Choi, Jonghoon Oh, Hana Han, Sang-Wook Ahn, Seokhoon Noh, Jaegeun Park, Joon B. 2024-01-20T02:30:14Z 2024-01-20T02:30:14Z 2021-09-01 2017-02 1567-1739 https://pubs.kist.re.kr/handle/201004/123131 A highly efficient synthetic route was successfully developed to prepare crystallized and well dispersed Cu, Cu2O, and CuO nanoparticles (NPs) on reduced graphene oxide (rGO) by controlling the impregnation condition of a copper-precursor (Cu(NO3)(2)center dot 3H(2)O) on graphene oxide (GO) and subsequent thermal treatments. The morphological and chemical structures of the nanocomposites were systemically evaluated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS), and transmission electron microscopy (TEM). The rGO based CuOx nanocomposites exhibited a much higher catalytic activity than bare CuOx NPs toward the decomposition reaction of dye molecules under visible light illumination. Among the CuOx/rGO nanocomposites, CuO/rGO showed excellent photocatalytic efficiency and recyclability without significant loss of activity. Based on the XPS, XRD, XAFS, and TEM results, the high photocatalytic efficiency of the CuO/rGO can be attributed to the synergistic combination of dye adsorptivity and electron acceptability of the rGO, the surface hydroxyl species in the CuO/rGO, and the narrow band gap and smaller size of the CuO NPs. This work could be applied to the removal and water treatment of waste dye. (C) 2016 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV ABSORPTION FINE-STRUCTURE HIGH-PERFORMANCE PHOTOCATALYST X-RAY FACILE PREPARATION METHYLENE-BLUE COMPOSITE DEGRADATION SURFACE NANOSTRUCTURES ENHANCEMENT Preparation and characterization of graphene oxide supported Cu, Cu2O, and CuO nanocomposites and their high photocatalytic activity for organic dye molecule Article 10.1016/j.cap.2016.11.020 1 CURRENT APPLIED PHYSICS, v.17, no.2, pp.137 - 145 CURRENT APPLIED PHYSICS 17 2 137 145 scie scopus kci ART002196690 000393245500004 2-s2.0-85002169875 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article ABSORPTION FINE-STRUCTURE HIGH-PERFORMANCE PHOTOCATALYST X-RAY FACILE PREPARATION METHYLENE-BLUE COMPOSITE DEGRADATION SURFACE NANOSTRUCTURES ENHANCEMENT Copper oxide Graphene Photocatalyst Organic dye X-ray photoelectron spectroscopy