Abstract
The influence of the ultrasonic treatment (UST) of the ZnO/MoO3 oxide system with atomic ratios of Zn/Mo = 15:85, 25:75, 50:50, and 75:25 on their properties was investigated. Using X-ray diffraction (XRD) analysis, it was found that in the sonochemical activation process, the phase transformation in molybdenum oxide, the formation of molybdenum suboxides (Mo4O11, Mo8O23), and the triclinic modification of the zinc molybdate α-ZnMoO4 occurred. The structure and morphology of ZnMoO4, which were characterized by transmission electron microscopy and scanning electron microscopy analyses, show the formation of nanodispersed needle-like crystals. It was found that as a result of sonochemical treatment, the grinding and increase in the specific surface area of the compositions take place. The samples obtained after UST demonstrate very promising results in the oxidative dehydrogenation of ethanol to acetaldehyde and the treated composition with a ratio of Zn/Mo = 50:50 permits an acetaldehyde yield equal to 94% to be obtained at a reaction temperature of 255 °C.
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Acknowledgments
This work was financially supported by NASU Programs: Fundamental Research “New Functional Substances and Materials for Chemical Engineering” (project 7-17/18) and Program for Young Scientists (project 41: “Synthesis of new nanodispersed photocatalysts of environmental protection processes”).
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Zazhigalov, V.O., Sachuk, O.V., Diyuk, O.A., Kopachevska, N.S., Starchevskyy, V.L., Kurmach, M.M. (2019). The Effect of Ultrasonic Treatment on the Physical–Chemical Properties of the ZnO/MoO3 System. In: Fesenko, O., Yatsenko, L. (eds) Nanocomposites, Nanostructures, and Their Applications. NANO 2018. Springer Proceedings in Physics, vol 221. Springer, Cham. https://doi.org/10.1007/978-3-030-17759-1_11
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