Preparation and characterization of lithium λ-MnO2 ion-sieves  

作　　者：Chang WANG Yanlong ZHAI Xi WANG Ming ZENG 

机构地区：[1]College of Marine Science & Engineering, Tianjin University of Science & Technology, Tianjin 300457, China [2]College of Material Science & Chemical Engineering, Tianjin University of Science & Technology, Tia.ajin 300457, China

出　　处：《Frontiers of Chemical Science and Engineering》2014年第4期471-477,共7页化学科学与工程前沿（英文版）

摘　　要：Abstract Lithium λ-MnO2 ion-sieves were prepared from spinel LiMn2O4 via treatment with nitric acid. The LiMn2O4 was synthesized by a solid state reaction between LiOH· H2O and MnO2. The effects of the calcination time and temperature on the preparation of the LiMn2O4 precursor and the lithium ion-sieve were investigated. In addition, the Li^＋ extraction ratio, the Mn^2＋ dissolving ratio and the adsorption properties of the lithium ion-sieve were all measured. The lithium ion-sieve had a high exchange capacity and was selective for Li^＋. Specifically, at pH = 13, the ion exchange capacity of Li^＋ was 30.9mg/g in 10 mmol/L LiCl solution and the lithium extraction ratio and manganese dissolving ratio were 95% and 25%, respec- tively.Abstract Lithium λ-MnO2 ion-sieves were prepared from spinel LiMn2O4 via treatment with nitric acid. The LiMn2O4 was synthesized by a solid state reaction between LiOH· H2O and MnO2. The effects of the calcination time and temperature on the preparation of the LiMn2O4 precursor and the lithium ion-sieve were investigated. In addition, the Li^＋ extraction ratio, the Mn^2＋ dissolving ratio and the adsorption properties of the lithium ion-sieve were all measured. The lithium ion-sieve had a high exchange capacity and was selective for Li^＋. Specifically, at pH = 13, the ion exchange capacity of Li^＋ was 30.9mg/g in 10 mmol/L LiCl solution and the lithium extraction ratio and manganese dissolving ratio were 95% and 25%, respec- tively.

关 键 词：lithium ion-sieve solid state reaction adsorp-tion LIMN2O4 

分 类 号：TQ137.12[化学工程—无机化工] TM912.9[电气工程—电力电子与电力传动]