NDLI: Preparation of a Cu$_{2}$O/rGO porous composite through a double-sacrificial-template method for non-enzymatic glucose detection

Content Provider	Springer Nature Link
Author	Xie, Haitao Ke, Qirong Xiong, Xiaopeng
Copyright Year	2017
Abstract	We report a double-sacrificial-template method for the fabrication of a Cu$_{2}$O and a reduced graphene oxide (rGO) porous nanocomposite (Cu$_{2}$O/rGO), which has great potential in non-enzymatic glucose detection. Firstly, an aqueous graphene oxide (GO) solution was dispersed in a polystyrene (PS)/cyclohexane (CH) solution to prepare a water-in-oil emulsion at 50 °C. Then, the emulsion was cast onto a glass substrate to evaporate solvents and cooled down to room temperature. During that time, the self-assembly of the GO sheets and the PS chains takes place at the interface. The cooling of the emulsion below the θ temperature of the system PS/CH (34.5 °C) facilitates the precipitation of the PS chains at the interface to form microcapsules. A sponge-like PS/GO composite film was thus obtained after complete evaporation of solvents, where the water droplets in the emulsion served as the first sacrificial template. The PS/GO composite was loaded with copper compounds and was then carbonized to remove the second template of the polymer. In this manner, a free-standing porous nanocomposite of Cu$_{2}$O/rGO was fabricated, and its structure was carefully characterized. The composite was applied as the working electrode in order to take advantages of its porous microstructure, the conductivity of rGO, and the electrochemical performance of crystalline nano-Cu$_{2}$O. The electrochemical responses of the composite to glucose were evaluated at glucose concentration ranging from 20 to 1000 μM. The results evidence that the porous nanocomposite of Cu$_{2}$O/rGO exhibits fast and linear amperometric responses to glucose with excellent sensitivities. Moreover, the stability of the Cu$_{2}$O/rGO composite in the electrolyte solution and its selective response to glucose have been demonstrated to indicate its practical potential.
Starting Page	5652
Ending Page	5660
Page Count	9
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	52
Issue Number	10
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2017-02-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography and Scattering Methods Classical Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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