ZHU Baikang, WANG Dongguang, REN Yiping, ZOU Zhibin, LOU Yinlong, LU Linping" /> Synthesis of a new-style nano magnetic lithium ion sieves</FONT></SPAN>

• 材料化学工程与纳米技术 • Previous Articles     Next Articles

Synthesis of a new-style nano magnetic lithium ion sieves

ZHU Baikang, WANG Dongguang, REN Yiping, ZOU Zhibin, LOU Yinlong, LU Linping   

  • Online:2011-07-05 Published:2011-07-05

新型磁性纳米锂离子筛的合成

竺柏康,王东光,任益枰,邹志斌,楼银龙,卢林平   

  1. 浙江海洋学院石油化工学院

Abstract:

Nano Fe3O4/MnCO3+Li2CO3 precursor was prepared by synchronizing explosive nucleation of Fe3O4 and fast coating of MnCO3+Li2CO3 in a mini-channel impinging stream reactor. Subsequently, the precursor was heat-treated at 450℃ and immersed in dilute hydrochloric acid to obtain nano magnetic lithium ion sieves (LIS) composed of Fe3O4/HxMnyO4. The main factors affecting explosive nucleation and fast coating processes were investigated and optimized. The as-prepared products were characterized by BET, TEM, EDX, and XRD. The mean particle size of nano magnetic LIS was about 40 nm, specific magnetism was 27.581 emu·g-1, and coercive intensity was 138.64 G. Compared with ordinary LIS, nano LIS film had obvious advantages in solid phase diffusion, and promised unique capacity in lithium uptake from seawater.

摘要:

采用狭道式撞击流反应器,将Fe3O4爆发式成核过程与快速包覆MnCO3+Li2CO3薄膜的过程同步进行,制备出具有核壳结构的纳米Fe3O4/MnCO3+Li2CO3前驱体;然后,通过在450℃下高温焙烧和稀酸酸浸脱锂工艺得到一种组成为Fe3O4/HxMnyO4的磁性纳米锂离子筛。实验优化了爆发式成核过程与液相快速包膜过程的主要操作参数。采用BET、TEM、EDX、XRD等手段对产物进行了分析表征。结果表明,磁性纳米锂离子筛的平均粒径约为40 nm,比饱和磁化强度为27.581 emu·g-1,磁矫顽力为