Preparation method and application of porous magnetoplumbite barium ferrite
A technology of barium ferrite and magnetoplumbite, which is applied in the field of preparation of porous magnetoplumbite type barium ferrite, can solve the problems that threaten the sustainable development of society, the urgent need to treat waste water, and the high content of organic pollutants, and achieve good application The effect of high value, cheap raw materials, and low calcination temperature
Inactive Publication Date: 2018-02-13
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
Water shortages and accidents caused by pollution not only stop production in factories, reduce agricultural production or even cut off harvests, but also cause adverse social impacts and large economic losses, seriously threatening the sustainable development of society and human beings. survival, so it is urgent to treat wastewater
[0003] Dye wastewater has become one of the difficult industrial wastewater due to its complex composition, deep color, high content of organic pollutants, refractory degradation, and most dyes and their metabolic intermediates are mutagenic, carcinogenic and other toxic.
Method used
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Embodiment 1
[0025] Dissolve 27.3g of citric acid in 200mL of deionized water at room temperature, then add 48.48g of ferric nitrate nonahydrate and 2.62g of barium nitrate, stir and dissolve at room temperature, and obtain a uniformly dispersed transparent solution. Ammonia water is added dropwise to the transparent solution to adjust the pH value of the solution to 8, and the solution is heated and stirred in a water bath at 90°C for 2-4 hours to evaporate the water until a gel with a water content of <10% is formed. The gel was placed in a drying oven and dried at 120° C. for 48 hours to obtain a xerogel. Ignite the xerogel with alcohol to cause self-propagating combustion, grind the burned residue, wash it with water, and dry it, then place it in a muffle furnace and heat it up to 850°C at a rate of 8°C / min for calcination for 2 hours , The product porous M-type (magnetoplumbite-type) ferrite is obtained.
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The invention relates to a preparation method and application of porous magnetoplumbite barium ferrite. The method takes citric acid as a complexing agent, ammonium hydroxide as a precipitator, and iron nitrate nonahydrate and barium nitrate as the raw materials, and a sol-gel method and a self-propagating combustion method are combined to prepare the porous magnetoplumbite barium ferrite. The method has the advantages that the raw materials are cheap and easy to get, the process is simple, the operation is convenient, the method is energy-saving and efficient, the homogeneity of the product is good, and the morphology is controllable; a prepared magnetoplumbite barium ferrite powder has a porous structure, is high in specific surface area and relatively good in adsorptive property, can beapplied to the absorption of pollutants in the environment field, and is easy to separate and recycle.
Description
technical field [0001] The invention relates to the technical field of porous magnetic adsorption materials, in particular to a preparation method and application of porous magnetoplumbite barium ferrite. Background technique [0002] With the rapid development of modern industrialization, environmental pollution is becoming more and more serious, among which water pollution is the most serious. Water is the source of life, and in recent years, the quality of my country's water resources has continued to decline, and the water environment has continued to deteriorate. Water shortages and accidents caused by pollution not only stop production in factories, reduce agricultural production or even cut off harvests, but also cause adverse social impacts and large economic losses, seriously threatening the sustainable development of society and human beings. Survival, so the treatment of waste water is urgent. [0003] Dye wastewater has become one of the difficult industrial wa...
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IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F101/30C02F101/36C02F101/38
Inventor 胡学雷王琼冯菊红李倩茜葛燕丽
Owner WUHAN INSTITUTE OF TECHNOLOGY
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