The synthesis and characterization of thiol-based aryl diazonium modified glassy carbon electrode for the voltammetric determination of low levels of Hg(II)

Tehila Shahar, Noam Tal, Daniel Mandler*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Electrochemical determination of Hg(II) in aquatic solutions on bare and modified glassy carbon electrode (GCE) is reported. Optimizing the parameters used for a bare GCE, such as the electrolyte solution, the potential and time of deposition, resulted in linear response over a large range of Hg(II) concentrations (4-160 ppb) using linear sweep anodic stripping voltammetry. Modification of the electrode with 4,4′-disulfanediyldibenzenediazonium (DSBD) yielded a lowest detection limit of 1 ppb. Two procedures for DSBD synthesis are described for the first time, and the product was characterized by microanalysis, FTIR and 1H-NMR. The electrochemical attachment of DSBD to the electrode was studied and compared with the electrochemical behaviour of DSBD analogous molecules, i.e. 4-aminophenyl disulfide, p-aminothiophenol and phenyl disulfide.

Original languageAmerican English
Pages (from-to)1543-1552
Number of pages10
JournalJournal of Solid State Electrochemistry
Volume17
Issue number6
DOIs
StatePublished - Jun 2013

Bibliographical note

Funding Information:
This work was supported by the Hydronet Project ( http://www.hydronet-project.eu ) and partially by the Singapore National Research Foundation under CREATE programme: “Nanomaterials for Energy and Water Management”.

Keywords

  • Diazonium
  • Glassy carbon
  • Mercury
  • Surface modification
  • Voltammetry

Fingerprint

Dive into the research topics of 'The synthesis and characterization of thiol-based aryl diazonium modified glassy carbon electrode for the voltammetric determination of low levels of Hg(II)'. Together they form a unique fingerprint.

Cite this