Graphene/Gold nanoparticle composite-based paper sensor for electrochemical detection of hydrogen peroxide

abstract

In this article, we report the convenient preparation of graphene/gold nanoparticle-decorating filter membrane, which could be directly used as electrode for H₂O₂ sensing. The graphene oxide and chloroauric acid are reduced by l-ascorbic acid before covering the paper substrate. The reduced graphene oxide/gold nanoparticle-paper material is characterized by scanning electron microscopy, X-ray diffraction and Raman spectroscopy. The paper composite could be cut into piece and directly used as electrochemical sensor. The electrochemical experimental results show that the paper sensor has satisfying performances in sensing H₂O₂ with the detection limit of 15 μM and the linear range is 8.53–17.35 mM. This work would propose a novel strategy for the applications of graphene in the fields of electroanalysis and sensing.

Keywords:

• Graphene
• gold nanoparticles
• paper
• sensor
• hydrogen peroxide

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (Grant Nos. 21473250 and 21773305) and the Fundamental Research Funds for the Central Universities, the Research Funds of Renmin University of China (Grant No. 16XNLQ04).