Rod-Like MnMoO₄ with Excellent Electrochemical Performance as Sensing Material to Detect Triethylamine

Abstract

MnMoO4 has excellent electrochemical properties and is widely used in the field of electrochemistry. In this study, MnMoO4 with rod-like structure was successfully prepared by simple solvothermal method and used as sensitive material for gas sensors. The gas sensing performance shows that the response of MnMoO4-based sensor to 50 ppm triethylamine is 224.2, which is 2.3 times higher than that of pure MoO3. That reason why MnMoO4 exhibits better sensitivity is that the increase of oxygen vacancy content gives the surface of MnMoO4 material abundant active sites. In addition, its large baseline resistance is also conducive to the improvement of gas sensitivity. These factors make the MnMoO4-based sensor exhibit high response to triethylamine. What’s more, the sensor also has excellent selectivity, satisfactory repeatability, and long-term stability to triethylamine under chemical sensitization and synergistic action. This work provides a new thinking for the application of MnMoO4 in gas sensors.