Preparation and characterization of lithium λ-MnO2 ion-sieves

作     者：Chang WANG Yanlong ZHAI Xi WANG Ming ZENG 

作者机构：College of Marine Science & Engineering Tianjin University of Science & Technology Tianjin 300457 China College of Material Science & Chemical Engineering Tianjin University of Science & Technology Tia.ajin 300457 China 

出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)

年 卷 期：2014年第8卷第4期

页      面：471-477页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

主　　题：lithium ion-sieve solid state reaction adsorp-tion LiMn2O4 

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.