Abstract
In this study, hydrothermal method was used to synthesized Ni-doped In2O3 microcubes. XRD, Raman, XPS, and UV–Vis spectroscopy were used to examine additional structural, chemical, morphological, and optical characteristics of In2O3 and Ni-doped In2O3. In addition, the gas sensing measurement of synthesized material was also carried out. It was observed that the Ni-In7 sensor responds to 1 ppm NO2 with the greatest sensor response (Rg/Ra=6.46) and fastest response/ recovery time (30/120s) at 120 °C operating temperature which is 6 times greater than the Ni-In0 sensor. Furthermore, Ni-In7 displayed good stability in addition to its outstanding selectivity towards NO2. A high oxygen vacancy concentration gives more electrons to enhance NO2 activation. Additionally, the incorporation of Ni into the In2O3 structure contributes to the material's large surface area.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors would like to express their gratitude to Dr. Niranjan Ramgir at the technical physics division of the Bhabha Atomic Research centre in Mumbai, Maharashtra, India for XPS characterization. Also, the authors would like to thank Science and Engineering Research Board (SERB)’s core research grant (CRG/2019/004990) gave financial assistance for this project.
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SH: This study’s conceptualization, methodology, formal analysis, writing - first copy, and investigation. SJ: Project management, Conceptualization, Methodology, Supervision, Writing - Review and Editing.
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Hambir, S., Jagtap, S. NO2 sensing behavior of Ni-doped In2O3 microcubes based chemiresistive gas sensors. J Mater Sci: Mater Electron 34, 1716 (2023). https://doi.org/10.1007/s10854-023-11147-6
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DOI: https://doi.org/10.1007/s10854-023-11147-6