Molecular imprinting Ag-LaFeO3 spheres for highly sensitive acetone gas detection
Source abstract
Abstract
Abstract In this paper, Sliver doped LaFeO3 nanocrystalline sphere were prepared by sol-gel and molecular imprinting technique (MIT). The carbon microsphere was used as template to regulate the morphology of Ag-LaFeO3, and will be burning off after annealing. The synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and Fourier transform infrared spectrometer (FT-IR) and X-ray photoelectron spectroscopy (XPS). The gas-sensing performance of Ag-LaFeO3 molecular imprinting spheres (MIT Ag-LaFeO3 spheres) was compared with that of Ag-LaFeO3 nanoparticles. The gas sensors fabricated with the MIT Ag-LaFeO3 spheres samples possess high sensitivity and good selectivity than that of Ag-LaFeO3 nanoparticles. At the optimal operating temperature of 155 °C, the response of the MIT Ag-LaFeO3 spheres sensor to 5 ppm acetone is 23.3, which is 16 higher than that of Ag-LaFeO3 sensor, and the response and recovery times are 55 s and 60 s, respectively. It was found that the MIT Ag-LaFeO3 spheres exhibited excellent acetone gas-sensing properties.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors · Advanced Chemical Sensor Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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