Preparation and characterization of graphene oxide supported Cu, Cu2O, and CuO nanocomposites and their high photocatalytic activity for organic dye molecule
- Authors
- Choi, Jonghoon; Oh, Hana; Han, Sang-Wook; Ahn, Seokhoon; Noh, Jaegeun; Park, Joon B.
- Issue Date
- Feb-2017
- Publisher
- ELSEVIER
- Keywords
- Copper oxide; Graphene; Photocatalyst; Organic dye; X-ray photoelectron spectroscopy
- Citation
- CURRENT APPLIED PHYSICS, v.17, no.2, pp.137 - 145
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 17
- Number
- 2
- Start Page
- 137
- End Page
- 145
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/152945
- DOI
- 10.1016/j.cap.2016.11.020
- ISSN
- 1567-1739
- Abstract
- 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.
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