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<p>Rod-shaped microstructures of strontium antimonate (SrSb<sub>2</sub>O<sub>6</sub>) were successfully synthesized by a wet chemistry process and evaluated for their gas sensing capabilities. The material was then calcined at 800&#xa0;°C, and its crystalline phase was analyzed by X-ray diffraction. UV–Vis analysis identified absorption bands characteristic of the trirutile oxide structure, with an optical band gap of 3.84&#xa0;eV (Tauc analysis for an indirect-allowed transition, R<sup>2</sup> = 0.98). Raman spectroscopy identified vibrational modes of the O–Sb and Sr–O bonds, supporting the characterization of the oxide’s crystalline structure. Scanning Electron microscopy and transmission Electron Miscroscopy analyses confirmed the formation of well-defined microrods with average dimensions of ~ 3.19&#xa0;μm in length and ~ 0.34&#xa0;μm in diameter. Gas sensing tests were conducted using SrSb<sub>2</sub>O<sub>6</sub> pellets at different concentrations (ranging from 1 to 300&#xa0;ppm) and operating temperatures (100 to 300&#xa0;°C). The highest sensor response values were ~ 17.22 and ~ 11.10 at 300&#xa0;°C for 300&#xa0;ppm of CO and propane, respectively. The results confirmed the pellets’ good sensitivity and thermal stability. Furthermore, the material’s response was characterized under dynamic conditions using a thick-film configuration, confirming its sensitivity to C<sub>3</sub>H<sub>8</sub> at 450&#xa0;°C and CO at 400&#xa0;°C.</p>

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Synthesis of SrSb2O6 oxide by a wet chemistry process and its ability to sense CO and C3H8 atmospheres

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • Ricardo Gutiérrez-Becerra,
  • Jorge Alberto Ramírez-Ortega,
  • Héctor Guillén-Bonilla,
  • Alex Guillén-Bonilla,
  • José Trinidad Guillén-Bonilla,
  • María de la Luz Olvera-Amador,
  • Verónica-María Rodríguez-Betancourtt

摘要

Rod-shaped microstructures of strontium antimonate (SrSb2O6) were successfully synthesized by a wet chemistry process and evaluated for their gas sensing capabilities. The material was then calcined at 800 °C, and its crystalline phase was analyzed by X-ray diffraction. UV–Vis analysis identified absorption bands characteristic of the trirutile oxide structure, with an optical band gap of 3.84 eV (Tauc analysis for an indirect-allowed transition, R2 = 0.98). Raman spectroscopy identified vibrational modes of the O–Sb and Sr–O bonds, supporting the characterization of the oxide’s crystalline structure. Scanning Electron microscopy and transmission Electron Miscroscopy analyses confirmed the formation of well-defined microrods with average dimensions of ~ 3.19 μm in length and ~ 0.34 μm in diameter. Gas sensing tests were conducted using SrSb2O6 pellets at different concentrations (ranging from 1 to 300 ppm) and operating temperatures (100 to 300 °C). The highest sensor response values were ~ 17.22 and ~ 11.10 at 300 °C for 300 ppm of CO and propane, respectively. The results confirmed the pellets’ good sensitivity and thermal stability. Furthermore, the material’s response was characterized under dynamic conditions using a thick-film configuration, confirming its sensitivity to C3H8 at 450 °C and CO at 400 °C.