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In_2O_3–Fe_2O_3 nanotubes are synthesized by an electrospinning method. The as-synthesized materials are characterized by scanning electron microscope and X-ray powder diffraction. The gas sensing results show that In_2O_3–Fe_2O_3 nanotubes exhibit excellent sensing properties to acetone and formaldehyde at different operating temperatures. The responses of gas sensors based on In_2O_3–Fe_2O_3 nanotubes to 100 ppm acetone and 100 ppm formaldehyde are 25(240 ℃) and 15(260 ℃), and the response/recovery times are 3/7 s and 4/7 s, respectively.The responses of In_2O_3–Fe_2O_3 nanotubes to 1 ppm acetone(240 ℃) and formaldehyde(260 ℃) are 3.5 and 1.8,respectively. Moreover, the gas sensor based on In_2O_3–Fe_2O_3 nanotubes also possesses an excellent selectivity to acetone and formaldehyde.
The as-synthesized materials are characterized by scanning electron microscope and X-ray powder diffraction. The gas sensing results show that In 2 O 3 -Fe 2 O 3 nanotubes exhibit excellent sensing properties to acetone and formaldehyde at different operating The responses of gas sensors based on In_2O_3-Fe_2O_3 nanotubes to 100 ppm acetone and 100 ppm formaldehyde are 25 (240 ° C) and 15 (260 ° C), and the response / recovery times are 3/7 s and 4/7 s , respectively. These responses of In_2O_3-Fe_2O_3 nanotubes to 1 ppm acetone (240 ° C) and formaldehyde (260 ° C) are 3.5 and 1.8, respectively. Moreover, the gas sensor based on In_2O_3-Fe_2O_3 nanotubes also possesses an excellent selectivity to acetone and formaldehyde.