Method for preparing ferrate based on carbon sheet iron plating

Abstract

The invention discloses a method for preparing ferrate based on carbon sheet iron plating. The method comprises the following steps that electroplating liquid and an electroplating device are prepared, a double-anode electroplating method is adopted, a rough carbon sheet with pock marks and cracks on the surface is selected as an iron plating cathode, namely a cathode carbon sheet, electroplating is conducted, and a carbon electrode containing an iron plating layer is prepared and obtained; an electrolytic bath device is made, and the electroplated carbon electrode containing the iron plating layer is washed with distilled water and is dried; soaking is conducted with NaOH; the obtained material serves as anode material and is placed in an anode chamber; a carbon rod serves as cathode material and is placed in a cathode chamber; and voltage is adjusted, the cathode current density is controlled to 135 A / m3, electrolysis is conducted in a mixed alkaline solution, and the ferrate is prepared. According to the method, the rough surface of the carbon sheet is utilized and is combined with the electroplating method, iron plating is conducted on the surface of the carbon sheet, the obtained elementary substance iron has good activity. The yield of the ferrate prepared through the method is improved significantly, and meanwhile, the problem of iron surface passivation appearing due to the fact that cast iron or a iron gauze is directly used as an anode is solved effectively.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and in particular relates to a method for preparing ferrate based on carbon sheet iron plating. Background technique [0002] Ferrate is an oxygen-containing salt of high-valent iron with positive hexavalent, and has certain application value in the fields of sewage treatment, sterilization and battery energy. At present, the methods for synthesizing ferrate mainly include high temperature melting oxidation, hypochlorite oxidation and electrolysis. Although the fusion method can be mass-produced, the equipment requirements are harsh and the operation is dangerous; the hypochlorite oxidation method is low in cost, but the operation procedure is complicated, the pollution is large, and the production is difficult to scale; the electrolysis method has low yield and high energy consumption. However, compared with the high-temperature melting oxidation method and the hypochlorite oxi...

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Problems solved by technology

Although the fusion method can be mass-produced, the equipment requirements are harsh and the operation is dangerous; the hypochlorite oxidation method is low in cost, but the operation procedure is complicated, the pollution is large, and the production is difficult to scale; the electrolysis method has low yield and high energy consumption. However, compared with the high-temperature melting oxidation method and hypochlorite oxidation method, the electrolysis method is simple to operate and does not have a large operational risk

However, the iron anode is easily passivated in the traditional electrolysis process, which hinders the preparation of ferric acid

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