by reacting nickel(II) acetate and sodium borohydride in the presence of boric acid as a catalyst. First, a solution of nickel(II) acetate is prepared in water. Then, a solution of sodium borohydride and boric acid is added slowly to the nickel(II) acetate solution under constant stirring. The reaction mixture is heated to 80-90°C for several hours to complete the reaction. After cooling, the resulting precipitate is filtered, washed with water and dried at room temperature. The product obtained is greenish-blue in color and has the chemical formula NiB2O4. This synthesis method can be used to produce high-quality nickel(II) borate with good purity and crystallinity.