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Pure and Er-doped In_2O_3 nanotubes were systematically fabricated by using a single nozzle eletrospinning method followed by calcination.The as-synthesized nanotubes were characterized by scanning electron microscopy(SEM),energy-dispersive X-ray(EDX) spectrometry and X-ray powder diffraction(XRD).Compared with pure In_2O_3 nanotubes,Er-doped In_2O_3 nanotubes exhibit improved formaldehyde sensing properties at 260 ℃.The response of Er-doped In_2O_3 nanotubes to 20 ppm formaldehyde is about 12,which is 4 times larger than that of pure In_2O_3 nanotubes.The response and recovery times of Er-doped In_2O_3 nanotubes to 20 ppm formaldehyde are about 5 and 38 s,respectively.Furthermore,the response of Er-doped In_2O_3 nanotubes to 100 ppb formaldehyde is 2.19.
Pure and Er-doped In_2O_3 nanotubes were systematically fabricated by using a single nozzle eletrospinning method followed by calcination.The as-synthesized nanotubes were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectrometry and X-ray powder diffraction (XRD) .Compared with pure In 2 O 3 nanotubes, Er-doped In 2 O 3 nanotubes exhibit improved formaldehyde sensing properties at 260 ° C. The response of Er-doped In 2 O 3 nanotubes to 20 ppm formaldehyde is about 12, which is 4 times larger than that of pure In_2O_3 nanotubes. The response and recovery times of Er-doped In_2O_3 nanotubes to 20 ppm of formaldehyde are about 5 and 38 s, respectively. Future, the response of Er-doped In_2O_3 nanotubes to 100 ppb of formaldehyde is 2.19.