Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (6): 81-85.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Preparation and Property of Normal Spinel LiMn2O4

Yuan Wen-hui1   wang Chan-yue1  Li Li2   

  1. 1. Guangdong Provincial Key Laboratory of Green Chemicals , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China ;2. School of Environmental Science and Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-07-21 Online:2007-06-25 Published:2007-06-25
  • Contact: 袁文辉(1969-)，博士，副教授，主要从事吸附和膜催化分离研究. E-mail:cewhyuan@scut. edu.cn
  • About author:袁文辉(1969-)，博士，副教授，主要从事吸附和膜催化分离研究.
  • Supported by:

    广东省自然科学基金资助项目(04020126 )

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Abstract:

Super-fine powders of norrnal spinel LiMn2O4 were synthesized by means of EDTA-citric acid (EDTACA) chelating method , with the nitrates of lithium and manganese as the starting materials. The precursor of LiMn2O4 and the synthesized LiMn2O4 powders were then characterized by FTIR, TG-DSC , XRD , SEM , TEM and BET mea-surements. The results show that , when values of n Li：n Mn and n Mn + Li ：nEDTA+CA are respectively 0. 6 and 1: 2 , norrnal spinel LiMn2O4 with slight agglomeration can be synthesized after a calcination for 4h at 600℃ , and the BET specific surface area is 7. 9948m2/g with diameter being as small as 40nm. It is also found that the largest lithium adsorption capacity of the leached LiMn2O4 reaches up to 5. 3 mmol/g.

Key words: λ-MnO2 , LiMn2O4, chelating, adsorption capacity