Fabrication of a novel potentiometric sensor based on graphite/carbon nanotube composite paste modified by lead(II)sulfide for efficient determination of copper(II) ions

Ogul G., ÇOLDUR F., Cubuk O.

Chemical Papers, cilt.78, sa.16, ss.8719-8729, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 78 Sayı: 16
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1007/s11696-024-03703-z
  • Dergi Adı: Chemical Papers
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core
  • Sayfa Sayıları: ss.8719-8729
  • Anahtar Kelimeler: All-solid-state electrode, Carbon paste electrode, Copper(II) determination, Lead(II) sulfide, Potentiometric determination, Potentiometric titration
  • Erzincan Binali Yıldırım Üniversitesi Adresli: Evet

Özet

A simple fabrication route for an all-solid-state carbon paste Cu(II)-selective potentiometric sensor on the basis of composite sensing layer consisting of PbS microparticles, graphite (G), multi-walled carbon nanotube, and paraffin oil has been propounded. Optimization studies for sensing composite layer signified that the composite contained 10 mg PbS, 10 mg MWCNT, 60 mg G, and 20 mg PO exposed the most promising potentiometric performance properties. The sensor displayed a stable and selective linear response to Cu(II) ions in the concentration range of 1.0 × 10−6–1.0 × 10−2 M (R2 = 0.9992) with an average potential change of 30.2 mV/decade. Detection limit, response time, and life-span of the sensor were determined as 5.0 × 10−7 M, 15 s, and 3 weeks, respectively. The fabricated sensor was successfully used in practical applications, serving as an indicator electrode to determine the end-point of Cu(II) titrations and to measure Cu(II) content in Cu(II)-spiked tap water samples. Graphical abstract: (Figure presented.)