Voltammetric Determination of Rhodamine B Using a ZIF-67/Reduced Graphene Oxide Modified Electrode. (3rd June 2020)

• Record Type: Journal Article
• Authors: Ngo, Huynh Truong; Nguyen, Vo Thang; Manh, Tran Duc; Toan, Tran Thanh Tam; Triet, Nguyen Thi Minh; Binh, Nguyen Thanh; Hoan, Nguyen Thi Vuong; Thien, Tran Vinh; Khieu, Dinh Quang
• Other Names: Liu Yu Guest Editor.
• Is Part Of: Journal of nanomaterials. Volume 2020(2020)
• Publication Date: 2020-06-03
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2020/4679061
• Languages: English
• ISSNs: 1687-4110

Abstract

Abstract : In the present article, the synthesis of zeolite imidazolate framework-67/reduced graphene oxide (ZIF-67/rGO) and voltammetric determination of Rhodamine B (RhB) are demonstrated. The obtained materials were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen adsorption/desorption isotherms. It was found that the ZIF-67/rGO composite consists of ZIF-67 nano-particles highly dispersed on the rGO matrix and possesses a high specific surface area. Because of the synergistic effect of good conductivity of rGO and high surface area of ZIF-67, the ZIF-67/rGO—modified glassy carbon electrode exhibits good electrochemical behavior toward Rhodamine B (RhB) oxidation. The use of this electrode to quantitate RhB with differential pulse voltammetric method was successful with a broad linear range, from 0.96 to 44.07 μ g.L -1 of RhB and a low limit of detection of 1.79 μ g.L -1 . The procedure was able to be applied to quantitatively determine RhB content in several food samples with an exceptional recovery rate (98-103%). The quantitative results highly agreed with that provided by high-performance liquid chromatography, revealing that this material is promising in in situ monitoring of other illegal additives in food.