1. Direct hydrothermal synthesis of ternary Li-Mn-O oxide ion-sieves.
- Author
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Zhang QH, Sun SY, Li SP, Yin XS, and Yu JG
- Subjects
- Adsorption, Ions, Kinetics, Microscopy, Electron, Transmission, Nanostructures chemistry, Nanostructures ultrastructure, Nitrogen chemistry, Oxides chemistry, X-Ray Diffraction, Lithium chemistry, Manganese chemistry, Oxides analysis, Oxides chemical synthesis, Temperature
- Abstract
Spinel-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.
- Published
- 2009
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