水热法合成花瓣和纳米片β-Ni(OH)_2及其表征

Hydrothermal Synthesis and Characterization of β-Ni(OH)_2 Petal-shaped Sphere and Nanoplate

以硝酸镍为镍源,浓氨水为沉淀剂,水热法合成了花瓣状β-Ni(OH)2球和β-Ni(OH)2纳米片,该合成方法简单易行。利用XRD和SEM分别对合成试样进行物相和形貌分析。研究结果表明:当pH值和反应时间均相同时,低温有利于合成花瓣状β-Ni(OH)2球,高温有利于合成β-Ni(OH)2纳米片。当反应时间为48.0h和pH值为9.0时,180℃下合成了花瓣状β-Ni(OH)2球;240℃下合成了β-Ni(OH)2纳米片。通过考察水热条件对产物形貌的影响,探讨了花瓣状β-Ni(OH)2球和β-Ni(OH)2纳米片的形成机制。

β-Ni（OH）2 petal-shaped sphere and nanoplate were synthesized by hydrothermal method with strong ammonia as the precipitator and nickel nitrate as the nickel source.The above synthesis method is simple and easy to operate.The phase structure and morphology were analyzed using XRD and SEM.The results show that under the same pH value and reaction time,low temperature is good for the synthesis of β-Ni（OH）2 petal-shaped sphere,while high temperature is good for the synthesis of β-Ni（OH）2 nanoplate.β-Ni（OH）2 petal-shaped sphere and nanoplate are obtained at 180 ℃ and 240 ℃,respectively,both by reacting at pH 9.0 for 48.0 h.Based on the effects of hydrothermal synthesis conditions on morphology of the sample,the formation mechanism of β-Ni（OH）2 petal-shaped sphere and nanoplate is discussed.