Fig. 3: Micro morphology of sorbent spheres for the lithium extraction.
From: Efficient cation separation based on humidity control and adsorption
a Stitched SEM image of cross-section of polyacrylonitrile-chitosan composite sphere after lithium extraction, with corresponding EDS mapping of (b) nitrogen, (c) oxygen, (d) sodium and (e) chloride. f 3D X-ray scanning image of the adsorbent spheres after lithium extraction. TOF-SIMS mapping images of (g) lithium and (h) Na elemental near the center of the sphere after lithium extraction (marked by a red box in Fig. 3a). XPS analysis of adsorption spheres after lithium extraction for (i) lithium, (j) sodium and (k) oxygen.
