Li4Ti5O12 was synthesized by the sol-gel process under different conditions, and the as-prepared products were characterized by XRD in order to find out the ideal condition of preparing Li4Ti5O12. The precursor sol was loaded on porous ceramics synthesized from kaolin, talcum powder, alumina and carbon powder, and then Li4Ti5O12 based on porous ceramics was prepared after drying and calcination. Subsequently, porous ceramic-based lithium ion adsorbent was obtained by modification with hydrochloric acid, and then adsorptive capacity of the obtained product was measured. The results indicate that increasing calcination temperature and holding time is beneficial to the formation of Li4Ti5O12. The products with good crystallinity and purified crystal phase are obtained after a calcination at 750 ~ 800 ℃ for 5 ~ 8 h. The extraction rate of Li+ from Li4Ti5O12 and the adsorptive capacity are increased with the increment of calcination temperature and holding time. The Li+ drawn out ratio of the products calcined at 800 ℃ for 5 h is 51.7 %, and the adsorptive capacity reaches 12.2 mg Li+/g Li4Ti5O12.
