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Electrochemical sensor based on 1,8-dihydroxyanthraquinone adsorbed on a glassy carbon electrode for the detection of [Cu(CN)3](aq)2− in alkaline cyanide copper plating baths waste

  • Andy A. Cardenas-Riojas
  • , Anthony Felix Cornejo-Herrera
  • , Golfer Muedas-Taipe
  • , Adolfo La Rosa-Toro
  • , Maria D.P.T. Sotomayor
  • , Miguel Ponce-Vargas
  • , Angélica M. Baena-Moncada

Research output: Contribution to journalArticle (Contribution to Journal)peer-review

15 Scopus citations

Abstract

This work reports the fabrication of a novel electrochemical sensor for the detection of the complex ion [Cu(CN)3](aq)2−, one of the main components of the effluents from cyanide alkaline copper plating baths. This sensor was prepared by using a surface modified glassy carbon (GC) electrode with 1,8-dihydroxyantroquinone (1,8-DHAQ). It was characterized by electrochemical impedance, Raman spectroscopy and UV–Visible spectroscopy. The electrochemical detection of [Cu(CN)3](aq)2−was performed by differential pulse voltammetry. The 1,8-DHAQ/GC electrochemical sensor exhibits good reproducibility and a linear range of 5.50 × 10−7–3.81 × 10−6 mol L−1, with a detection limit (LOD) of 1.20 × 10−6 mol L−1, quantification limit (LOQ) of 3.97 × 10−6 mol L−1, and robustness to interfering Cl, NO3, SO42− y CO32− ions. Finally, a DFT approach suggests an almost parallel orientation of the bis(1,8-dihydroxyanthraquinone) over a graphene domain of the glassy carbon surface, as well as the noncovalent nature of the interactions involved.

Translated title of the contributionSensor electroquímico basado en 1,8-dihidroxiantraquinona adsorbida en un electrodo de carbono vítreo para la detección de [Cu (CN) 3] (aq) 2− en residuos de baños de cianuro alcalino de cobre
Original languageEnglish
Article number114909
JournalJournal of Electroanalytical Chemistry
Volume880
DOIs
StatePublished - 1 Jan 2021
Externally publishedYes

Keywords

  • 1,8-dihydroxyanthraquinone
  • Adsorption
  • Electrochemical sensor
  • Glassy carbon
  • [Cu(CN)]

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