Performers of Si3N4 Concentrations on Morphology and Electrical Behavior for New Quinary Fabrication PEO-CMC-PANI/GO@Si3N4 Nanocomposites for Electronic Devise and Gas Sensor Application

Abstract

Gas sensors are critical topics, attracting scientists and industries for their ability to work in different environments for safety and environmental monitoring applications. The impact of various concentrations of silicon nitride (Si₃N_4[Y%]) (Y = 0.2, 2.2, and 4.2%) compact with synthesis graphene oxide (GO_[0.8%]) as (GO_[0.8%]@Si₃N_4[Y%]) hybrid nanomaterials loaded into newly ternary blend polyethylene oxide, carboxymethyl cellulose, and nano polyaniline (PEO_[60%]-CMC_[30%] -PANI_[x%]) to fabricated newly nanocomposites for nanochemical NO₂ gas sensor. Sol–gel and ultrasonic mixing methods were used to make nanocomposites, which were then dried out on glass slides using thermal evaporation to characterize the sensors. Images from field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) showed that the shape and porosity of the surface changed a lot. These changes, along with the attachment of nanomaterials, are key to how well it can sense gases. The Fourier-transform infrared spectroscopy (FTIR) spectra showed that the sample components had strong physical and network interactions. X-ray diffraction (XRD) indicated a semi-crystalline behavior in all samples. Dialectical constant and loss were reduced, whereas AC electrical conductivity improved with the increase in the content of Si3N4. The gas sensor ran at three temperatures (RT, 100 °C, and 200 °C). All of the nanofilm sensors behaved like p-type semiconductors, and when the oxidized gas NO₂ was turned on, the electrical resistance went down. The best sensitivity to NO₂ was (6.89%) at RT, with a response time of (16 s) and a recovery time of (19 s) for a loading ratio of 3 wt.% hybrid nanomaterials. The study provides an excellent nanochemical gas sensor for NO₂ gas for manufacturing applications.