Hydrocarbon gas sensing of nano-crystalline perovskite oxides LnFeO3 (Ln = La, Nd and Sm)
Hydrocarbon gas sensing of nano-crystalline perovskite oxides LnFeO3 (Ln = La, Nd and Sm)
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DOI：
10.1016/j.snb.2011.06.013
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发表时间：
2011-11
影响因子：
8.4
通讯作者：
Ho Truong Giang;Ha Thai Duy;Phạm Quang Ngân;Giang Hồng Thái;Do Thi Anh Thu;Do Thi Anh Thu;N. Toan
中科院分区：
文献类型：
--
作者：
Ho Truong Giang;Ha Thai Duy;Phạm Quang Ngân;Giang Hồng Thái;Do Thi Anh Thu;Do Thi Anh Thu;N. Toan
本文报道了用溶胶-凝胶柠檬酸盐法合成的纳米晶氧化物LnFeO_3（Ln=La，Nd和Sm）的性质。通过X射线衍射（XRD）分析了氧化物的晶体结构。利用扫描电子显微镜（SEM）对LnFeO 3厚膜在Al 2 O3衬底上的表面形貌进行了表征。以甲烷（CH 4）、丙烷（C3 H8）和正己烷（C6 H14）为气敏气体，研究了氧化物LnFeO 3的气敏特性。所有的LnFeO 3基传感器表现出良好的HC感测特性。讨论了稀土元素在NdFeO 3和SmFeO 3基传感器中的重要作用。
In this paper, we report the properties of the nano-crystalline oxides LnFeO3(Ln=La, Nd and Sm) synthesized by sol–gel citrate technique. The crystalline structure of the oxides was analyzed by X-ray diffraction (XRD). The surface morphologies of the LnFeO3thick-films on Al2O3substrates were measured by scanning electron microscope (SEM). The gas-sensing characteristics of the oxides LnFeO3were investigated in methane (CH4), propane (C3H8) and n-hexane (C6H14) gases. All LnFeO3-based sensors exhibited good HC sensing characteristics. The very high n-hexane sensitivities of NdFeO3and SmFeO3-based sensors were discussed in terms of an important role of rare earth elements.