CO2 detection: using the polyethyleneimine–cerium oxide nanocomposite sensing film coated on interdigitated electrode prepared from copper clad

Abstract

In this effective work, Polyethyleneimine (PEI) and Cerium Oxide (CeO<inf>2</inf>) with disparate weight percentage were designated for sensing Carbon dioxide (CO<inf>2</inf>). Four heterogeneous varieties of sensors with a varied weight percentage of CeO<inf>2</inf> 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 CeO<inf>2</inf> and PEI was critical for sensing response. A feasible comparison between sensing responses of the fabricated sensors to CO<inf>2</inf> under nitrogen (N<inf>2</inf>) was typically done. Relevant sensing process was investigated too. © 2020 Informa UK Limited, trading as Taylor & Francis Group.