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

• Published in: Materials research innovations Vol. 26; no. 1; pp. 16 - 24
• Main Authors: Kumar J R, Naveen, P, Prasad, M B, Savitha, K S, Lokesh, S, Bharath Kumar, N, Navaneeth Gowda, H V, Rohith
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 02.01.2022
• Subjects: cerium oxide; copper clad; gas sensors; IDE; nanocomposite films; PEI; room temperature
• ISSN: 1432-8917; 1433-075X
• DOI: 10.1080/14328917.2020.1864943

In this effective work, Polyethyleneimine (PEI) and Cerium Oxide (CeO 2 ) with disparate weight percentage were designated for sensing Carbon dioxide (CO 2 ). Four heterogeneous varieties of sensors with a varied weight percentage of CeO 2  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 2  and PEI was critical for sensing response. A feasible comparison between sensing responses of the fabricated sensors to CO 2  under nitrogen (N 2 ) was typically done. Relevant sensing process was investigated too.