Ultra-small dispersed Cu x O nanoparticles on graphene fibers for miniaturized electrochemical sensor applications

Jinfeng Zeng; Xiaoteng Ding; Liwei Chen; Le Jiao; Yuze Wang; Christopher D Windle; Qing Han; Liangti Qu

doi:10.1039/c9ra03802g

Ultra-small dispersed Cu _x O nanoparticles on graphene fibers for miniaturized electrochemical sensor applications

RSC Adv. 2019 Sep 9;9(48):28207-28212. doi: 10.1039/c9ra03802g. eCollection 2019 Sep 3.

Authors

Jinfeng Zeng¹, Xiaoteng Ding², Liwei Chen¹, Le Jiao¹, Yuze Wang¹, Christopher D Windle³, Qing Han¹, Liangti Qu¹

Affiliations

¹ Key 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.
² College of Life Sciences, Qingdao University Qingdao 266071 P. R. China.
³ Solar Energy and Advanced Materials Group, Department of Chemical Engineering, University College London Torrington Place London WC1E 7JE UK.

Abstract

A graphene microfiber (GF) modified with ultrafine Cu _x O nanoparticles (Cu _x 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 _x ONPs/GF electrode shows prominent sensitivity, selectivity and long-term operational stability for the detection of H₂O₂. Further work successfully applied this Cu _x ONPs/GF electrode to detection of H₂O₂ in real samples such as milk and human serum. These results indicate that the Cu _x ONPs/GF is a promising mini-sized sensor in electrochemical analysis.