Abstract: β-Ni(OH)₂ flower-like spheres and nanoplates were synthesized by hydrothermal method with strong ammonia water as precipitator and nickel nitrate as nickel source.The synthesis method was easy and simple.Phase structure and morphology of the samples were characterized by XRD and SEM respectively.Results showed that under the same conditions of pH and reaction time,the low temperature was propitious to synthesize β-Ni(OH)₂ flower-like spheres and high temperature was in favor of synthesizing β-Ni(OH)₂nanoplates.Namely,β-Ni(OH)₂ flower-like spheres were obtained at 180 ℃ and β-Ni(OH)₂ nanoplates were prepared at 240 ℃ both for 48.0 h with pH=9.0.Formation mechanisms of flower-like spheres and nanoplates were explored through observing influence of the hydrothermal conditions on the morpho-logies of the samples.

Key words: &beta, -Ni(OH)₂ nanoplates, nickel nitrate, strong ammonia water, hydrothermal method