▎ 摘　　要

In this endeavor, ultra-fine Ce oxide QDs were synthesized via an in-situ approach which itself was divided into two methods exploited to synthesize QDs on the GO nanosheets. Afterward, the obtained product was loaded into the Epoxy (EP) structure and finally applied on the surface. The results affirmed the presence of Ce oxide QDs and the quantum confinement effect in both samples. FT-IR analysis confirmed the presence of different functional groups such as C=C and C-H. UV-Vis outcome showed the interaction of GO nanosheets and CeO2 QDs. The morphology of the surface, QDs distribution on the GO nanosheets, shape, and particle sizes were explored using FESEM and HR-TEM. Lastly, the corrosion suppression of different coatings-pure EP, GO-only-containing EP, or EP loaded with quantum-dots-deposited GO synthesized by two methods-were compared and discussed in detail with the help of EIS and salt spray methods. The result showed that, in the scratched samples, the maximum R-ct of 45,080 ohm.cm(2) was reached when the QDs-modified GO, attaining via the first method, was employed. The overall result denoted the superior performance of the QDs-modified GO nanosheets embedded in the EP coating-most specifically the one synthesized with the first method. (C) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.