Ag nanoparticles-decorated CuBi2O4-rGO electrodes as an amperometric sensor for electrochemical determination of nitrite

ÖZTÜRK DOĞAN H., Albayrak Ö. F.

Synthetic Metals, cilt.298, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 298
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.synthmet.2023.117445
  • Dergi Adı: Synthetic Metals
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Ag NPs, Copper bismuthate, Electrochemical detection, Nitrite sensor, Reduced graphene oxide
  • Atatürk Üniversitesi Adresli: Evet

Özet

There is an increasing demand for developing more sensitive sensors for determining nitrite, which has potential use in wastewater, food preservatives, and corrosion inhibitors. Here, we designed a CuBi2O4/rGO nanocomposite via simultaneous electrochemical deposition of GO and CuBi2O4. Then, the nanocomposite surface was electrochemically functionalized with Ag nanoparticles. Analytical and morphological characterizations showed that nanocomposites were synthesized with high purity and crystallinity. Finally, the electrocatalytic activity of the prepared Ag@CuBi2O4/rGO electrode was investigated as an electrochemical sensor application in nitrite detection. Ag@CuBi2O4/rGO had a higher faradaic current than CuBi2O4/rGO and PGE. The modified electrode exhibited high selectivity with low nitrite oxidation potential (+ 0.8 V) and detection limit (0.18 µM). The detection limit for nitrite is lower than that of most reported materials.