ROMJIST Volume 29, No. 2, 2026, pp. 133-142, DOI: 10.59277/ROMJIST.2026.2.03
Sabrina STATE, Daniel NEGREANU, Stefan ROSU, Oana BRINCOVEANU, Livia Alexandra DINU, Cristina PACHIU, Cosmin ROMANITAN, Martino ALDRIGO Electrochemical Synthesis of Silver Nanostructures-Carbon based Composites from Deep Eutectic Solvents for Bisphenol A Detection
ABSTRACT: Bisphenol A (BPA) is widely used in plastic manufacturing and is known to have adverse effects on both human health and the environment. Among the available analytical approaches for BPA detection, electrochemical sensors represent a promising alternative due to their sensitivity, simplicity, and low cost. In this study, we report the electrochemical synthesis of silver nanostructures–carbon-based composites involving green electrolytes, namely deep eutectic solvents (DESs). Single-walled carbon nanotubes (SWCNTs) and graphene oxide (GO) were employed as carbon nanomaterials. The influence of the carbon nanostructure type and electrochemical synthesis parameters (pulse duration, frequency, duty cycle) on the morphology of the samples was discussed. A wide range of silver morphologies was obtained, from spherical nanoparticles to cubic structures. The composites were characterized by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM–EDX), Raman spectroscopy, atomic force microscopy (AFM), and X-ray diffraction (XRD). The nanocomposite material was drop-casted on a screen-printed carbon electrode (SPCE) for the development of an environmental sensing device for the endocrine disruptor BPA. The AgNPs–GO/SPCE sensor exhibited a calculated limit of detection (LOD) of 0.46 μM and a sensitivity of 0.01 A mol−1 L−1, with a wide linear concentration range of 1 × 10−7 to 8 × 10−4 M for BPA detection.KEYWORDS: Bisphenol A; deep eutectic solvents; electrochemical sensor; pulse reverse current electrodeposition; silver nanostructures-carbon composites.Read full text (pdf)