Structural characteristics and sorption properties of lithium-selective composite materials based on TiO2 and MnO2
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A number of nanomaterials containing titanium dioxide and manganese dioxide were synthesized. The effect of synthesis conditions on structural and sorption characteristics for the selective extraction of lithium ions from solutions was studied. The ion-exchange materials were investigated with the methods of electron microscopy, thermogravimetric and X-ray analyses. During thermal synthesis phases of lithium manganese titanium spinel and TiO2 are being formed. Replacing a part of manganese with titanium ions leads to a decrease in the dissolution of Mn and to an increase in chemical stability. Composites with optimal values of selectivity and sorption rates were used to remove lithium ions from solutions with high salt background. The recovery degree of lithium ions under dynamic conditions reached 99%, the highest sorption capacity was found at pH 10.
KeywordsNanoparticles Titanium dioxide Manganese dioxide Lithium Sorption
The work was supported by projects within the framework of programs supported by the National Academy of Science of Ukraine “Fundamental problems of creation of new materials for chemical industry” (Grant No. 49/12).
MC investigated sorption properties of the materials and prepared the manuscript; LR provided porosimetric and thermogravimetric measurements; PO synthesized the samples; YD studied chemical composition and morphology of the samples; OD provided X-ray analysis.
Compliance with ethical standards
Conflict of Interest
The authors declare that they have no competing interests.
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