Sensors (Jan 2016)

A Novel Gas Sensor Based on MgSb2O6 Nanorods to Indicate Variations in Carbon Monoxide and Propane Concentrations

  • Héctor Guillén-Bonilla,
  • Martín Flores-Martínez,
  • Verónica-María Rodríguez-Betancourtt,
  • Alex Guillen-Bonilla,
  • Juan Reyes-Gómez,
  • Lorenzo Gildo-Ortiz,
  • María de la Luz Olvera Amador,
  • Jaime Santoyo-Salazar

DOI
https://doi.org/10.3390/s16020177
Journal volume & issue
Vol. 16, no. 2
p. 177

Abstract

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Bystromite (MgSb2O6) nanorods were prepared using a colloidal method in the presence of ethylenediamine, after a calcination step at 800 °C in static air. From X-ray powder diffraction analyses, a trirutile-type structure with lattice parameters a = 4.64 Å and c = 9.25 Å and space group P42/mnm was identified. Using scanning electron microscopy (SEM), microrods with sizes from 0.2 to 1.6 μm were observed. Transmission electron microscopy (TEM) analyses revealed that the nanorods had a length of ~86 nm and a diameter ~23.8 nm. The gas-sensing properties of these nanostructures were tested using pellets elaborated with powders of the MgSb2O6 oxide (calcined at 800 °C) at temperatures 23, 150, 200, 250 and 300 °C. The pellets were exposed to different concentrations of carbon monoxide (CO) and propane (C3H8) at these temperatures. The results showed that the MgSb2O6 nanorods possess excellent stability and high sensitivity in these atmospheres.

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