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- W2377327910 abstract "Besides using the conventional impregnation method, the CuO/ γ-Al2O3 catalysts, which are used for catalytic combustion of volatile organic compounds (VOCs), were also prepared separately by the impregnation method assisted with ultrasonic treatment. Using these catalysts prepared , the catalytic combustions of two kinds of VOCs, toluene and benzene, were carried out experimentally. The surface properties of these catalysts were characterized by scanning electron micrograph (SEM), X-ray diffraction (XRD), temperature-programmed reduction with H2 (H2-TPR) and X-ray photoelectron spectroscopy (XPS). The experimental results show that during catalytic combustion of VOCs, the activity of the CuO/ γ-Al2O3 catalysts prepared with using ultrasonic treatment is much higher than that of prepared by conventional impregnation method. SEM shows that the use of ultrasound makes the CuO particle size of CuO/ γ-Al2O3 catalyst prepared with using ultrasound much smaller than that of prepared by conventional impregnation method. XRD results show that the use of ultrasound causes the Cu ions highly disperse on the CuO/ γ-Al2O3 catalysts. TPR shows that ultrasound makes the CuO reduction occurs in two steps, that is from Cu(II ) to Cu(I) and then from Cu(I) to metallic copper. XPS analysis indicates that comparing with the CuO/ γ-Al2O3 catalysts prepared by conventional impregnation method, the binding energy level of the catalysts prepared with using ultrasound decrease from 934.2 eV to 933.1 eV, which indicates that the Cu existing on the catalyst surface is in the form of Cu2+ and Cu+." @default.
- W2377327910 created "2016-06-24" @default.
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- W2377327910 date "2006-01-01" @default.
- W2377327910 modified "2023-09-22" @default.
- W2377327910 title "Preparation of CuO/ γ -Al_2O_3 Catalysts with Ultrasonic Treatment for Catalytic Combustion of VOCs" @default.
- W2377327910 hasPublicationYear "2006" @default.
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