Preparation and characterization of AuNPs/CNTs-ErGO electrochemical sensors for highly sensitive detection of hydrazine

TALANTA

卷:158

Article

Zhao, Zhenting^1,2  Sun, Yongjiao^1,2  Li, Pengwei^1,2  Zhang, Wendong^1,2  Lian, Kun^1,2  Hu, Jie^1,2  Chen, Yong³ 

[1] Taiyuan Univ Technol, Minist Educ, Key Lab Adv Transducers & Intelligent Control Sys, Micro & Nano Syst Res Ctr, Taiyuan 030024, Shanxi, Peoples R China

[2] Taiyuan Univ Technol, Coll Informat Engn, Taiyuan 030024, Shanxi, Peoples R China

[3] Ecole Normale Super, CNRS, ENS, UPMC,UMR 8640, F-75005 Paris, France

关键词: Reduced graphene oxide;    Carbon nanotubes;    Au nanoparticles;    Hydrazine sensor;   

DOI  :  10.1016/j.talanta.2016.05.065

来源: Elsevier

【 摘 要 】

A highly sensitive electrochemical sensor of hydrazine has been fabricated by Au nanoparticles (AuNPs) coating of carbon nanotubes-electrochemical reduced graphene oxide composite film (CNTs-ErGO) on glassy carbon electrode (GCE). Cyclic voltammetry and potential amperometry have been used to investigate the electrochemical properties of the fabricated sensors for hydrazine detection. The performances of the sensors were optimized by varying the CNT5 to ErGO ratio and the quantity of Au nanoparticles. The results show that under optimal conditions, a sensitivity of 9.73 mu A mu M-1 cm(-2), a short response time of 3 s, and a low detection limit of 0.065 mu M could be achieved with a linear concentration response range from 0.3 M to 319 mu M. The enhanced electrochemical performances could be attributed to the synergistic effect between AuNPs and CNTs-ErGO film and the outstanding catalytic effect of the Au nanoparticles. Finally, the sensor was successfully used to analyse the tap water, showing high potential for practical applications. (C) 2016 Elsevier B.V. All rights reserved.

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