摘要
以硫酸镍为主盐、水合肼为还原剂,添加诱导剂次亚磷酸钠,利用液相还原法制得纳米镍粉;采用扫描电子显微镜、光电子能谱仪、X射线衍射仪分别对纳米镍粒子的微观形貌、组分、物相结构进行表征,研究硫酸镍与水合肼的配比、诱导剂含量对纳米镍粒子的形貌及晶格参数的影响。结果表明:纳米镍粒子粒径随硫酸镍与水合肼物质的量比的增大而增大,当两者物质的量比大于1∶2时,镍、磷原子共沉积过程占主导,影响镍原子有效形核;增加诱导剂的浓度至0.4 mol/L,纳米镍粒子的晶格发生畸变,形成非晶结构。
To prepare nickel nano-particles,the reduction process of liquid phase with NiSO4 as main salt,N2H4 .H2O as reductant, NaH2PO2 .H2O as inducer was used. The micro-morphology, component and functional structure of the nickel nano-particles were characterized with scanning electron microscope (SEM). energy dispersive spectrometry (EDS) and X ray diffraction (XRD). The effects of raw molar ratio n(NiSO4):n (N2H4·H2O),inducer on the micro-morphologies and lattice parameters of the nickel nano-particles were studied. The results show that particle sizes of the powders increase with increasing raw molar ratio n (NiSO4):n (N2H4·H2O). When the raw molar ratio excesses 1:2, the reaction is controlled by simultaneously depositing process of Ni-P nano-particles, which can inhabits the nucleation of nickel particles. The lattice distortion aggravates to form amorphous nickel nano-particles with increasing inducer contention to 0.4 mol/L.
出处
《中国粉体技术》
CAS
北大核心
2014年第6期56-59,共4页
China Powder Science and Technology
基金
国家自然科学基金青年科学基金项目
编号:51201111
四川省科技创新苗子工程项目
编号:2012CZ004
四川理工学院研究生创新基金项目
编号:y2013024
关键词
液相还原
纳米镍粉
诱导剂
非晶结构
reduction process of liquid phase
nickel nano-particles
inducer
amorphism