Amorphous TiO2‐Derived Large‐Capacity Lithium Ion Sieve for Lithium Recovery. Issue 9 (16th June 2020) - Li, Xiaowei
Abstract: The lithium titanium oxide ion sieve with good structural stability and high adsorption capacity is generally considered to be a promising adsorbent for lithium recovery. Herein, the lithium ion sieve precursor Li2 TiO3 was prepared based on amorphous TiO2, and then Li + was acid‐eluted to obtain the lithium adsorbent H2 TiO3, denoted as HTO‐Am. The structure and adsorption properties of HTO‐Am were investigated, and the results demonstrated that the HTO‐Am prepared at the optimum temperature had excellent adsorption properties for Li + . The adsorption process follows pseudo‐second‐order kinetic and Langmuir isotherm equations, indicating that lithium is adsorbed chemically and monolayer on HTO‐Am. HTO‐Am ion sieves were prepared successfully for the first time and exhibited high selectivity, favorable adsorption rate, and cycle performance for Li + . Abstract : For the first time, a lithium ion sieve H2 TiO3 was prepared based on amorphous TiO2 followed by acid elution. It was employed for the recovery of lithium from liquid resources. The as‐prepared adsorbents exhibited fast ion exchange rate, favorable adsorption performance, and excellent selectivity to Li + . The lithium ion sieve H2 TiO3 could be easily regenerated and reused several times.