Ferroferric oxide porous ball having micro-nano structure, and preparation method of ferroferric oxide porous ball

Abstract

The invention discloses a ferroferric oxide porous ball having a micro-nano structure, and a preparation method of the ferroferric oxide porous ball. The ferroferric oxide porous ball having the micro-nano structure is prepared by annealing a ferrous carbonate porous ball having the micro-nano structure under the atmosphere of argon; the ferrous carbonate porous ball having the micro-nano structure is prepared by mixing ferric trichloride, urea and ascorbic acid; absorption and reduction of the synthesized ferroferric oxide porous ball having the micro-nano structure to heavy metal hexavalent chromium ion are tested. During preparation of ferrous carbonate by a hydrothermal process, a dispersing agent and a surfactant are not required; and substances such as a template are absent, so the ferroferric oxide porous ball having the micro-nano structure is environment-friendly, and aftertreatment is convenient; moreover, the reaction temperature is low and the process is simple; and due to a porous structure, the ferroferric oxide porous ball having the micro-nano structure prepared by the method has high specific surface and high activity of the nano structure, and can prevent gathering of particles effectively.

Description

technical field [0001] The invention relates to a micro-nano structured iron ferric oxide porous ball and a preparation method thereof. Ferrous carbonate is used as a precursor to prepare a micro-nano structured iron ferric oxide porous ball, and the effect of the micro-nano structured iron ferric oxide porous ball on Application in the treatment of heavy metal hexavalent chromium ions in aqueous solution. Background technique [0002] As we all know, environmental pollution is becoming more and more serious, and industrial sewage contains various heavy metal ions. Chromium is widely used in industrial processes such as electrospinning, metal polishing, dyes, or as an additive to protective coatings on stainless steel. But once the chromium ion is released into the environment, it will form pollution in the soil or water environment. Hexavalent chromium is soluble and mobile in water environment, and has great toxicity to animals and plants. Because the toxicity of trival...

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Problems solved by technology

In the method for the preparation of ferric oxide of various bibliographical reports, ferrous ion and ferric ion are usually prepared ferric oxide by co-precipitation method under alkaline environment, but due to the existence of oxygen in the air, usually need pass through The inert gas eliminates oxygen interference to strictly control the ratio of ferrous ions and ferric ions. The preparation process is cumbersome and not easy to control; using hydrogen or carbon monoxide to reduce ferric oxide to prepare ferric oxide, this method is applied to dangerous flammable gases

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