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Humidity sensing behaviour of Rubidium-doped Magnesium ferrite for sensor applications

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Abstract

In the present work, the influence of Rb3+ on the structural, microstructure, and humidity sensing properties of MgxRb1−xFe2O4 (x = 0.025 to 0.1) is reported. Samples were prepared by the self-propagating high temperature synthesis method. Structure is analogized through X-ray powder diffraction (XRD); microstructural and elemental composition via; Scanning Electron Microscopy (SEM) and Energy dispersive spectra (EDS), respectively. XRD patterns of all samples reveal the spinel cubic structure with single phase formation. The lattice parameters were found to decrease with an increase in Rb3+ concentration. Further estimated crystallite sizes were found in the nano range. Further estimated crystallite size range was found to be between 25 to 40 nm range. Changes in the distribution of grain and the rise in intergranular pores in the composite for adsorption of water are verified by electron SEM images. EDS was utilized to examine the elemental compositions of the prepared samples. Fourier Transform infrared Spectroscopy spectra shows two absorption bands, the high frequency band has a frequency range of 560–600 cm−1, whereas the low frequency band has a frequency range of 380–420 cm−1 which confirms the formation of spinel cubic structure. Mg0.9Rb0.1Fe2O4 displays a good sensing response. The composite response and recovery durations for Mg0.9Rb0.1Fe2O4 were 20 and 30 s, respectively. Chemisorption, physisorption, and capillary condensation methods were used to investigate the sensing process. For humidity, Mg0.9Rb0.1Fe2O4 samples showed steady sensing abilities and minimal hysteresis. Rb is a key component in boosting the humidity sensing effectiveness of Mg ferrite, making the composite ideal for use in humidity sensor devices.

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Data availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request. The data that support the findings of this study are not openly available due to unpublished this work anywhere and are available from the corresponding author upon reasonable request.

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Acknowledgements

The Research Center for Advanced Materials Science (RCAMS)” at King Khalid University, Saudi Arabia, for funding this work under the Grant Number KKU/RCAMS/G012-21. Also, the authors extend their appreciation to the Deputyship for Research & Innovation, Ministry of Education, in Saudi Arabia, for funding this research work through the project number: (IFP-KKU-2020/9).

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Authors and Affiliations

  1. Department of Physics, Karanataka Science College, Karanatak University, Dharwad, 580003, India

    Veeresh G. Hiremath & G. H. Malimath

  2. Deparment of Physics, P.C.Jabin Science College, Hubballi, Karnataka, 580031, India

    Veeresh G. Hiremath & V. Jagadeesha Angadi

  3. Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia

    I. S. Yahia & H. Y. Zahran

  4. Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia

    I. S. Yahia & H. Y. Zahran

  5. Nanoscience Laboratory for Environmental and Biomedical Applications (NLEBA), Semiconductor Lab., Metallurgical Lab.1, Department of Physics, Faculty of Education, Ain Shams University, Roxy, 11757, Cairo, Egypt

    I. S. Yahia & H. Y. Zahran

  6. Department of Physics, Indian Institute of Science, Bangalore, 560012, India

    B. Chethan

  7. Department of PG Studies and Research in Physics, Government Science College, Chitradurga, Karnataka, 577 501, India

    Y. T. Ravikiran

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  1. Veeresh G. Hiremath
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  2. I. S. Yahia
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  3. H. Y. Zahran
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  4. B. Chethan
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  7. V. Jagadeesha Angadi
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Contributions

VGH: Conceptualization, Methodology, Software and writing. ISY: revision of Data curation, Writing-Original draft preparation, HYZ: revision Analysis of Humidity Sensing data. CB: Analysis and Humidity sensing measurement. GHM: Reviewing manuscript. YTR: Measurements of Humidity sensing. VJA: Conceptualization, Reviewing and Editing.

Corresponding author

Correspondence to V. Jagadeesha Angadi.

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Hiremath, V.G., Yahia, I.S., Zahran, H.Y. et al. Humidity sensing behaviour of Rubidium-doped Magnesium ferrite for sensor applications. J Mater Sci: Mater Electron 33, 11591–11600 (2022). https://doi.org/10.1007/s10854-022-08131-x

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  • DOI: https://doi.org/10.1007/s10854-022-08131-x

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