Hydrocarbon gas sensing of nano-crystalline perovskite oxides LnFeO3 (Ln=La, Nd and Sm)
| Autor: | Giang Hong Thai, Do Thi Thu, Pham Quang Ngan, Ha Thai Duy, Do Thi Anh Thu, Ho Truong Giang, Nguyen Ngoc Toan |
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| Rok vydání: | 2011 |
| Předmět: |
Diffraction
chemistry.chemical_classification Materials science Scanning electron microscope Inorganic chemistry Metals and Alloys Analytical chemistry Crystal structure Condensed Matter Physics Methane Surfaces Coatings and Films Electronic Optical and Magnetic Materials Hexane chemistry.chemical_compound Hydrocarbon chemistry Propane Materials Chemistry Electrical and Electronic Engineering Instrumentation Perovskite (structure) |
| Zdroj: | Sensors and Actuators B: Chemical. 158:246-251 |
| ISSN: | 0925-4005 |
| Popis: | In this paper, we report the properties of the nano-crystalline oxides Ln FeO 3 ( 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 Ln FeO 3 thick-films on Al 2 O 3 substrates were measured by scanning electron microscope (SEM). The gas-sensing characteristics of the oxides Ln FeO 3 were investigated in methane (CH 4 ), propane (C 3 H 8 ) and n -hexane (C 6 H 14 ) gases. All Ln FeO 3 -based sensors exhibited good HC sensing characteristics. The very high n -hexane sensitivities of NdFeO 3 and SmFeO 3 -based sensors were discussed in terms of an important role of rare earth elements. |
| Databáze: | OpenAIRE |
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