Abstract: Nano-NaBiO₃ crystals were prepared by oxidizing Bi(NO₃)₃ in strongly alkaline concentrated sodium hypochlorite solution with a strong agitation. The results indicates that the particle size and dispersity of the intermediate product, Bi(OH)₃, are the key factors for the preparation of NaBiO₃. The optimal synthesis conditions were obtained through studying the influence of the concentration of sodium hypochlorite and bismuth nitrate solution and reaction time on the purity and granularity of NaBiO₃. The structure of NaBiO₃ was characterized by TEM, infrared spectroscopy, X-ray diffraction and thermogravimetry. The analysis results reveal that the product is NaBiO₃·2H₂O and its particle size is 30～50 nm.

Key words: Sodium bismuthate, Nano materials, Oxidation synthesis