期刊
NANOMATERIALS
卷 12, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/nano12101768
关键词
perovskite; Ag; LaFeO3; ethanol sensing; gas sensor
类别
资金
- National Natural Science Foundation of China [62071300]
- Science and Technology Commission of Shanghai Municipality [19ZR1435200, 21ZR1444200, 20490761100, YDZX20213100003002]
In this study, Ag in situ modified porous LaFeO3 nanosheets were synthesized for ethanol detection. The nanosheets exhibited fast response/recovery times and high selectivity, attributed to their unique crystal structure and physical-chemical properties.
Perovskite (ABO(3)) nanosheets with a high carrier mobility have been regarded as the best candidates for gas-sensitive materials arising from their exceptional crystal structure and physical-chemical properties that often exhibit good gas reactivity and stability. Herein, Ag in situ modified porous LaFeO3 nanosheets were synthesized by the simple and efficient graphene oxide (GO)-assisted co-precipitation method which was used for sensitive and selective ethanol detection. The Ag modification ratio was studied, and the best performance was obtained with 5% Ag modification. The Ag/LaFeO3 nanomaterials with high surface areas achieved a sensing response value (R-g/R-a) of 20.9 to 20 ppm ethanol at 180 degrees C with relatively fast response/recovery times (26/27 s). In addition, they showed significantly high selectivity for ethanol but only a slight response to other interfering gases. The enhanced gas-sensing performance was attributed to the combination of well-designed porous nanomaterials with noble metal sensitization. The new approach is provided for this strategy for the potential application of more P-type ABO(3) perovskite-based gas-sensitive devices.
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