Amperometric sensing of hydrazine using a magnetic glassy carbon electrode modified with a ternary composite prepared from Prussian blue, Fe3O4 nanoparticles, and reduced graphene oxide

• Published in: Mikrochimica acta (1966) 2017-09, Vol.184 (9), p.3163-3170
• Main Authors: Guo, Weihua, Ma, Jianguo, Cao, Xiaohong, Tong, Xiaolan, Liu, Fen, Liu, Yunhai, Zhang, Zhibin, Liu, Shubo
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Microengineering; Nanochemistry; Nanotechnology; Original Paper
• ISSN: 0026-3672; 1436-5073
• DOI: 10.1007/s00604-017-2289-x

A magnetic glassy carbon electrode (mGCE) was modified with a ternary composite prepared from Prussian blue (PB), magnetite (Fe 3 O 4 ) nanoparticles, and reduced graphene oxide (rGO) in order to obtain an amperometric sensor for hydrazine. The utilization of Fe 3 O 4 facilitates the magnetic immobilization and separation of sensing material, while the use of rGO enhances sensitivity. The surface coverage and the stability of the PB on the modified electrode were considerably improved. The electro-oxidative response to hydrazine was investigated with this modified mGCE using cyclic voltammetry and amperometric. The sensor, typically operated at a voltage of 0.2 V (vs. SCE), displays superior response hydrazine, with a response time of 4 s, a sensitivity of 97.73 μA μM −1  cm −2 and a 13.7 nM detection limit. Graphical abstract A magnetic glassy carbon electrode was modified with a ternary composite prepared from Prussian blue, magnetite nanoparticles, and reduced graphene oxide to obtain a selective amperometric sensor for dissolved hydrazine.