High adsorption performance of the Mo-doped titanium oxide sieve for lithium ions

Add time:07/31/2019    Source:sciencedirect.com

Titanium oxide lithium ion sieve (Ti-LIS) is regarded as the most promising adsorbent due to its highest theoretical lithium adsorption capacity and excellent stability among various other lithium ion sieves. A new kind of Ti-LIS precursor with Mo-doped was prepared by a facile calcination method. The related lithium ion sieve (Mo-Ti-0.15 (H)) with a high O2– content (61.58%) was obtained by acid pickling. Mo-Ti-0.15 (H) possesses a quite high adsorption capacity, up to 78 mg g−1 in LiOH solution (lithium 1.8 g L−1) at room temperature, which is much higher than that of the other lithium ion sieves reported. In addition, the adsorption isotherm and kinetic of the Mo-Ti-0.15 (H) belong to the Langmuir isotherm and pseudo-second order kinetic equations. Finally, the Mo-Ti-0.15 (H) shows a good stability and excellent selectivity, which was demonstrated by batch experiments.

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