期刊
APPLIED SURFACE SCIENCE
卷 358, 期 -, 页码 159-167出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2015.07.170
关键词
CuI-RGO nanocomposite; Rhodamine-B photodegradation; Simulated sunlight; Retrievable photocatalyst; Water remediation
类别
资金
- National Research Foundation of Korea (NRF) - Korean government (MEST) [2013S1A2A2035406, 2013R1A1A2009575, 2014R1A4A1001690]
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [2013S1A2A2035406, 2013R1A1A2009575, 2014R1A4A1001690]
- National Research Foundation of Korea [2013R1A1A2009575, 2013S1A2A2035406] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Surfactant-free, reduced graphene oxide (RGO)-CuI quasi-shell-core nanocomposites were successfully synthesized using ultra-sonication assisted chemical method at room temperature. The morphologies, structures and optical properties of the CuI and CuI-RGO nanocomposites were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transformed infrared spectroscopy (FTIR), UV-visible absorption spectroscopy, and photoluminescence (PL) spectroscopy. Morphological and structural analyses indicated that the CuI-RGO core-shell nanocomposites comprise single-crystalline face-centered cubic phase CuI nanostructures, coated with a thin RGO quasi-shell. Photocatalysis experiments revealed that the as-synthesized CuI-RGO nanocomposites exhibit remarkably enhanced photocatalytic activities and stabilities for photo degradation of Rhodamine-B (RhB) organic dye under simulated solar light irradiation. The photo degradation ability is strongly affected by the concentration of RGO in the nanocomposites; the highest photodegradation rate was obtained at a graphene loading content of 2 mg mL(-1) nanocomposite. The remarkable photocatalytic performance of the CuI-RGO nanocomposites mainly originates from their unique adsorption and electron-accepting and electron-transporting properties of RGO. The present work provides a novel green synthetic route to producing CuI-RGO nanocomposites without toxic solvents or reducing agents, thereby providing highly efficient and stable solar light-induced RGO-CuI quasi-shell-core nanocomposites for organic dye photo degradation in water. (C) 2015 Elsevier B.V. All rights reserved.
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