Investigation of Ammonia-Sensing Characteristics of Electrospun Fe2O3 Nanograins

Fe2O3 nanofibers were prepared using iron ( II) chloride anhydrous and polyvinyl alcohol (PVA) by a simple electrospinning technique on a glass substrate. The deposited Fe2O3-based nanofibers were vacuum-annealed at 50 degrees C for 35 min and calcinated at 450 degrees C for 12 h to obtain Fe2O3 nanograins. which were characterized by XRD, SEM, XPS, and FTIR. The XRD result shows the polycrystalline nature of Fe2O3. Also, from TEM analysis, we can observe that the Fe2O3 nanograins formed along the axis of nanofibers. This continuous arrangement of nanograins along the axis is a promising structure for gas-sensing applications. The calcined Fe2O3 nanograins showed a better response towards ammonia at 300 degrees C. They also showed a quick response (14 s) and recovery (23 s) towards 5 ppm of ammonia vapor. [GRAPHICS] .

Automated summary

Fe2O3 nanofibers were prepared using iron (II) chloride anhydrous and polyvinyl alcohol (PVA) via electrospinning technique. The resulting Fe2O3 nanograins showed a polycrystalline nature and were aligned along the axis of the nanofibers. This continuous arrangement of nanograins exhibited promising gas-sensing capabilities, particularly towards ammonia vapor.