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        Acetone gas-sensing performance of Sr-doped nanostructured LaFeO_3 semiconductor prepared by citrate sol―gel route

        P.A. Murade,V.S. Sangawar,G.N. Chaudhari,V.D. Kapse,A.U. Bajpeyee 한국물리학회 2011 Current Applied Physics Vol.11 No.3

        Nanocrystalline La_(1-x)Sr_xFeO_3 (x = 0, 0.1, 0.2, 0.3 and 0.4) was prepared by sol―gel citrate method. The structural and microstructural characterization has been carried out with the help of X-ray diffraction (XRD)and transmission electron microscopy (TEM), respectively. XRD studies confirm the formation of LaFeO_3with perovskite phase. Further studies by Fourier transform infrared spectroscopy were also conducted. DC electrical properties of the prepared nanoparticles were studied by D.C. conductivity measurements. The gas-sensing performance of the as-prepared La_(1-x)Sr_xFeO_3 nanoparticles was investigated towards different reducing gases like acetone (CH_3COCH_3), ethanol (C_2H_5OH), hydrogen sulfide (H_2S), hydrogen (H_2) and liquefied petroleum gas (LPG). The nanocrystalline La_0.7Sr_0.3FeO_3 exhibited good sensing performance towards acetone gas with rapid response and high sensitivity at 275 ℃ as compared with LaFeO_3.

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