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. 2022 Sep 14;14(18):3844. doi: 10.3390/polym14183844

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© 2022 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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(a) FTIR spectra of the CTS/CSH, CTS/CSH/TiO₂, and CTS/CSH/TiO₂/Gr composite films; (b) Graph normalized to the hydroxyl peak intensity; (c) Typical CTS/CSH/TiO₂/Gr composite film (TiO₂:Gr = 6:4) fabricated at various ultrasonication powers.