Abstract
Recently, field effect transistor type N,N-dimethylformamide (DMF) sensors have been widely studied, but semiconductor resistance type DMF gas sensors have not been reported much. Herein, porous LaFeO3 nanoparticles were prepared by reverse co-precipitation, and the gas sensing detection performance of material was studied. The sensor based on LaFeO3 calcined at 750 °C shows excellent response (Rg/Ra = 189.2), great selectivity and long-term stability to 100 ppm DMF at the operating temperature of 170 °C. The effects of different calcination temperatures (650 °C, 750 °C, 900 °C) on the structure and properties of LaFeO3 were compared. The structural characterization data revealed that LaFeO3 calcined at 750 °C has the appropriate specific surface area and abundant active sites, which plays a key role in promoting the adsorption and decomposition of target gas. In addition, the surface of the LaFeO3 calcined at 750 °C has the highest concentration of adsorbed oxygen, which also provides an excellent condition for gas-sensitive reactions on the surface of the material. Therefore, LaFeO3 is expected to be a potential novel material in DMF detection.
Funder
State Key Laboratory of Crystal Materials
State Key Lab of Advanced Metals and Materials
State Key Laboratory of Urban Water Resources & Environment, Harbin Institute of Technology
Shanghai Sailing Program
State Key Laboratory of Advanced Refractory Materials
Open Fund of Infrared and Low Temperature Plasma Key Laboratory of Anhui Province
Fund of State Key Laboratory of Mineral Processing
State Key Lab of Silicon Materials
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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