Method for preparing magnetic ferromagnetic trioxide through anodic oxidation-coprecipitation
A technology of ferric tetroxide and anodic oxidation, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, inorganic material magnetism, etc., can solve the problem of large solvent consumption, low crystallinity and low yield And other issues
Active Publication Date: 2017-12-01
XUZHOU UNIV OF TECH
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Problems solved by technology
Among them, chemical methods include coprecipitation method, hydrothermal / solvothermal method, metal-organic precursor pyrolysis method, etc. The reaction equipment is simple, the conditions are mild, and the process is short, but there are many factors that affect particle size, crystallinity and product purity. , easy to generate non-magnetic α-Fe 2 o 3 or α-Fe 2 o 3 , Fe 3 o 4 mixture, and uneven agglomeration occurs; the microemulsion method can control the size distribution and morphology well, but the yield is low, the amount of solvent is large and the crystallinity is low
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Embodiment 1
[0028] Record it as Example a.
[0029] A method for preparing magnetic ferric iron tetroxide by anodic oxidation-co-precipitation, specifically comprising the following steps,
[0030] 1) A 220V 24W water quality electrolyzer is used. The electrode specifications are 5mm×70mm (diameter×length) iron electrodes and aluminum electrodes. The iron electrodes are polished with fine sandpaper, then cleaned with deionized water and absolute ethanol in sequence, and dried spare;
[0031] 2) Add 500mL of tap water (pH 6.4) into the beaker, and place 70% of the electrode length of the 220V 24W electrolyzer in the aqueous solution;
[0032] 3) Turn on the 220V AC power supply and continue the electrolysis for 60s (the temperature of the reaction solution also rises to boiling). After the electrolysis is stopped, the reaction solution is fully mixed by mechanical stirring, and it is in contact with the air. A large amount of black precipitate appears;
[0033] 4) After the temperature ...
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Abstract
The invention discloses a method for preparing magnetic ferromagnetic trioxide through anodic oxidation-coprecipitation, and belongs to the field of preparation of magnetic materials. The method comprises the steps that 1, tap water is added into a beaker, an electrode of a 220V 24W water quality electrolyzer is placed into the tap water, continuous electrolysis is carried out for 50-70 s, stirring is started after electrolysis is stopped till electrolyte is cooled to room temperature, and the electrolysis operation is repeated 6-10 times; and 2, after electrolysis is finished, the electrolyte is ultrasonically treated, a product is obtained through filtration and then is dried and ground, and Fe3O4 powder is obtained. Iron bars and tap water are used as raw materials, magnetic Fe3O4 is prepared based on anodic oxidation of an iron anode, reaction conditions can be adjusted and controlled according to material properties and requirements, magnetic materials with different sizes, magnetisms, crystal properties and morphologies are obtained, and therefore the requirements of cores of shell-core materials are met.
Description
technical field [0001] The invention relates to a method for preparing magnetic iron ferric oxide by anodic oxidation-co-precipitation, and belongs to the field of magnetic material preparation. Background technique [0002] At present, the common methods of using photocatalytic technology to treat sewage are: 1. Directly disperse photocatalyst powder into sewage for photocatalytic treatment of sewage. However, photocatalysts are difficult to separate and recycle, and may cause secondary pollution. Second, the photocatalyst is made into a film and loaded on a transparent carrier such as glass or silica gel. The defect of this method is that the contact area between the photocatalyst and the sewage is small, resulting in an unsatisfactory sewage treatment effect. [0003] Nano-magnetic materials have a huge specific surface area and good separation and recovery characteristics. As the carrier of photocatalysts, it is expected to use their magnetism to solve the problem of dif...
Claims
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Login to View More IPC IPC(8): C25B1/00H01F1/01B01J23/745
CPCH01F1/01C25B1/00B01J23/745B01J35/39
Inventor 李靖宋明刘天宝堵锡华唐辉
Owner XUZHOU UNIV OF TECH