Hydrothermally synthesized flower-like vanadium oxide nanostructures for ethanol sensing studies

In this study, we synthesized flower-like V2O5 nanostructures via a hydrothermal method. The hydrothermal synthesis was performed at 150 degrees C for 2, 4 and 8 h. After crystallization at 450 degrees C, the crystalline samples were prepared. The synthesized products were characterized by different techniques such as X-ray diffraction, Raman spectroscopy and Fourier transform infrared spectroscopy. Morphology was demonstrated by scanning electron microscopy studies. The gas sensing studies were performed toward different gases. It was found that the sensor prepared for 4 h had better ethanol sensing properties relative to other gas sensors. In particular, it showed a response of similar to 50% to 20 ppm ethanol gas at low temperature of 175 degrees C. The gas sensing mechanisms behind the enhanced gas response of the optimal gas sensor were explained. The results of this study showed promising effects of flower-like morphologies of V2O5 for sensing applications.

Automated summary

In this study, flower-like V2O5 nanostructures were synthesized using a hydrothermal method. The synthesized products were characterized using various techniques and the gas sensing properties of the sensors were evaluated. The results showed that the sensor prepared for 4 hours exhibited better ethanol sensing properties and had a significant response to low levels of ethanol gas at low temperature.