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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。
The synthesis of petal-shaped β-Ni (OH) 2 spheres and β-Ni (OH) 2 nanosheets with nickel nitrate as nickel source and concentrated aqueous ammonia as precipitating agent was studied. The synthesis method is simple and easy. The phase and morphology of the synthesized samples were analyzed by XRD and SEM respectively. The results showed that when the pH value and reaction time were the same, the low temperature was conducive to the synthesis of petal-like β-Ni (OH) 2 spheres and the high temperature was conducive to the synthesis of β-Ni (OH) 2 nanosheets. When the reaction time was 48.0 h and the pH value was 9.0, the petaloid β-Ni (OH) 2 spheres were synthesized at 180 ℃. The β-Ni (OH) 2 nanosheets were synthesized at 240 ℃. The formation mechanism of petaloid β-Ni (OH) 2 spheres and β-Ni (OH) 2 nanosheets was investigated by investigating the effect of hydrothermal conditions on the morphology of the product.