Synthesis of High Specific Surface Lithium ion Sieve Templated by Bacterial Cellulose for Selective Adsorption of Li+

Abstract In recent years, the lithium market has ushered in a golden period of development. With the development of batteries, ceramics, glass, lubricants, refrigerants, the nuclear industry and the optoelectronics industry, the demand for lithium has grown rapidly, and continuous mining has led to scarcity of land resources. On the other hand, due to the rich lithium resources in sea water and salt lake brines. How to selectively adsorb and separate lithium ions from seawater and salt lake brine has attracted more and more scholars' attention and research. Lithium ion sieve stands out because of its excellent performance of specific adsorption and separation of lithium ions. This article reports the preparation of mesoporous TiO 2 and LiOH hydrothermal reaction using bacterial cellulose as a biological template. After calcination at 600°C, spinel lithium titanium oxide Li 2 TiO 3 is formed. H 2 TiO 3 was obtained by eluting the precursor with HCl eluent. FT-IR, SEM and XRD were used to characterize Li 2 TiO 3 and H 2 TiO 3 . The adsorption performance of H 2 TiO 3 was studied through adsorption pH, adsorption kinetics, adsorption isotherms, competitive adsorption and so on. The results show that H 2 TiO 3 is a single layer chemical adsorption process, which has a good adsorption effect on lithium ions at pH 11.0, with the maximum adsorption capacity can reach 35.45 mg·g − 1 . The lithium ion sieve has selective adsorption to Li + , and its distribution coefficient is 2242.548 mL g − 1 . It may be predicted that the lithium-ion sieve prepared by biological template has a broad application prospect.