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<p>The synthesis of MnSb<sub>2</sub>O<sub>6</sub> powders was carried out using a wet chemical process assisted by microwave radiation. The powder of the compound-calcined at 800 °C was analyzed by X-ray diffraction and showed that the crystal structure of MnSb<sub>2</sub>O<sub>6</sub> is hexagonal. Studies carried out using ultraviolet-visible spectroscopy revealed a band gap of ~ 1.79&#xa0;eV. SEM micrographs showed particle agglomeration and the growth of microplates, microrods, microspheres, and other particles with no apparent shape. TEM studies confirmed the growth of nanorods and microplates. Sensors fabricated with MnSb<sub>2</sub>O<sub>6</sub> exhibited an excellent dynamic response by registering changes in electrical resistance over time in isopropanol vapors. The sensor demonstrated ability, repeatability, efficiency, and a good sensitivity as the concentrations increased (5 to 200 ppm). The maximum response obtained was estimated at 23.2 at an isopropanol concentration of 200 ppm, while the sensor detection limit was calculated at 0.65, corresponding to 5 ppm of the same vapor. The response times for the different isopropanol contraction times were estimated at 28.9, 30.0, 32.0, 34.0, 28.7, 29.8 and 30.6&#xa0;s, and the recovery times were calculated at 111.0, 120.8, 113.2, 105.9, 128.3, 133.4 and 129.7&#xa0;s. Meanwhile, the sensitivity obtained for the dynamic response performed in cycles was 1.76, while the response and recovery times were calculated at 30&#xa0;s and 120.8&#xa0;s. Furthermore, it was confirmed that increasing isopropanol concentrations significantly enhance the response. These results suggest that MnSb<sub>2</sub>O<sub>6</sub> is a good candidate for application as a sensor for organic vapors, particularly isopropanol.</p>

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Alcohol detection properties of a sensor based on MnSb2O6 powders

  • 期刊论文

  • 发表日期：

    2025年5月9日

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  • Alex Guillén-Bonilla,
  • Juan Pablo Morán-Lázaro,
  • José Trinidad Guillén-Bonilla,
  • Emilio Huízar-Padilla,
  • Antonio Casillas-Zamora,
  • Héctor Guillén-Bonilla

摘要

The synthesis of MnSb2O6 powders was carried out using a wet chemical process assisted by microwave radiation. The powder of the compound-calcined at 800 °C was analyzed by X-ray diffraction and showed that the crystal structure of MnSb2O6 is hexagonal. Studies carried out using ultraviolet-visible spectroscopy revealed a band gap of ~ 1.79 eV. SEM micrographs showed particle agglomeration and the growth of microplates, microrods, microspheres, and other particles with no apparent shape. TEM studies confirmed the growth of nanorods and microplates. Sensors fabricated with MnSb2O6 exhibited an excellent dynamic response by registering changes in electrical resistance over time in isopropanol vapors. The sensor demonstrated ability, repeatability, efficiency, and a good sensitivity as the concentrations increased (5 to 200 ppm). The maximum response obtained was estimated at 23.2 at an isopropanol concentration of 200 ppm, while the sensor detection limit was calculated at 0.65, corresponding to 5 ppm of the same vapor. The response times for the different isopropanol contraction times were estimated at 28.9, 30.0, 32.0, 34.0, 28.7, 29.8 and 30.6 s, and the recovery times were calculated at 111.0, 120.8, 113.2, 105.9, 128.3, 133.4 and 129.7 s. Meanwhile, the sensitivity obtained for the dynamic response performed in cycles was 1.76, while the response and recovery times were calculated at 30 s and 120.8 s. Furthermore, it was confirmed that increasing isopropanol concentrations significantly enhance the response. These results suggest that MnSb2O6 is a good candidate for application as a sensor for organic vapors, particularly isopropanol.