以六水合硝酸镍为原料,采用简易溶剂热法制备了具有分等级结构的氧化镍纳米片-花状微球.采用X-射线衍射(XRD)、扫描电镜(SEM)和高分辨率透射电镜(HR-TEM)、傅立叶变换红外光谱(FT-IR)等测试技术对其物相形貌进行分析表征.结果表明:在脲素存在条件下,利用醇热法可以合成花状碱式硝酸镍前驱体,在经400℃热处理2h后,形成了由薄片组成的花状微球,并且由于二次结晶过程,在原来的球体表面形成了扇面状平滑单晶薄片,厚度约为几十纳米.整个晶体生长过程,出现了溶解-再结晶的现象,即可以通过溶解-再结晶的过程来实现对氧化镍微观形貌的调控;并初步探讨了这种具有分等级结构的纳米片-花球结构的形成机理.
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