In situ growth of lanthanum selenides over graphene oxide sheets as electrocatalyst towards non-enzymatic dual detection of dopamine and ascorbic acid
Journal of Rare Earths, cilt.44, sa.6, ss.1791-1801, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 44 Sayı: 6
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.jre.2025.06.022
- Dergi Adı: Journal of Rare Earths
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
- Sayfa Sayıları: ss.1791-1801
- Anahtar Kelimeler: Biosensing, Electrocatalyst, Graphene nanocomposite, Metal selenide, Rare earth
- Süleyman Demirel Üniversitesi Adresli: Evet
Özet
This study presents the hydrothermal synthesis of a novel lanthanum selenide decorated graphene oxide (LaSe@GO) nanocomposite utilized as electrocatalyst for the non-enzymatic electrochemical sensing of dopamine (DA) and ascorbic acid (AA). The morphological features, chemical and structural composition of the nanocomposite were characterized using a suite of analytical techniques including scanning electron microscopy (SEM), energy dispersive X-ray electron microscopy (EDX) and X-ray diffraction (XRD) pattern. LaSe@GO modified electrode exhibits exceptional dual sensing performance, achieving low detection limits of 0.04 mmol/L for DA and 0.1 mmol/L for AA and excellent selectivity against common interferents (e.g., glucose, uric acid and sodium chloride). The sensor demonstrates high sensitivity of 0.55 and 0.25 mA/(mmol/(L·cm2)) and broader linear ranges of 0.1–1.3 and 0.2–1.9 mmol/L for the DA and AA, respectively. Boosted performance of the synthesized nanocomposite is associated with the synergistic impact of active sites and enlarged surface area provided by the LaSe nanoparticles and GO sheets, respectively. This work may pave the new perspective for the development in electrochemical sensors in term of innovative rare earth metal-based carbon nanocomposites.