均相沉淀法合成链状NiCo_2O_4纳米颗粒  

Preparation of NiCo_2O_4 Nanochain Structure by Homogeneous Precipitation Method

作　　者：孟雪飞[1] 郑雪琳[1] 邓平[1] 翁家宝[1] 

机构地区：[1]福建师范大学材料科学与工程学院福建省高分子材料重点实验室,福建福州350007

出　　处：《合成化学》2013年第2期133-136,共4页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金资助项目(51103025);福建省高分子材料重点实验室开放课题资助项目(201205);福建师范大学优秀青年骨干教师培养基金资助项目(2012006)

摘　　要：以醋酸镍、醋酸钴为原料,尿素为沉淀剂,采用均相沉淀法合成了纯的尖晶石型链状纳米NiCo2O4(F),其结构和性能经XRD,SEM,TEM和振动样品磁强计(VSM)表征。研究了分散剂聚乙二醇对F结构、形貌及磁性能的影响。结果表明:350℃煅烧6 h可以得到单相F;未加入PEG-600时F的组成粒径为15 nm,链长为150 nm;加入PEG-600后F粒径减小至9 nm,链长增加至220 nm;F的剩磁和矫顽力都趋近于零,呈现超顺磁性,加入PEG后F的饱和磁化强度明显提高。The spinel-type NiCo204 （F） with nanochain structure was prepared via homogeneous pre- cipitation method from Co（CHaCO0）2 ·4H20 and Ni（CH3COO）2 · 4H20, using urea as the pre- cipitator and polyethylene glycol 600 （ PEG 600） as the disperser. The structure was characterized by XRD, SEM, TEM and VSM. The effect of PEG on the structure, morphology and magnetic properties of F were investigated. The results showed that the precursor can be transformed into single-phase F by calcining at 350℃for 6 h with the diameter of 15 nm and the length of 150 nm, which exhibited superparamagnetism. With the addition of PEG 600, the length of F was increased to 220 nm and the diameter was decreased to 9 nm, which exhibited higher saturation magnetization.

关 键 词：钴酸镍纳米颗粒 尖晶石 均相沉淀法 链状结构 合成 

分 类 号：O614.11[理学—无机化学]