Preparation method of porous diatomite-based AgO ceramic material

A technology of ceramic materials and diatomite, which is applied in the field of preparation of diatomite-based porous AgO ceramic materials, can solve the problems of easy agglomeration of ultrafine AgO powder, high processing costs, and difficulty in recycling, and achieve low preparation costs and reduced sterilization cost, churn reduction effect

Inactive Publication Date: 2011-05-18
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of a diatomite-based porous AgO ceramic material, which solves the problems of easy agglomeration, difficult recovery, difficult regeneration and relatively high processing costs of ultrafine AgO powder in water treatment applications, reducing The loss of silver peroxide reduces the cost of silver peroxide sterilization

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  • Preparation method of porous diatomite-based AgO ceramic material
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  • Preparation method of porous diatomite-based AgO ceramic material

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[0017] The preparation method of the diatomite-based porous AgO ceramic material provided by the invention comprises the following steps:

[0018] Step 1: Clean the original diatomite with deionized water, then calcinate the cleaned diatomite at 540°C to 560°C for 2 hours, and cool down with the furnace to obtain refined diatomite;

[0019] Step 2, get the refined diatomite prepared in step 1 and mix it with glue to form a wet powder, the mass ratio of diatomite to glue is 2: 3, and the glue is composed of water, sodium carbonate, polyacrylamide and polyvinyl alcohol Composition, the mass ratio of water: sodium carbonate: polyacrylamide: polyvinyl alcohol is 1000: 67: 6: 4, the mixed wet powder is extruded into a sample, and the formed sample is dried at 60°C for 5h~7h, Calcining at 900°C for 0.5h, cooling in the furnace to obtain a porous ceramic sample, and making the ceramic sample into ceramic particles;

[0020] Step 3, immerse the ceramic particles prepared in step 2 in...

Embodiment 1

[0029] Wash the original diatomite with deionized water, calcinate at 540°C for 2 hours, and cool in the furnace to obtain refined diatomite; mix 10g of refined diatomite with 15mL of water, 1.0g of sodium carbonate, and 0.1g of polyacrylamide , 0.06g of polyvinyl alcohol was mixed evenly to prepare a molding wet powder, and the wet powder was extruded into a cylindrical sample with a diameter of 6 mm. After the molded sample was dried at 60°C for 5 hours, it was placed in a muffle furnace and heated at 900 Calcined at ℃ for 0.5h, cooled with the furnace to obtain a porous ceramic sample, and cut the ceramic sample into ceramic particles with a diameter of Φ×h of 6mm×6mm for later use; immerse 10g of diatomite-based ceramic particles in 25mL of silver nitrate with a concentration of 1.5mol / L In the solution, heat the silver nitrate solution containing ceramic particles to 40°C, and at a stirring speed of 2000r / min, add 100mL of potassium persulfate solution with a molar ratio o...

Embodiment 2

[0031] Wash the original diatomite with deionized water, calcinate at 550°C for 2 hours, and cool in the furnace to obtain refined diatomite; mix 10g of refined diatomite with 15mL of water, 1.0g of sodium carbonate, and 0.1g of polyacrylamide , 0.06g of polyvinyl alcohol was mixed evenly to prepare a molding wet powder, and the wet powder was extruded into a cylindrical sample with a diameter of 6 mm. After the molded sample was dried at 60°C for 6 hours, it was put into a muffle furnace and heated at 900 Calcined at ℃ for 0.5h, cooled in the furnace to obtain a porous ceramic sample, and cut the ceramic sample into ceramic particles with a diameter of Φ×h of 6mm×6mm for later use; immerse 10g of diatomite-based ceramic particles in 25mL of silver nitrate with a concentration of 2.0mol / L solution, then heat the silver nitrate solution containing ceramic particles to 60°C, and at a stirring speed of 2000r / min, add 100mL of potassium persulfate solution with a molar ratio of 3 t...

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Abstract

The invention discloses a preparation method of a porous diatomite-based AgO ceramic material, comprising the following steps of: firstly, preparing fine diatomite by raw diatomite, mixing the find diatomite, water, sodium carbonate, polyacrylamide and polyvinyl alcohol to prepare wet powder, extruding and sintering the wet powder to prepare porous ceramic strips, and then preparing the porous ceramic strips into required ceramic particles; soaking the ceramic particles in a silver nitrate solution, adding a potassium persulfate solution and a potassium hydroxide solution into the solution for reaction for 1-4 hours, and filtering out the ceramic particles; and washing and drying the filtered ceramic particles to obtain the porous diatomite-based AgO ceramic material. The porous AgO-carried ceramic material is prepared with method provided by the invention, AgO is an efficient bactericide, and porous ceramic is a filter medium with high cost performance, thereby the prepared novel material can be used for sterilizing and filtering in water, reducing the loss of the AgO, and lowering the water treatment cost. The preparation method has the advantages of simplicity in process and preparation equipment, low preparation cost and no pollutant discharge.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous composite inorganic oxide ceramics, and in particular relates to a preparation method of a diatomite-based porous AgO ceramic material. Background technique [0002] As an important bactericidal material, silver compounds have strong antibacterial, bactericidal and broad-spectrum antibacterial capabilities, which prevent bacteria from developing drug resistance, and are safe and non-toxic to humans, and have attracted widespread attention. With the in-depth research on the antibacterial properties of silver compounds, it is found that the bactericidal effect of silver is related to the valence state and particle size of silver. The higher the valence state and the finer the particles, the stronger the bactericidal ability. As a new type of inorganic functional material, silver peroxide has special electromagnetic properties, electrochemical activity, strong oxidation, non-toxicity an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B41/85
Inventor 冯拉俊沈文宁雷阿利
Owner XIAN UNIV OF TECH
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