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• W3205435496 endingPage "130931" @default.
• W3205435496 startingPage "130931" @default.
• W3205435496 abstract "As the demand for detecting harmful gases becomes more and more urgent, a potential gas-sensing material with high response and good selectivity based on Co 3 O 4 -functionalized WO 3 hollow microspheres was successfully synthesized in this study. A variety of techniques were employed to analyze the chemical and structural properties of the samples, involving X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Energy Dispersive Spectrometer (EDS) and X-ray Photoelectron Spectroscopy (XPS). The gas-sensing properties of WO 3 , Co 3 O 4 and Co 3 O 4 -functionalized WO 3 hollow spheres towards toluene were investigated to determine the effects of functionalization. In comparison with pure WO 3 hollow microspheres, the sensing properties of the complex modified by Co 3 O 4 nanoparticles to toluene were significantly enhanced. The response value of the composite to 100 ppm toluene could reach 55.8, which was nearly three times higher than that of pure WO 3 hollow microspheres. The enhancement of gas sensitivity could be mainly attributed to the catalytic activity of Co 3 O 4 in the process of toluene oxidation, the increase in chemisorbed oxygen species and oxygen vacancies, and the widening in conductive channel as a result of the existence of Co 3 O 4 nanoparticles in the Co 3 O 4 -functionalized WO 3 composite. • Co 3 O 4 -functionalized WO 3 hollow spheres were successfully synthesized by a two-step hydrothermal method. • A variety of techniques were employed to analyze the chemical and structural properties of the samples. • The response of the composite to 100 ppm toluene was nearly three times higher than that of WO 3 hollow microspheres. • The effects of Co 3 O 4 on the improvement of sensing performances were discussed." @default.
• W3205435496 created "2021-10-25" @default.
• W3205435496 creator A5009007385 @default.
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• W3205435496 date "2022-01-01" @default.
• W3205435496 modified "2023-10-01" @default.
• W3205435496 title "Self-assembled Co3O4@WO3 hollow microspheres with oxygen vacancy defects for fast and selective detection of toluene" @default.
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• W3205435496 doi "https://doi.org/10.1016/j.snb.2021.130931" @default.
• W3205435496 hasPublicationYear "2022" @default.
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