Studying the synthesis regularities of adsorbents based on the oxides Li4Ti5O12 and Li2TiO3

Using solid-phase, hydrothermal and sol-gel synthesis methods, adsorbents based on double oxides Li 2 TiO 3 and Li 4 Ti 5 O 12 were obtained. The influence of the synthesis conditions of samples on their phase composition, surface morphology, texture and adsorption properties was studied. It has been established that as a result of solid-phase synthesis reactions initiated by heating at 700 and 800 °C, single-phase oxides Li 4 Ti 5 O 12 and Li 2 TiO 3 are obtained, the values of the parameter a of the crystal lattice of which are close to the reference data and are 8.289 and 5.026 Å, respectively. The samples have a macromesoporous texture and have a low specific surface area (8 and 9 m 2 /g) and a mesopore volume (0.01 and 0.02 cm 3 /g). The adsorption capacity of the obtained oxides Li 4 Ti 5 O 12 and Li 2 TiO 3 reaches 7.9 and 6.3 mmol/g, respectively. The obtained oxides are of interest for further research as selective adsorbents of Li + ions.