High Response Gas Sensors for Formaldehyde Based on Er-doped In2O3 Nanotubes

doi:10.1016/j.jmst.2015.11.002

Abstract

Abstract: Pure and Er-doped In₂O₃ 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 In₂O₃ nanotubes, Er-doped In₂O₃ nanotubes exhibit improved formaldehyde sensing properties at 260 °C. The response of Er-doped In₂O₃ nanotubes to 20 ppm formaldehyde is about 12, which is 4 times larger than that of pure In₂O₃ nanotubes. The response and recovery times of Er-doped In₂O₃ nanotubes to 20 ppm formaldehyde are about 5 and 38 s, respectively. Furthermore, the response of Er-doped In₂O₃ nanotubes to 100 ppb formaldehyde is 2.19.

Key words: Er-doped In2O3 nanotubes, Formaldehyde, Gas sensor

Xuesong Wang, Jinbao Zhang, Lianyuan Wang, Shouchun Li, Li Liu, Chang Su, Lili Liu. High Response Gas Sensors for Formaldehyde Based on Er-doped In₂O₃ Nanotubes[J]. J. Mater. Sci. Technol., 2015, 31(12): 1175-1180.

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High Response Gas Sensors for Formaldehyde Based on Er-doped In₂O₃ Nanotubes

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