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<p>The present research investigation highlights that the structural characteristics and sensing applications of LaCoO<sub>3</sub> are modified by the presence of Sn at various concentrations. In this research work, LaCoO<sub>3</sub> nanostructures have been modified using varying concentrations of Tin in molar percentages, specifically 0.1, 0.3, 0.5, and 0.7&#xa0;M%. The hydrothermal technique is used to fabricate pristine and Sn-doped lanthanum cobaltite materials, and then a conventional screen-printing technique is used to prepare thick films. The X-ray diffractometer (XRD) was utilized to confirm the structural features of Sn-doped LaCoO<sub>3</sub>. Ultraviolet–visible absorption spectroscopy (UV–Visible) was used to study the optical properties and band gap. The fabricated material’s surface properties and morphological features were examined through scanning electron microscopy (SEM), while the composition of chemical material was identified by employing Energy-dispersive spectroscopy (EDS). The lattice structure and morphology of Sn-doped LaCoO<sub>3</sub> nanostructure were confirmed to be rhombohedral by transmission electron microscopy (TEM), and the M–O bonding vibrational stretching frequencies were investigated with Fourier-transform infrared (FT-IR) spectroscopy. The efficiency of the fabricated materials as a gas sensor for several pollutants, like CO, H<sub>2</sub>S, NO<sub>2</sub>, NH<sub>3</sub>, SO<sub>2</sub>, CO<sub>2</sub>, and petrol vapors, was examined. The sensor highlights the sensitivity for CO<sub>2</sub> gas at 200&#xa0;℃ for 0.3&#xa0;M% Sn-doped LaCoO<sub>3</sub>. Furthermore, a remarkable 0.5&#xa0;M% Sn-doped LaCoO<sub>3</sub> sensor demonstrated superior response for NH<sub>3</sub> at 150 ℃ and NO<sub>2</sub> at 250&#xa0;℃. The stability of the 0.3&#xa0;M% and 0.5&#xa0;M% Sn-LaCoO<sub>3</sub> sensors were confirmed by the reproducibility as well as the quick response as well as recovery time were measured for sensors, which were Sn-doped LaCoO<sub>3</sub> with a concentration of 0.3&#xa0;M% and 0.5&#xa0;M%.</p>

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Insights into a low-temperature gas sensing performance of hydrothermally fabricated novel Sn-modified LaCoO3 nanostructures

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Rohini G. Borse,
  • Sachin M. Ingole,
  • Sharad S. Gaikwad,
  • Vrushali S. Shinde,
  • Ghanshyam R. Jadhav,
  • Akanksha C. Gurule,
  • Ganesh B. Dabhade,
  • Suresh Ghotekar

摘要

The present research investigation highlights that the structural characteristics and sensing applications of LaCoO3 are modified by the presence of Sn at various concentrations. In this research work, LaCoO3 nanostructures have been modified using varying concentrations of Tin in molar percentages, specifically 0.1, 0.3, 0.5, and 0.7 M%. The hydrothermal technique is used to fabricate pristine and Sn-doped lanthanum cobaltite materials, and then a conventional screen-printing technique is used to prepare thick films. The X-ray diffractometer (XRD) was utilized to confirm the structural features of Sn-doped LaCoO3. Ultraviolet–visible absorption spectroscopy (UV–Visible) was used to study the optical properties and band gap. The fabricated material’s surface properties and morphological features were examined through scanning electron microscopy (SEM), while the composition of chemical material was identified by employing Energy-dispersive spectroscopy (EDS). The lattice structure and morphology of Sn-doped LaCoO3 nanostructure were confirmed to be rhombohedral by transmission electron microscopy (TEM), and the M–O bonding vibrational stretching frequencies were investigated with Fourier-transform infrared (FT-IR) spectroscopy. The efficiency of the fabricated materials as a gas sensor for several pollutants, like CO, H2S, NO2, NH3, SO2, CO2, and petrol vapors, was examined. The sensor highlights the sensitivity for CO2 gas at 200 ℃ for 0.3 M% Sn-doped LaCoO3. Furthermore, a remarkable 0.5 M% Sn-doped LaCoO3 sensor demonstrated superior response for NH3 at 150 ℃ and NO2 at 250 ℃. The stability of the 0.3 M% and 0.5 M% Sn-LaCoO3 sensors were confirmed by the reproducibility as well as the quick response as well as recovery time were measured for sensors, which were Sn-doped LaCoO3 with a concentration of 0.3 M% and 0.5 M%.