Effect of carbon-based nanomaterials on the electrochemical detection of nitrite by cobalt phthalocyanine

Turan G. A., Bekmez M. G., Cesur M., Arslan B. S., Bilgiçli A. T., Günsel A., ...Daha Fazla

Inorganic Chemistry Communications, cilt.181, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 181
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.inoche.2025.115200
  • Dergi Adı: Inorganic Chemistry Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, DIALNET
  • Anahtar Kelimeler: Carbon nanomaterials, Chronoamperometry, Metallophthalocyanine, Nitrite sensor
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

In this work, a comparative study of the electrochemical sensor response of graphene nanoplatelets (GNPs), multi-walled carbon nanotubes (MWCNTs), and single-walled carbon nanotubes (SWCNTs) combined with a tetra-substituted cobalt (II) phthalocyanine bearing 4-(2-amino-5,6-dihydrobenzo[h]quinazolin-4-yl)phenol (CoPc) to nitrite was carried out. For this purpose, the optimal mixtures of CoPc and carbon-based nanomaterials were adsorbed on glassy carbon electrodes (GCEs) by the drop-casting method. Next, as-prepared electrodes were characterized by FT-IR, XPS, UV–vis, FE-SEM, EDX, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). CoPc/SWCNTs electrode exhibits improved electrocatalytic activity for nitrite oxidation compared to CoPc/GNPs and CoPc/MWCNTs electrodes. By using CA technique, CoPc/SWCNTs electrode displayed a low detection limit of 0.038 μM with a sensitivity of 70.16 μA.μM−1 cm−2 in a linear range of 20 to 180 μM. The enhanced electrocatalytic activity can be attributed to the high surface area of SWCNTs. This work provides a comparative approach for nitrite detection, which can be applied to metallophthalocyanine-based sensors for different analytes.