Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (7): 720-726.DOI: 10.3724/SP.J.1077.2013.12513

• Research Paper • Previous Articles     Next Articles

Synthesis and Properties of Lithium Ion-sieve Precursor Li4Mn5O12

XU Hui1,2, CHEN Chang-Guo1, SONG Ying-Hua2   

  1. (1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China; 2. College of Environmental and Bioengineering, Chongqing Technology and Business University, Chongqing 400067, China)
  • Received:2012-08-21 Revised:2012-11-26 Published:2013-07-20 Online:2013-06-19
  • About author:XU Hui. E-mail: xuhui@ctbu.edu.cn
  • Supported by:

    Natural Science Foundation of Chongqing (CSTC2011JJA50004); Science and Technology Research Projects of Chongqing Education Commission (KJ100723)

Abstract: Adsorption method is the most promising method for extraction of lithium from salt lakes. A new kind of MnO2 ion-sieves with high Li+ selective adsorption property were synthesized. Spinel-type Li4Mn5O12 precursors were synthesized by EDTA-citrate complexing method using LiNO3 and Mn(NO3)2·4H2O as starting materials. MnO2 ion-sieves with Li+ selective adsorption property were prepared by the acid treatment process to extract Li+ from the spinel Li4Mn5O12 precursors. As-prepared samples were characterized by thermo gravimetric, XRD, SEM, FT-IR and Li+ selective adsorption measurements, respectively. The results show that calcination time has a considerable effect on the structure and composition of precursors. The precursor calcined at 400℃ for 24 h has a pure phase of Li4Mn5O12. Final MnO2 ion-sieve and Li4Mn5O12 precursor are about 200 nm spherical pellets and have the same structure of spinel. The maximum adsorption capacity of ion-sieve is about 43.1 mg/g and has the good selection for Li+.

Key words: ion-sieve, Li4Mn5O12, precursor, adsorption

CLC Number: