Acetone gas-sensing performance of Sr-doped nanostructured LaFeO3 semiconductor prepared by citrate sol-gel route
Acetone gas-sensing performance of Sr-doped nanostructured LaFeO3 semiconductor prepared by citrate sol-gel route
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DOI：
10.1016/j.cap.2010.08.020
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发表时间：
2011-05-01
影响因子：
2.4
通讯作者：
Bajpeyee, A. U.
中科院分区：
文献类型：
--
作者：
Murade, P. A.;Sangawar, V. S.;Bajpeyee, A. U.
采用溶胶-凝胶柠檬酸盐法制备了La 1-xSrxFeO 3（x = 0，0.1，0.2，0.3，0.4）纳米晶。借助X射线衍射仪（XRD）和透射电子显微镜（TEM）分别对样品的结构和微观结构进行了表征。XRD研究证实了具有钙钛矿相的LaFeO 3的形成。进一步的研究还进行了傅里叶变换红外光谱。通过直流电导率测量研究了所制备的纳米颗粒的直流电性能。以丙酮（CH 3COCH 3）、乙醇（C2 H5 OH）、硫化氢（H2S）、氢气（H2-）和液化石油气（LPG）为还原气体，研究了La 1-xSrxFeO 3纳米粒子的气敏性能。纳米晶La0.7Sr0.3FeO3对丙酮气体具有良好的敏感性能，与LaFeO 3相比，在275 ℃下具有快速响应和高灵敏度。(C)2010 Elsevier BV保留所有权利。
Nanocrystalline La1-xSrxFeO3 (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 LaFeO3 with 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 La1-xSrxFeO3 nanoparticles was investigated towards different reducing gases like acetone (CH3COCH3), ethanol (C2H5OH), hydrogen sulfide (H2S), hydrogen (H-2) and liquefied petroleum gas (LPG). The nanocrystalline La0.7Sr0.3FeO3 exhibited good sensing performance towards acetone gas with rapid response and high sensitivity at 275 degrees C as compared with LaFeO3. (C) 2010 Elsevier B.V. All rights reserved.