High efficiency triethylamine gas sensor based on SmVO4 nano octahedron granules

Abstract

Triethylamine (TEA) is typical hazardous volatile organic gas (VOCs), it is particularly important for us to effectively detect triethylamine in complex places. In this work, high efficiency triethylamine gas sensor based on SmVO4 was successfully obtained by means of hydrothermal reaction and assisted calcination. Characterization of analytical materials, SmVO4 octahedral nanoparticles formed clusters similar to pomegranate fruits. There is a trace +4 valence state of vanadium in the material, which contributes to the oxidation-reduction reaction between the target gas and the surface of the material. Gas sensitive test results found that the SmVO4 sensor still has a 2.45 response to the target gas (triethylamine) at low concentrations (1 ppm). SmVO4 shows excellent selectivity for triethylamine, with a response value more than three times that of other gases. In 25 days, it shows excellent stability and fast response recovery time (15 s/40 s). In addition, the gas sensing mechanism is analyzed.