Green synthesis of the reduced graphene oxide-CuI quasi-shell-core nanocomposite: A highly efficient and stable solar-light-induced catalyst for organic dye degradation in water

被引:44
作者
Choi, Jiha [1 ,2 ]
Reddya, D. Amaranatha [1 ,2 ]
Islam, M. Jahurul [1 ,2 ]
Seo, Bora [3 ]
Joo, Sang Hoon [3 ,4 ]
Kim, Tae Kyu [1 ,2 ]
机构
[1] Pusan Natl Univ, Dept Chem, Busan 609735, South Korea
[2] Pusan Natl Univ, Chem Inst Funct Mat, Busan 609735, South Korea
[3] Ulsan Natl Inst Sci & Technol, Dept Chem, Ulsan 689798, South Korea
[4] Ulsan Natl Inst Sci & Technol, Sch Energy & Chem Engn, Ulsan 689798, South Korea
基金
新加坡国家研究基金会;
关键词
CuI-RGO nanocomposite; Rhodamine-B photodegradation; Simulated sunlight; Retrievable photocatalyst; Water remediation; PHOTOCATALYTIC ACTIVITY; METHYLENE-BLUE; DOPED TIO2; COMPOSITE; ADSORPTION; STABILITY; ZNS; NANOPARTICLES; REMOVAL;
D O I
10.1016/j.apsusc.2015.07.170
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:159 / 167
页数:9
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