Volume 15, Issue 6

Biogenic Synthesis of AgO Nanoparticles Using Thunbergia erecta Leaf Extract: Characterization and Enhanced H2S Gas Sensing Performance

Author

Sonali. P. Nikam, Sachin. S. Kushare, Ujjan. B. Kadam

Abstract

The current study used Thunbergia erecta leaf extract as a reducing and stabilising agent to biogenically synthesise silver oxide (AgO) nanoparticles in an economical and environmentally friendly manner. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR) were used to systematically characterise the synthesised nanoparticles in order to verify their crystalline nature, morphology, elemental composition, and surface functional groups. The creation of well-crystalline, quasi-spherical AgO nanoparticles with uniform distribution and nanoscale dimensions was demonstrated by the results. The produced AgO nanoparticles' ability to detect different gases, such as H2S, CO, CO2, NH3 and H2, was examined. Among these, the sensor showed outstanding selectivity and sensitivity in reaction to hydrogen sulphide (H2S). The sensor reached a maximum sensitivity of 120.21 toward H2S gas at a particular concentration at the ideal operating temperature of 100 °C. The high surface-to-volume ratio, enhanced adsorption capacity, and the presence of active surface sites made possible by phytochemical residues from the plant extract are all responsible for the improved sensing performance. The produced AgO nanoparticles are a potential option for effective H2S gas detection in industrial safety and environmental monitoring applications due to their superior sensing properties, low working temperature, and green manufacturing method.

Keywords: AgO nanoparticles; Green synthesis; Thunbergia erecta; Biogenic synthesis; Gas sensor; H2S detection; Sensitivity; Low operating temperature.

DOI: https://doi.org/10.62226/ijarst20262707

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DOI

https://doi.org/10.62226/ijarst20262707

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