Paper-based electrochemical transducer modified with nanomaterials for mercury determination in environmental waters

SENSORS AND ACTUATORS B-CHEMICAL

卷:290

Article

Sanchez-Calvo, A.¹  Fernandez-Abedul, M. T.¹  Blanco-Lopez, M. C.¹  Costa-Garcia, A.¹ 

[1] Univ Oviedo, Fac Quim, Dept Quim Fis & Analit, E-33006 Oviedo, Spain

关键词: Paper electrodes;    Carbon nanomaterials;    Gold nanoparticles;    Mercury;    Low-cost analysis;    Decentralized analysis;   

DOI  :  10.1016/j.snb.2019.03.089

来源: Elsevier

【 摘 要 】

A sensor for Hg (II) determination in water was developed by using paper working electrodes modified with nanomaterials. The cellulose matrix was modified with hybrids of carbon nanofibers (CNFs) or reduced graphene oxide (rGO) and gold nanoparticles (AuNPs), in order to increase the selectivity and sensitivity. The AuNPs helped the electrodeposition of Hg (II) at more positive potentials, due to their affinity for mercury. The determination was possible up to 1.2 mu M with no interference of other heavy metals such as Cd (II), Pb (II), Cu (II) and Zn (II). The CNFs/AuNPs modified paper-based electrode was the most sensitive option with a detection limit of 30 nM. River water samples were evaluated by the standard addition method.

【 授权许可】

Free