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. 2021 Nov 26;12:100172. doi: 10.1016/j.fochx.2021.100172

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© 2021 The Authors

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 5 — FTIR spectrum and Congo red staining (A-C) FTIR spectra of nSiO₂, polysaccharides and polysaccharides-nSiO₂ interaction products. (D, E) The maximum absorption wavelength of polysaccharides and polysaccharides-nSiO₂ interaction products-Congo red complex at different concentrations of NaOH. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)