Trimethylamine sensing properties of MoO3 nanofibers

The efficient and reliable monitoring of trimethylamine (TMA) is significant to environmental protection and human healthcare. The Molybdenum trioxide (MoO3) nanofibers can be regarded as a promising sensing material with a low-detection limit for trimethylamine. MoO3 nanofibers with controlled morphology were synthesized by adjusting electrospinning and calcination conditions. MoO3 with the second-step calcination time is 90 s, which shows excellent trimethylamine sensing properties. The response of sensors based on M-90 nanofibers to 50 ppm acetone is 82.3 at 175 °C. And it has excellent selectivity to TMA. The sensors show good selectivity to TMA, compared to other gases to be measured. Finally, a detailed study of the sensing mechanism of MoO3 is conducted to analyze the reasons for exhibiting high response to TMA.