新型核壳结构Fe_3O_4/H_xMn_yO_4纳米粒子的制备  

Preparation of novel core-shell structured Fe_3O_4/H_xMn_yO_4 nanoparticles

作　　者：施翔[1] 王东光[1] 竺柏康[1] 徐可染[1] 余文婷[1] 周宗锐[1] 郑祥旭[1] 温彬彬[1] 

机构地区：[1]浙江海洋学院石油化工学院,浙江舟山316000

出　　处：《浙江工业大学学报》2012年第6期642-648,共7页Journal of Zhejiang University of Technology

基　　金：国家科技支撑计划项目(2009BAB47B08);浙江省大学生科技创新活动计划(新苗人才计划)(2009R411026)

摘　　要：采用自制的多通道撞击流反应器合成以纳米Fe3O4为内核,表面均匀包覆碳酸锰的核壳结构载体.用沉淀法在载体上包覆碳酸锂,再浸渍上一定量硝酸锂,形成"三明治"结构的锂离子筛前躯体,焙烧、脱锂后得到新型核壳结构的锂离子筛Fe3O4/HxMnyO4.实验中制备四种锂离子筛前躯体:Fe3O4/MnCO3/Li2CO3,Fe3O4/MnCO3/LiOH,Fe3O4/MnCO3/LiNO3,Fe3O4/MnCO3/Li2CO3/LiNO3,以及Li2CO3与LiNO3不同比例的Fe3O4/MnCO3/Li2CO3/LiNO3,并对不同组合下得到的锂离子筛性能,包括Fe,Mn的溶损率和对Li脱附率进行表征、分析,得出包覆Li2CO3/0.65LiNO3制得的新型锂离子筛性能最好.Abstract： The newly-designed multi-channel impinging stream reactor was first employed to synthesize nano Fe304/MnCO3 carrier. Subsequently, lithium carbonate and lithium nitrate were precipitated on the carrier to obtain sandwich-structured lithium ion sieve precursor, which was calcined to obtain Fe304/LixMnyO4 nanopowders. After this, cation resins were employed to release Li＋ ions from Fe304/LixMny04 suspension to obtain Fe304/HxMnyO4 powders. Furthermore, four kinds of lithium ion sieve precursor including： Fe304/MnCO3/Li2C（）：~, Fe3 04/MnCO3/LiOH, Fe3 04/MnCO3/LiNO3 and Fe3 04/MnCO3/Li2 CO3/LiNO3 were prepared, calcined and investigated their properties to search the optimum precursor. The results indicated that the precursor of Fe3O4/MnCO3/Li2CO3/LiNO3 in which the molar ratio of Li2CO3/LiNO3reached to 0.65 was the best.

关 键 词：反应器 锂离子筛 FE3O4 核壳式 性能 

分 类 号：TQ016[化学工程]