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- W8259025 abstract "The magnetite Fe3O4+δ (0 ≤ δ < 0.5) of different particle sizes were prepared using wet-heating oxidation method, supercritical fluid dry method and ferrous oxalate and ferric oxalate high-temperature decomposition method, and their structure were characterized by XRD, Mössbauer spectra, IR spectra and STEM. The oxygen-deficient magnetite of Fe3O4+δ (0 < δ < 1) was prepared using H2 reduction of Fe3O4+δ (0 ≤ δ < 0.5) at 573 K and its properties (lattice constant, magnetism, stability, and reduction ability) were studied in detail. The activity of decomposing CO2 with oxygen-deficient magnetite of different sizes were compared and the effects of degree of oxygen-deficiency, reaction time, and temperature on the activity of the decomposing CO2 into carbon with oxygen-deficient magnetite were investigated. It is found that oxygen in the CO2 was incorporated in the form of O2− into oxygen-deficient magnetite and CO2 was reduced to carbon, at the same time Fe3O4−δ converted into stoichiometric Fe3O4. The smaller the particle size of magnetite is, the larger the oxygen-deficient degree is, the higher the reaction temperature is, and the higher the activity of decomposing CO2 is." @default.
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- W8259025 date "2000-01-01" @default.
- W8259025 modified "2023-09-27" @default.
- W8259025 title "Studies on the decomposition of carbon dioxide into carbon with oxygen-deficient magnetite" @default.
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- W8259025 doi "https://doi.org/10.1016/s0254-0584(99)00169-8" @default.
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