文献类型：会议论文

英文题名：LiMn₂O₄ spinel direct synthesis and lithium ion selective adsorption

作者：Zhang, Qin-Hui[1];Li, Shao-Peng[1];Sun, Shu-Ying[1];Yin, Xian-Sheng[1];Yu, Jian-Guo[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Coll Chem Engn, Shanghai 200237, Peoples R China

会议论文集：20th International Symposium on Chemical Reaction Engineering

会议日期：SEP, 2008

会议地点：Kyoto, JAPAN

语种：英文

外文关键词：Adsorption; Ion exchange; Lithium; Manganese; Nanostructure; Separation

摘要：The cubic phase LiMn2O4 spinel is synthesized via a directly soft chemistry method via hydrothermal reaction of Mn(NO3)(2). LiOH and H2O2 at 383 K for 5-10 h, more favorable to control the nanocrystalline structure with well-defined pore-size distribution and high surface area than traditional solid-phase reaction at high temperature. Further, the 1D MnO2 nanorod ion-sieves with lithium ion selective adsorption property is prepared by the acid treatment process to completely extract lithium ions from the LiMn2O4 lattice. The effects of hydrothermal conditions on the nanostructure, chemical stability and ion-exchange property of the LiMn2O4 spinel and MnO2 ion-sieve are examined via powder X-ray diffraction (XRD), N-2 adsorption-desorption at 77K, high-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED) and lithium ion selective adsorption measurements. The results show that the 1D MnO2 nanorods might be utilized in lithium extraction from aqueous environment including brine, seawater and waste water. (C) 2009 Elsevier Ltd. All rights reserved.