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Direct Hydrothermal Synthesis of Ternary Li‐Mn‐O Oxide Ion‐Sieves
Author(s) -
Zhang QinHui,
Sun ShuYing,
Li ShaoPeng,
Yin XianSheng,
Yu JianGuo
Publication year - 2009
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2008.04325.x
Subject(s) - selected area diffraction , inorganic chemistry , materials science , high resolution transmission electron microscopy , nanocrystalline material , nanorod , spinel , chemical engineering , mesoporous material , lithium (medication) , ternary operation , hydrothermal synthesis , hydrothermal circulation , chemistry , transmission electron microscopy , nanotechnology , catalysis , medicine , biochemistry , endocrinology , computer science , engineering , metallurgy , programming language
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.