滴定法测定阴阳离子同时掺杂型Li_xMn_2O_yF_z  

Determination of anion-cation synchronous substitution Li_xMn_2O_yF_z by titration

作　　者：凌翠霞[1] 魏敏[1] 李贯良[1] 李国防[1] 

机构地区：[1]商丘师范学院化学系,河南商丘476000

出　　处：《应用化工》2006年第7期556-558,共3页Applied Chemical Industry

基　　金：河南省科技攻关项目(0624210020)

摘　　要：以L iNO3、L iF和MnNO3为原料,采用溶胶-凝胶-微波法制备出系列L ixMn2OyFz电极材料。然后对每一试样取样三份,用已知浓度的草酸溶液溶解,采用高锰酸钾返滴定法测试试样得电子数,而后在加入盐酸羟胺的条件下,不经离子分离直接用EDTA溶液滴定Mn2+,经数学计算求出L ixMn2OyFz试样中锰的平均价态;离子选择电极法测定F的含量,而后根据物质电中性原则分析材料含氧量并推导L ixMn2OyFz的化学式。Used lithium nitrate, lithium fluoride and anion-cation synchronous spinel LixMn2OyFz were manganese nitrate as starting materials, a series of by sol-gel-microwave method. Every material was qualified and titrated three times. First, the material was used to do redox titration and the total electron number transferred in oxidation-reduction was determined by permanganimetric method. Second, using NH20H · HC1 as reducing agent, the solution was used to determine the total manganese by EDTA titration. And finally, the mean valence of manganese was calculated by the above two results determined, the content of flourine tested by la of LixMn2OyFz, were obtained ion selective electrode, and the content of oxygen and the chemical formuaccording to neutrality principle.

关 键 词：同时掺杂型LixMn2OyFz 滴定分析 锰的平均化合价 

分 类 号：TQ170[化学工程—硅酸盐工业]