Electrochemistry of ZnO@reduced graphene oxides

• Published in: Carbon (New York) Vol. 130; pp. 480 - 486
• Main Authors: Hao, Junxing, Ji, Liudi, Wu, Kangbing, Yang, Nianjun
• Format: Journal Article
• Language: English
• Published: New York Elsevier Ltd 01.04.2018; Elsevier BV
• Subjects: Atomic force microscopy; Atomic structure; Chemical composition; Electrochemical analysis; Electrochemistry; Energy transmission; Fourier transforms; Graphene; Lead; Microstructure; Morphology; Nanocomposites; Organic chemistry; Particulate composites; Reduced graphene oxide; Scanning electron microscopy; Sensing applications; Transmission electron microscopy; Voltammetry; X-ray diffraction; Zinc oxide; ZnO; Electrochemistry; ZnO; Reduced graphene oxide; Sensing applications
• ISSN: 0008-6223; 1873-3891
• DOI: 10.1016/j.carbon.2018.01.018

To explore electrochemistry of the composites of ZnO and reduced graphene oxides (rGO), graphene oxide (GO) was in-situ reduced with Zn powders. The morphology and micro-structure of synthesized ZnO@rGO composites were characterized using scanning electron microscopy, transmission electron microscopy, and atomic force microscope. Energy dispersive spectroscopy, X-ray diffraction, Raman, and Fourier Transform infrared spectroscopy were employed to clarify the chemical composition of ZnO@rGO composites. Electrochemical properties of ZnO@rGO composites were studied using cyclic voltammetry and impedance, revealing a large surface area and many active sites. Accordingly, electrochemical sensing of a neutral organic dye Sudan I and a charged metal ion Pb2+ was achieved on ZnO@rGO composites. The strategy of in-situ reduction of GO with Zn powders thus owns great application prospects in constructing a universal and sensitive electrochemical sensing platform. [Display omitted]