A method for preparing magnetic ferroferric oxide by anodic oxidation-co-precipitation
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, uneven agglomeration, crystallinity lower problem
Active Publication Date: 2019-02-05
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 contacted with air. As the reaction temperature decreases and then A large amount of black precipitate appears; ...
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The invention discloses a method for preparing magnetic ferroferric oxide by anodization-co-precipitation, which belongs to the field of magnetic material preparation and includes the steps of: 1) adding tap water to a beaker, placing the electrodes of a 220V 24W water quality electrolyzer in the tap water; Continue electrolysis for 50-70 seconds, stop electrolysis and start stirring until the electrolyte cools to room temperature. Repeat the above electrolysis operation 6-10 times; 2) After the electrolysis is completed, ultrasonic treat the electrolyte, filter the product, dry and grind it. Get Fe3O4 powder. The present invention uses iron rods and tap water as raw materials, and prepares magnetic Fe3O4 based on anodizing of iron anodes. The reaction conditions can also be adjusted according to the material properties to obtain magnetic materials with size, magnetism, crystallinity and different morphologies to meet the needs of the shell core. The "core" of materials is needed.
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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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