Isobutanol gas sensor based on Fe2O3–SnO2 heterostructure nanostructure

The rough surface Fe 2 O 3 –SnO 2 composite nanorod material was prepared by electrostatic spinning. The morphology and nanostructure of Fe 2 O 3 –SnO 2 composite nanorods were characterized by scanning electron microscopy SEM , nitrogen physical adsorption and X-ray diffraction. Through the analysis of the test results, it can be shown that the Fe 2 O 3 –SnO 2 nanorod samples prepared in this experiment have the advantages of high purity, good crystallinity and large specific surface area. The specific surface area of the sample obtained from the test is 19.27 m 2 /g. According to the gas sensitivity test results of Fe 2 O 3 –SnO 2 nanorods, it can be seen that Fe 2 O 3 –SnO 2 samples have high responsiveness and excellent gas sensitivity selectivity . Various gases were tested in this experiment, and it was found that the sensor has good gas selectivity to isobutanol. At 310 °C, the sensor's response to 100 ppm isobutanol reached 13. This experiment not only prepared Fe 2 O 3 –SnO 2 nanorod sensor with good isobutanol gas sensitivity. And it realized the accurate measurement of continuous isobutanol concentration. In addition, the gas sensitivity mechanism of Fe 2 O 3 –SnO 2 nanomaterials was discussed.