摘要
用水热法合成了β-Ni(OH)2单晶纳米薄片,并用透射电子显微镜观察其显微结构。发现这些纳米薄片呈六边形,横向尺寸45 nm^140 nm,厚度20 nm^50 nm。六边形纳米片的上下表面是(001),六个侧面可确定为(100),(110)或(0 10),紧邻侧面夹角120°。六角结构的β-Ni(OH)2呈六边形时系统能量最低。β-Ni(OH)2纳米薄片经500℃热分解即转化为NiO单晶纳米卷、纳米槽和纳米片。NiO纳米结构的外缘尺寸为25 nm^120 nm,纳米卷内空尺寸10 nm^24 nm,纳米槽凹坑尺寸10 nm^20 nm。β-Ni(OH)2纳米薄片中可能存在缺陷、微孔或结晶较差的区域,这些区域的热分解速率快,有利于形成NiO纳米卷。
Single-crystal β-Ni（OH）2 nanoplates of hexagonal phase have been synthesized through hydrothermal method. The nanoplates possess well-defined shapes with sharp edges, and exhibit hexagonal shapes with landscape dimension of 45 nm - 140 nm and thickness of 20 nm - 50 nm. The in-plane surfaces of hexagonal-shaped nanoplates lies on （001）, and-the side surfaces of hexagonal-shaped nanoplates are （100）, （0 10） and （110）. Post-thermal decomposition of the β-Ni（OH）2 nanoplates led to the formation of single-crystal NiO nanostructures including nanorolls, nanotroughs and nanoplates with landape dimension of 25 nm - 120 nm. The sizes of the central holes in NiO nanorolls and the low-lying grounds in NiO nanotroughs were in the range of 10 nm - 24 nm. The formation mechanisms of the above nanostructures were discussed.
出处
《电子显微学报》
CAS
CSCD
2007年第3期179-183,共5页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金资助项目(No.10474019)
教育部"新世纪优秀人才支持计划".~~
