journal article·2013-01

Preparation and characterization of La1−x Sr x FeO3 materials and their formaldehyde gas-sensing properties

Peng-Jun Yao, Jing Wang, Wen-Ling Chu, Yu-Wen Hao

Journal of Materials Science· Volume 48· Issue 1
Publisher page

Abstract

La1−x Sr x FeO3 (x = 0.0–1.0) nanoparticles have been synthesized by a sol–gel method. The samples are characterized by thermogravimetric/differential thermal analysis (TG/DTA), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The La1−x Sr x FeO3 (x = 0.0–1.0) materials have been sintered at 650 °C. Both the structural properties and phase transitions with increasing strontium content in La1−x Sr x FeO3 are presented by analysis of XRD data. Formaldehyde gas-sensing properties of La1−x Sr x FeO3 have been investigated. The experimental results show that the optimum operating temperatures of La1−x Sr x FeO3 varies with Sr content of x. Among all the samples, La0.7Sr0.3FeO3 shows a maximum response to formaldehyde. Finally, the formaldehyde gas-sensing mechanism has been presented.
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Research context

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · ZnO doping and properties · Advancements in Solid Oxide Fuel Cells

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