Fig. 1: Synthesis process and structural characterization of COS-Dyes-Al. | npj Materials Sustainability

Fig. 1: Synthesis process and structural characterization of COS-Dyes-Al.

From: Chitosan based chromium free tanning system for reducing the carbon footprint to leather production process

Fig. 1: Synthesis process and structural characterization of COS-Dyes-Al.The alternative text for this image may have been generated using AI.

a The principle of synthesis of COS-Dyes-Al. b FT-IR and (c–e) 1H-NMRof COS-E, COS-T, and COS-R. f–g C1s and O1s spectra of COS-E, COS-T, and COS-R mixtures (mass ratio of COS-E:COS-T: COS-R = 1:1:1). h–i C1s and O1s spectra of COS-Dyes-Al. j Al2p spectra of COS-Dyes-Al.

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