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In this effective work, Polyethyleneimine (PEI) and Cerium Oxide (CeO2) with disparate weight percentage were designated for sensing Carbon dioxide (CO2). Four heterogeneous varieties of sensors with a varied weight percentage of CeO2 in PEI were fabricated by drop-casting the sensitive films on prepared Interdigitated electrodes (IDE) from copper-clad. Morphological, compositional, absorbance and X-ray studies were led on the cerium oxide nanoparticles by field-emission scanning electron microscopy (FESEM), energy dispersive X-ray analysis (EDAX), UV-Visible spectrometer and X-ray diffractometer (XRD). Response capabilities of all the four sensors at room temperature were attentively scrutinized. Unique capabilities of Repeatability, sensitivity, error-free measurements of the response time and recovery time were carefully inspected. It was summarized that the appropriate weight ratio of CeO2 and PEI was critical for sensing response. A feasible comparison between sensing responses of the fabricated sensors to CO2 under nitrogen (N2) was typically done. Relevant sensing process was investigated too. [ABSTRACT FROM AUTHOR]

In the present investigation, the response capabilities of the sensors fabricated by the drop-casting process were examined at room temperature. Polyethyleneimine (PEI) and synthesised reduced graphene oxide (RGO) with varied weight percentage are the materials selected for sensing Carbon dioxide (CO2). The novelty of the present work resembles the preparation of interdigitated electrodes (IDE) from patterning the copper clad. Four different varieties of sensors with a varied weight percentage of RGO in PEI were fabricated by drop-casting the sensitive films on prepared IDE. Capabilities of resistance over CO2 concentration, sensitivity, repeatability, measurements of response and recovery time were examined. It was found that appropriate weight ratio of RGO and PEI was critical for sensing response. A comparison between sensing responses of the fabricated sensors to CO2 under nitrogen (N2) was done. Addition to that appropriate sensing process was also analysed. [ABSTRACT FROM AUTHOR]