Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 190, Issue -, Pages 968-974Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.09.083
Keywords
Mercury; Carbon nanotubes; Anodic stripping voltammetry; Modified electrode
Funding
- Program for NSFC [51072172, 51272219]
- RFDP [20124301110006]
- International Joint Research Program of Hunan Province [2013WK3036]
- Open Project of Hunan Provincial University Innovation Platform [12K050]
- Construct Program of the Key Discipline in Hunan Province
Ask authors/readers for more resources
Based on the unique electronic properties and high surface area of carbon nanotubes as well as the chemical interaction between thiol group and Hg(II), a novel electrochemical sensor for the determination of Hg(II) in water was fabricated by the immobilization of thiophenol functionalized single-walled carbon nanotubes (SWCNT-PhSH) onto the gold electrode surface. Various factors such as pH, preconcentration time, deposition potential, and deposition time influencing the determination of Hg(II) were thoroughly investigated in this study. Under optimal conditions, the electrochemical sensor exhibited a wider linearity range from 5.0 nM to 90 nM Hg(II) with a detection limit of 3.0 nM (S/N = 3). Interferences from other heavy metal ions such as Cr(II), Mn(II), Fe(II), Co(II), Ni(II), Cu(II), and Zn(II) ions associated with Hg(II) analysis were effectively inhibited. This novel sensor was successfully applied to determine Hg(II) in real water samples with good recovery, ranging from 97-103%. The analytical performance of the as-fabricated electrochemical sensor is superior to most existing sensors. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available