Ultra-small dispersed Cu O nanoparticles on graphene fibers for miniaturized electrochemical sensor applications
Jinfeng Zeng1, Xiaoteng Ding2, Liwei Chen1
1Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 100081 P. R. China qhan@bit.edu.cn.
Abstract:
A graphene microfiber (GF) modified with ultrafine Cu O nanoparticles (Cu ONPs/GF) has been fabricated by direct annealing of electrodeposited nano-sized copper-based metal organic frameworks (HKUST-1) and used as an electrode for nonenzymatic H2O2 sensing. Benefiting from the unique microfiber architecture and synergetic effects, as well as strong coupling between components with many active sites and boosted electron transport, the Cu ONPs/GF electrode shows prominent sensitivity, selectivity and long-term operational stability for the detection of H2O2. Further work successfully applied this Cu ONPs/GF electrode to detection of H2O2 in real samples such as milk and human serum. These results indicate that the Cu ONPs/GF is a promising mini-sized sensor in electrochemical analysis.
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