Influence of structural characteristics on sorption properties of lithium-selective composite materials based on TiO<sub>2</sub> and MnO<sub>2</sub>
Abstract
Novel composite materials with equimolar ratio of TiO2 to MnO2 have been synthetized. Using the low-temperature N2 adsorption method their structural characteristics were calculated; and their influence on selectivity and kinetics of lithium sorption was shown. It was proved that sorption characteristics of the obtained materials are defermined by conditions of heat treatment during the synthesis. Higher temperatures provoke agglomeration of sorbent and decrease in its kinetic characteristics. At the same time, more lithium-selective sorption sites are formed and the selectivity of sorption increases. By the proposed synthesis method a highly selective to lithium ion-exchange material was obtained.References
1. Nishihama S., Onishi K., Yoshizuka K. Selective recovery process of lithium from seawater using integrated ion exchange methods. Solvent Extr. Ion Exch. 2011. 29(3): 421. https://doi.org/10.1080/07366299.2011.573435
2. Hunter James C. Preparation of a new crystal form of manganese dioxide: λ-MnO2. J. Solid State Chem. 1981. 39(2): 142. https://doi.org/10.1016/0022-4596(81)90323-6
3. Chitrakar R., Kanoh H., Miyai Y., Ooi K. A new type of manganese oxide (MnO2·0.5H2O) derived from Li1.6Mn1.6O4 and its lithium ion-sieve properties. Chem. Mater. 2000. 12(10): 3151. https://doi.org/10.1021/cm0000191
4. Feng Q., Kanoh H., Ooi K. Manganese oxide porous crystals. J. Mater. Chem. 1999. 9: 319. https://doi.org/10.1039/a805369c
5. Tretyak M.O., Rozhdestvenska L.M., Belyakov V.N. Inorganic ion exchange materials based on hydrated titanium dioxide as selective ionites for lithium ion recovery. Ukr. Chem. J. 2013. 79: 15. [in Russian].
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