Preparation of H2TiO3@GO for rapid adsorption of Li+ and its adsorption behaviour

In order to improve the adsorption capacity and rate of lithium-ion sieves (H2TiO3), graphene oxide (GO) was introduced as a soft carbon material to prevent the agglomeration of Li2TiO3 by utilizing the structural attributes of the GO carrier. The ultrafine LTO@GO lithium ion sieve (particle diameter 40 nm) was prepared by a two-step process including a sol–gel co-mixture step and a solid-state calcination step. Furthermore, [email protected] lithium ion sieves were identified as the optimal ratio with a high adsorption capacity of 38.3 mg·g-1. The crystallinity of the (-133) and (312) facets of [email protected] were improved to 86.62% and 74.67% by XRD analysis, indicating an improvement in the acid resistance of the structure. The hydroxyl group content in HTO@GO was 41.79% higher than 35.72% in HTO from XPS survey of HTO@GO and HTO, which is benefit to increase adsorption capacity. Next, the HTO@GO adsorption rate was investigated to reach adsorption equilibrium shortened from 24 h to 14 h compared with HTO. The results indicate that HTO@GO has good industrial potential with fast Li+ adsorption.