• DocumentCode
    1513257
  • Title

    Gas Sensing Property of MgO Modified LaFeO _{3} Nanocomposites

  • Author

    Bai, S.L. ; Luo, R.X. ; Shi, B.J. ; Liu, Z.Y. ; Li, D.Q. ; Chen, A.F.

  • Author_Institution
    State Key Lab. of Chem. Resource Eng., Beijing Univ. of Chem. Technol., Beijing, China
  • Volume
    10
  • Issue
    10
  • fYear
    2010
  • Firstpage
    1633
  • Lastpage
    1634
  • Abstract
    LaFeO3 is a perovskite structure (ABO3) catalytic and p-type semiconductor sensing material, its sensing property for toxic gases is seldom reported. The nanocomposites of LaFeO3 and LaFe1-xMgx O3 (x = 0.02, 0.04, 0.06) were prepared by solution based method and their crystal structures were characterized by X-ray diffraction (XRD). The sensing test results showed that the response of LaFeO3 to NO2 is greatly enhanced by surface modify of MgO from the former 11.90 increased to 891 at the optimum operating temperature of 350°C, and could be contributed to increase of surface active sites supplied by MgO for both oxygen and NO2 adsorption and surface reaction. The effect of MgO loading and chemical state on gas sensing have been investigated by temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopic (XPS) analysis.
  • Keywords
    gas sensors; lanthanum compounds; nanocomposites; nitrogen compounds; oxygen; semiconductor devices; solutions; LaFe1-xMgxO3; LaFeO3; NO2; O2; X-ray diffraction; X-ray photoelectron spectroscopy; catalytic p-type semiconductor sensing material; crystal structure; gas sensing property; nanocomposites; perovskite structure; solution based method; temperature programmed desorption; toxic gases; LaFeO $_{3}$; MgO-modified; NO$_{2}$ ; sensing property;
  • fLanguage
    English
  • Journal_Title
    Sensors Journal, IEEE
  • Publisher
    ieee
  • ISSN
    1530-437X
  • Type

    jour

  • DOI
    10.1109/JSEN.2010.2047013
  • Filename
    5483074
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1513257