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<p>In this study, Ba<sub>2</sub>SnO<sub>4</sub> nanostructures were successfully synthesized via the hydrothermal method and employed for gas sensing applications. Two samples were prepared with and without the use of a surfactant in order to investigate its influence on the structural, morphological, optical characteristics and gas sensing performance of Ba<sub>2</sub>SnO<sub>4</sub> nanostructures. The obtained powders were processed into thick films using the screen-printing technique. Comprehensive characterization was carried out using X-ray diffraction (XRD), UV–Visible spectroscopy, scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM–EDS), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric /differential thermal analysis (TGA/DTA), Raman spectroscopy, and electrical measurements. The gas sensing performance of the synthesized Ba<sub>2</sub>SnO<sub>4</sub> thick films was evaluated toward NO<sub>2</sub>, NH<sub>3</sub>, LPG, H<sub>2</sub>S, ethanol, and methanol gases. Among them, NO<sub>2</sub> exhibited the highest response. Sample S1 showed a maximum sensitivity of 68.74% at 160&#xa0;°C for 1000 ppm NO<sub>2</sub>, whereas Sample S2 demonstrated enhanced performance with 82.13% sensitivity at a lower temperature of 120&#xa0;°C and 600 ppm NO<sub>2</sub> concentration. The limits of detection (LOD) were determined to be 152.97 ppm for S1 and 705.72 ppm for S2, respectively. Both samples displayed fast response and recovery times, along with good selectivity, stability, and reusability, confirming the potential of Ba<sub>2</sub>SnO<sub>4</sub> thick films particularly the CTAB-assisted sample as promising candidates for efficient NO<sub>2</sub> gas sensors.</p>

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CTAB-assisted hydrothermal synthesis of Ba2SnO4 nanostructures for enhanced NO2 gas sensing performance

  • 期刊论文

  • 发表日期：

    2026年1月27日

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  • Sagar H. Mane,
  • Tushar S. Wagh,
  • Abhaysinh S. Khune,
  • Manohar K. Zate,
  • Madhavrao K. Deore,
  • Ganesh J. Mogal

摘要

In this study, Ba2SnO4 nanostructures were successfully synthesized via the hydrothermal method and employed for gas sensing applications. Two samples were prepared with and without the use of a surfactant in order to investigate its influence on the structural, morphological, optical characteristics and gas sensing performance of Ba2SnO4 nanostructures. The obtained powders were processed into thick films using the screen-printing technique. Comprehensive characterization was carried out using X-ray diffraction (XRD), UV–Visible spectroscopy, scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM–EDS), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric /differential thermal analysis (TGA/DTA), Raman spectroscopy, and electrical measurements. The gas sensing performance of the synthesized Ba2SnO4 thick films was evaluated toward NO2, NH3, LPG, H2S, ethanol, and methanol gases. Among them, NO2 exhibited the highest response. Sample S1 showed a maximum sensitivity of 68.74% at 160 °C for 1000 ppm NO2, whereas Sample S2 demonstrated enhanced performance with 82.13% sensitivity at a lower temperature of 120 °C and 600 ppm NO2 concentration. The limits of detection (LOD) were determined to be 152.97 ppm for S1 and 705.72 ppm for S2, respectively. Both samples displayed fast response and recovery times, along with good selectivity, stability, and reusability, confirming the potential of Ba2SnO4 thick films particularly the CTAB-assisted sample as promising candidates for efficient NO2 gas sensors.