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以硝酸镍、尿素为原料,在醇–水介质中,85℃恒温条件下,用均匀沉淀法制备出花状纳米片自组装结构Ni(OH)2沉淀,该沉淀经400℃煅烧制得具有花状形貌的NiO纳米片自组装体。采用X射线衍射、扫描电镜、透射电镜、Fourier变换红外光谱、Brunauer-Ennett-Teller(BET)比表面积方法对粉体进行表征。研究表明:该NiO粉体为六方结构,其纳米片尺寸约为2μm×3μm,厚度约为100nm,曲面间隙约为0.8μm,具有微孔结构。BET法测得粉体的比表面积为108.66m2/g,制得的粉体具有明显的纳米效应,Ni—O键振动峰值(403.6cm–1)较非纳米颗粒(487.1cm–1)蓝移了84.5cm–1,乙醇对花状结构NiO纳米片自组装体的形成具有重要作用。分析了花状NiO纳米片自组装体的形成机理。
The Ni (OH) 2 precipitation of flower-like nanosheets was prepared by homogeneous precipitation with nickel nitrate and urea as raw materials in alcohol-water medium at 85 ℃. The precipitate was calcined at 400 ℃ to obtain Flower-like morphology of NiO nanosheet self-assembly. The powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and Brunauer-Ennett-Teller (BET) surface area method. The results show that the NiO powder has a hexagonal structure with a size of about 2μm × 3μm, a thickness of about 100nm and a curved surface of about 0.8μm. BET method measured the specific surface area of the powder is 108.66m2 / g, the obtained powder has obvious nanometer effect, peak value of Ni-O bond (403.6cm-1) than the non-nanoparticle (487.1cm-1) With 84.5cm-1, ethanol plays an important role in the formation of flower-like NiO nanosheet self-assembly. The formation mechanism of flower-like NiO nanosheet self-assembly was analyzed.