文献类型：会议论文

英文题名：Direct Hydrothermal Synthesis of Ternary Li-Mn-O Oxide Ion-Sieves

作者：Zhang, Qin-Hui[1];Sun, Shu-Ying[1];Li, Shao-Peng[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：5th Interdisciplinary Transport Phenomena - Fluid, Thermal, Biological, Materials and Space Sciences

会议日期：OCT 14-19, 2007

会议地点：Univ SE Calif/Rostislaw Kaichew Inst Phys Chem, Bansko, BULGARIA

主办单位：Univ SE Calif/Rostislaw Kaichew Inst Phys Chem

语种：英文

外文关键词：hydrothermal synthesis; Li-Mn-O; ion-sieve; low-dimensional; separation

摘要：Spines-type ternary LiMn(2)O(4) oxide precursor was synthesized by direct hydrothermal synthesis of Mn(NO(3))(2), LiOH, and H(2)O(2) at 383 K for 8 h, a better technique for controlling the nanocrystalline structure with well-defined pore size distribution and high surface area than the traditional solid state reaction method. The final low-dimensional MnO(2) nanorod ion-sieve with a lithium ion selective adsorption property was further prepared by an acid treatment process to completely extract lithium ions from the Li-Mn-O lattice. The effects of hydrothermal reaction conditions on the nanostructure, chemical stability, and ion-exchange property of the LiMn(2)O(4) precursor and MnO(2) ion-sieve were systematically examined via powder X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), and lithium ion selective adsorption measurements. The results show that this new kind of low-dimensional MnO(2) nanorod can be used for lithium extraction from aqueous environments, including brine, seawater, and waste water.