High-Crystallinity Titanium Lithium Ion Sieve and Granulated Composite of High Stability and Porosity: Superb Adsorption and Recycling Performance
Yajing Hao, Yidi Wang, Ye Wang, Xiao-Jing Guo, Xi Yan, Yan Chen, Xuan Zhang, Wan‐Zhong Lang
Abstract
In this study, high-crystallinity and small-particle-size Li 2 TiO 3 nanocrystals were prepared through the reaction between anatase TiO 2 and Li 2 CO 3 in a LiCl molten salt and ethanol medium. The Cl – ions reacted with TiO 2 to increase the solubility of TiO 2 and strengthen the dissolution–precipitation mechanism for Li 2 TiO 3 preparation. The particle diffusion process was found to be the rate control process for the adsorption of Li + ions. A porous spherical lithium ion adsorbent named HTO–PVC-PANn was prepared using a phase transformation approach. Polyvinyl chloride (PVC was modified with carboxyl groups as a binder, and poly(acrylonitrile) (PAN) was used as a pore former. The interaction between PVC and HTO and PAN was thus strengthened to improve the adsorbent stability. The developed HTO–PVC-PANn adsorbent shows excellent absorption capabilities, stability, and reduced dissolution loss.