Effect of crystal phases of titanium dioxide on adsorption performance of H2TiO3-lithium adsorbent

H2TiO3-lithium adsorbent is obtained from the acid-modified Li2TiO3.The maximum saturated adsorptive capacity of adsorbent comes up to 39.2 mg g−1.Anatase rather than rutile aids the adsorption performance of lithium adsorbent.Refinement is done by the Rietveld method using Materials Studio 5.5.Bond distances and angles in TiO6 octahedrons are used to explain the phenomenon.

Different crystal phases of TiO2 were produced by calcinations of metatitanic acid at various temperatures. H2TiO3-lithium adsorbent was obtained from the acid-modified adsorbent precursor Li2TiO3 which was synthesized by a solid-phase reaction between TiO2 and LiOH·H2O. Effects of crystal phases of TiO2 on the pull-out rate of Li+ from Li2TiO3 and adsorption properties of lithium adsorbent were studied. The results indicate that anatase structure rather than rutile reacted with LiOH·H2O aids the extraction of Li+ and the adsorption performance of lithium adsorbent. The maximum Li+ drawn out ratio from Li2TiO3 reaches 98.69%, and the maximum saturated adsorptive capacity comes up to 39.2 mg g−1.