Preparation of Polyethylenimine‐Functionalized Graphene Oxide Composite and Its Application in Electrochemical Ammonia Sensors |
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| Authors: | Min Song Juan Xu |
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| Institution: | 1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, P.?R. China tel.: +86?25?83794744;2. fax: +86?25?83795508 |
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| Abstract: | In this study, branched polyethyleneimine (PEI) was covalently linked to carboxylic acid functionalized graphene (GO‐COOH) to form GO‐COOH/PEI composites. Transmission electron microscopy, Fourier transform infrared spectroscopy, Raman spectra and thermogravimetric analysis were used to characterize the obtained composites. Electrochemical measurements indicated that the modification of the composites on the electrode could efficiently enhance the voltammetric response, suggesting the potential application for making electrochemical sensors. Moreover, our results also indicated that the electrocatalytic oxidation of ammonia could be observed on the GO‐COOH/PEI composites modified glassy carbon electrode. Consequently, our observations demonstrated that GO‐COOH/PEI composites were excellent materials for electrochemical sensing. |
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| Keywords: | Graphene Polymer Composite materials Ammonia Electrochemical oxidation |
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