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Reference type: Journal
Authors: Wang C, Rong Q, Zhang YM, Hu JC, Zi BY, Zhu ZQ, Zhang J, Liu QJ
Article Title: Molecular imprinting Ag-LaFeO3 spheres for highly sensitive acetone gas detection.
Publication date: 2019
Journal: Materials Research Bulletin
Volume: 109
Page numbers: 265-272.
DOI: 10.1016/j.materresbull.2018.09.040
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0025540818316040

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
Template and target information: acetone
Author keywords: acetone gas sensor, molecular imprinting technique, microsphere, high sensitivity


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