Journal
FRONTIERS IN MATERIALS
Volume 6, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmats.2019.00163
Keywords
Cr2O3 nanoparticles; SnO2 nanofibers; electrospinning; C2H2; sensing properties
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Funding
- National Natural Science Foundation of China [51507144]
- Fundamental Research Funds for the Central Universities [XDJK2019B021]
- artificial intelligence key project of Chongqing [cstc2017rgzn-zdyfX0030]
- Chongqing Science and Technology Commission (CSTC) [cstc2016jcyjA0400]
- project of China Scholarship Council (CSC)
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In this work, Cr2O3 nanoparticles, and SnO2 nanofibers were fabricated by a sol-gel process and an electrospinning method, respectively. Gas sensitive materials with high sensitivity to C2H2 gas were obtained by coating Cr2O3 nanoparticles on SnO2 nanofibers. The prepared Cr2O3 nanoparticle-coated SnO2 nanofibers (Cr2O3 NPs. coated SnO2 NFs.) were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and the gas sensing behaviors to C2H2 were studied. The Cr2O3 NPs. coated SnO2 NFs. exhibited low optimal operating temperature, high sensing response, excellent response-recovery time, and long-termstability to C2H2. The optimal operating temperature of the measured material to 20 ppm C2H2 was about 220 degrees C and the C2H2 concentration had a good linear relationship with the response value when the concentration was 60 ppm. In addition, a reasonable gas sensing mechanism was proposed which may enhance the gas sensing performances for the Cr2O3 NPs. coated SnO2 NFs. to C2H2.
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