Ho, Truong Giang and Ha, Thai Duy and Pham, Quang Ngan (2011) Hydrocarbon gas sensing of nano-crystalline perovskite oxides LnFeO3. Sensors and Actuators B: Chemical .
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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 LnFeO3 thick-films on Al2O3 substrates were measured by scanning electron microscope (SEM). The gas-sensing characteristics of the oxides LnFeO3 were 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 NdFeO3 and SmFeO3-based sensors were discussed in terms of an important role of rare earth elements.
|Subjects:||Material Science > Nanochemistry|
|Deposited On:||23 May 2012 15:35|
|Last Modified:||23 May 2012 15:35|
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