摘要
通过一种简单的种子-固相法合成了橄榄球形铜铁氧体和纳米线形镍铁氧体,合成过程中不需使用任何模板或表面活性剂。通过对产物的晶体结构、形貌和磁特性研究表明:由于种子能为新相的形成提供晶核,种子-固相法有利于制得纯度较高且形貌可控的铁氧体。所制得CuFe2O4的形貌为宽0.4μm、长0.8μm且表面有不规则凹陷的橄榄形粒子,NiFe2O4为直径约10 nm、长径比大于50∶1的纳米线。室温下,橄榄球形CuFe2O4和纳米线形NiFe2O4均表现为典型的超顺磁性。在相同合成条件下,传统固相法合成的两种铁氧体均为纯度较低的铁磁性纳米颗粒。
CuFe2O4 olivary particle and NiFe2O4 nanowire were synthesized by a simple seed-assisted solid state method, without any templates and surfactant assistants. The crystal structures, morphologies and magnetic properties were investigated. The results indicate that the seeds can provide crystal nucleus for generating new ferrite phase. At the same time, the seeds are beneficial for improving the purity and for realizing the shape control. The CuFe2O4 olivary particle, covered with irregular hollows, is about 0.4 μm in width and 0.8 μm in length. The diameter of the NiFe2O4 nanowire is about 10 nm, and the ratio of length to diameter could be up to 50：1. Both CuFeEOg olivary particle and NiFe2O4 nanowire show typical superparamagnetic property at room temperature. However, the ferrites synthesized by traditional solid state method at the same condition as the title method show particle morphologies, low purity and ferromagnetic properties. These results suggest seed-assisted solid state method is an effective way to synthesize high purity ferrites with special shape.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2013年第4期855-860,共6页
Chinese Journal of Inorganic Chemistry
基金
中国博士后基金(No.2011M500511)
国家海洋局青年海洋科学基金(No.2012547)资助项目
关键词
铁氧体
固相法
种子
特殊形貌
超顺磁性
ferrite
solid state method
seed
special shape
superparamagnetism
