Biogenesis of Prism-Like Silver Oxide Nanoparticles Using Nappa Cabbage Extract and Their p-Nitrophenol Sensing Activity

The present study aimed to explore the eco-friendly synthesis of prism-like silver oxide nanoparticles (Ag(2)ONPs) from nappa cabbage extract and its p-nitrophenol sensing activity. The prepared Ag(2)ONPs were characterized by X-ray diffraction (XRD), field-emission scanning spectroscopy (FESEM), energy-dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and ultraviolet (UV)–visible light spectral analysis (UV–Vis). p-Nitrophenol sensing properties of the prepared nanoparticles were also determined using a simple I–V method. The results showed that the as-prepared Ag(2)ONPs have a face-centered cubic (fcc) crystalline nature and a prism-like morphology with particle size in the range 21.61–92.26 nm. The result also showed a high intensity of the (111) facet, making the Ag(2)ONP–carbon black/nickel foam electrode (Ag(2)ONP–C/NFE) exhibit a high-performance response to p-nitrophenol spanning a wide range of concentrations from 1.0 mM to 0.1 pM and a response time of around 5 s, indicating a high potential for water treatment applications.