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. 2019 Aug 21;10:3775. doi: 10.1038/s41467-019-11643-6

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Silver nanoparticles in simplified suspension under simulated sunlight. Silver ions (Ag⁺) at 0.93 mM were incubated with particular organic matter (POM) at 143.2 mg C L⁻¹ at pH 8.6. a UV–Vis spectra of AgNPs in liquid phase (insert showing the color evolution of the sample over time). b TEM images of AgNPs in liquid and particulate phase and the respective EDS analysis after 24 h of incubation with POM. c XRD analysis of Ag loaded onto POM. d XPS analysis after the incubation of Ag⁺ with POM for 24 h