Amine gases have become essential indicators for assessing seafood spoilage, with triethylamine (TEA) standing out due to its close association with the decay process. Effective detection of TEA in complex environments is therefore crucial. However, current TEA sensors often suffer from limitations such as low sensitivity, poor selectivity, or the need for high operating temperatures. In this work, a highly efficient TEA gas sensor which based on MoV 2 O 8 was successfully fabricated through hydrothermal reaction and assisted calcination. Gas sensing tests demonstrated a response of 2.63 towards 100 ppm TEA at the optimal working temperature of 160 ℃, exhibited good linearity at low TEA concentrations. Additionally, experimental results confirmed that the sensor possesses excellent selectivity, reproducibility, and stability. The gas sensing mechanism was further analyzed in depth. Finally, a TEA detection device based on MoV 2 O 8 was designed to detect TEA emissions from decayed marine fish.
MoV 2 O 8 micro-cuboids were environment-friendly prepared via a facile one-step solvothermal route followed by thermal treatment with vanadium pentoxide and ammonium molybdate as raw materials without using harmful solvents or surfactants. Characterization by XRD, FTIR, XPS, SEM and TEM showed that MoV 2 O 8 formed a layered structure by the stacking of nanosheets and assumed a micro-cuboid shape with a thickness of 150∓30 nm, a width of 350∓110 nm and a length of 680∓18 nm. For the first time, the catalytic properties of MoV 2 O 8 micro-cuboids were investigated for the gas-phase ammoxidation of p -chlorotoluene (PCT) to p -chlorobenzonitrile (PCBN). The as-prepared catalyst exhibited high activity and selectivity in the ammoxidation of PCT to PCBN, with a near 100% conversion and 83.6% yield.
Graphical abstract
危险品化学品经营许可证（带存储）