磁场辅助法制备钴纳米线  

Preparation of Cobalt Nanowires by Magnetic-field-assisted Method

作　　者：廖立[1] 谢克难[1] 黎明[1] 王虎[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2015年第2期205-208,共4页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家青年自然科学基金资助项目(50904046)

摘　　要：为扩展废旧硬质合金中钴的回收再利用价值,采用"磁场辅助法"从纯化后的废旧硬质合金回收液中液相还原制备钴纳米线,并考察其在空气中的热稳定性。研究结果表明:有无外加磁场的作用是决定产物形貌的关键因素。磁场作用下,可以得到平均直径在500 nm左右,长度能达到40μm的钴纳米线;而无磁场作用时,只能得到球状的无明显排列取向的钴颗粒。当温度低于225.0℃时,制备的钴纳米线在空气中有较好的热稳定性,具有较好的催化应用潜力。既能提高废旧硬质合金的回收再利用价值、发展钴资源循环利用经济,又对指导1维磁性金属纳米线特别是钴纳米线的制备与应用具有重要的基础理论和实际意义。In order to improve the recycling value of waste hard alloy,Cobalt nanowires were synthesized by a magnetic-field-assisted method from acid leaching solution of waste hard alloy. The morphology and thermal stability of cobalt nanowires were tested. The experiments showed that the external magnetic field is the key factor to the morphology of products. With external magnetic field,the cobalt nanowires with an average length of 40 μm and diameter of 500 nm were synthesized. Meanwhile under the same preparation conditions but without external magnetic field,the spherical cobalt particles with no significant arrangement were prepared. When the temperature was less than 225. 0 ℃,the cobalt nanowires prepared by this method had good air thermal stability. The study would not only improve the recycling value of waste hard alloy and stimulate the development of recycling economy of cobalt resource,but also have important theoretical basis and practical significance for guiding the preparation and applications of one-dimensional magnetic metal nanowires,especially cobalt nanowires.

关 键 词：磁场辅助法 钴纳米线 热稳定性 

分 类 号：TB383.1[一般工业技术—材料科学与工程]