Abstract
Cerium-doped tricobalt tetroxide (Ce-Co3O4) has been successfully synthesized via a simple hydrothermal route. The structural, morphological, and elemental compositions of prepared samples with their corresponding chemical states were analyzed by employing X-ray diffraction (XRD), field emission scanning microscopy (FE-SEM), and X-ray photoelectron spectroscopy (XPS) respectively. The gas sensing measurement of the prepared samples reveals the superior gas sensing performance of 1 at.% Ce-doped Co3O4 microflowers with an excellent response of 35% toward 50 ppm of NO2 at near room temperature of 50 ℃. The proposed sensor exhibits outstanding stability of 99% over a period of a month. The repeatability of the sensor for five consecutive cycles reveals the ability of the proposed sensor for the potential NO2 sensing application. Moreover, the limit of detection (LoD) of the sensor is found to be as low as 4500 ppb. The reason behind the enhanced sensing performance of the fabricated sensor and the possible mechanism has been discussed in the present study.
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Acknowledgements
The authors thank the management of SRM Institute of Science and Technology for the support through SEED, STARTUP grant and Nanotechnology Research Centre (NRC) for the research facilities. Dr. M. Navaneethan thanks the management of SRM Institute of Science and Technology for the financial support through Selective Excellence Research Initiative (SERI).
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Pavithra Murugesh: Conceptualization, investigation, writing-original draft. Ponnusamy Suruttaiya Udaiyar: Validation, formal analysis and resources. Navaneethan Mani: Supervision, resources and writing-review and editing. All authors have read and agreed to the published version of the manuscript.
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Murugesh, P., Suruttaiya Udaiyar, P. & Mani, N. Design of Ce incorporated tricobalt tetroxide Co3O4 sensor with boosted gas sensing performance toward nitrogen dioxide. J Mater Sci: Mater Electron 35, 1010 (2024). https://doi.org/10.1007/s10854-024-12681-7
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DOI: https://doi.org/10.1007/s10854-024-12681-7