外加磁场条件下镍纳米材料的形貌可控制备(英文)  

Morphology-Controlled Synthesis of Nickel Nanostructures under Magnetic Fields

作　　者：龚春红[1,2] 杜陈强[1] 张玉[1] 吴志申[1] 张治军[1] 

机构地区：[1]河南大学特种功能材料教育部重点实验室,开封475004 [2]河南大学化学化工学院,开封475004

出　　处：《无机化学学报》2009年第9期1569-1574,共6页Chinese Journal of Inorganic Chemistry

基　　金：科技部973(No.2007CB607606);河南大学校内基金(No.07YBZR005)资助项目

摘　　要：在常压下,采用外加磁场辅助的液相还原法制备得到了直径约为250nm镍纳米晶纤维。磁性能测试结果表明镍纤维的饱和磁化强度为8.94emu·g-1,矫顽力为133.8Oe,说明得到的镍纤维具有铁磁性能。此外,还研究了溶剂种类对产物微观结构和形貌的影响。结果表明,产物的形貌受溶剂种类的影响十分明显,只有分子结构中含有2个端羟基的醇类溶剂才可以用来制备形貌均一的超细镍纤维。A facile chemical reduction method was established to fabricate uhrafine Ni fibers with a diameter of about 250 nm using external magnetic field-assisted self-assembly under normal pressure. Magnetic hysteresis measurement revealed that the Ni fibers showed ferromagnetic behavior with a saturation magnetization of 8.94 emu. g^-1 and a coercivity of 133.80e at room temperature. Moreover, different alcohol-type solvents were selected to control the microstructures and morphologies of the nickel products. As a result, it is found that the morphologies of the Ni nanocrystallites are closely related to the types of the solvents and only the solvents with double hydroxyl groups colud be used for the preparation of the Ni fibers.

关 键 词：镍 磁场 溶剂种类 形貌 

分 类 号：O614.813[理学—无机化学]