Figure 2
From: Hierarchical Porous Chitosan Sponges as Robust and Recyclable Adsorbents for Anionic Dye Adsorption
(a) Digital and SEM images of Ch-3, Ch-5, Ch-8, Ch-10, Ch-20, and Ch-40 chitosan foams. Schemes present the evolution process of the “cell wall” in a side view as the decrease of chitosan solution concentration. (b) Densities of the chitosan foams. (c) FT-IR spectra of Ch-3, Ch-5, Ch-8, Ch-10, Ch-20, and Ch-40 chitosan foams.
