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. 2023 Jul 9;9(7):559. doi: 10.3390/gels9070559

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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XPS spectra of (a) all elements of LR-EPI-8 before and after Cr³⁺ adsorption, (b) Cr 2p_1/2 and Cr 2p_3/2 for LR-EPI-8 after Cr³⁺ adsorption, (c) C 1s, and (d) O 1s for LR-EPI-8 before and after the adsorption.

XPS spectra of (a) all elements of LR-EPI-8 before and after Cr³⁺ adsorption, (b) Cr 2p_1/2 and Cr 2p_3/2 for LR-EPI-8 after Cr³⁺ adsorption, (c) C 1s, and (d) O 1s for LR-EPI-8 before and after the adsorption.