In-situ composite antibacterial filtering ceramic as well as preparation method and application thereof

A technology for in-situ composite and filtration of ceramics, applied in ceramic products, applications, filtration and separation, etc., can solve the problems of easy agglomeration of silver nanoparticles, loss of nanometer effect, etc., to avoid agglomeration, ensure filtration accuracy, and enhance binding force Effect

Inactive Publication Date: 2017-03-22
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can enhance the binding force of silver, the silver nanoparticles are easy to agglomerate and lose the nano effect at high temperature.

Method used

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  • In-situ composite antibacterial filtering ceramic as well as preparation method and application thereof
  • In-situ composite antibacterial filtering ceramic as well as preparation method and application thereof
  • In-situ composite antibacterial filtering ceramic as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 11.81gCa(NO 3 ) 2 ·4H 2 O, dissolve with 200mL deionized water to obtain 0.25mol / L calcium nitrate solution; weigh 3.96g (NH 4 ) 2 HPO 4 , dissolved in 100 mL of deionized water to obtain a 0.3 mol / L diammonium hydrogen phosphate solution, and adjusted its pH to 10 with ammonia;

[0031] (2) 0.3g AgNO 3 Add calcium nitrate solution to dissolve, and add 22.5g diatomite to obtain diatomite mixed solution;

[0032] (3) The diammonium hydrogen phosphate solution was added dropwise to the diatomite mixed solution and continuously stirred, then poured into the reaction kettle for hydrothermal reaction, the reaction temperature was 120°C, pH=10, and the reaction time was 4h;

[0033] (4) After the reaction solution obtained in step (3) was settled for 12 hours, the supernatant was poured out, washed with deionized water and ethanol, and filtered 3 times until the filtrate was basically neutral (pH=6~8), 70° C. drying to obtain dry powder;

[0034](5) Mix dry ...

Embodiment 2

[0044] (1) Weigh 11.1g CaCl 2 , dissolved in 300mL deionized water to obtain a 0.33mol / L calcium chloride solution; weigh 21.5gNa 2 HPO 4 ·12H 2 O, dissolve with 200mL deionized water to obtain a 0.3mol / L disodium hydrogen phosphate solution, and adjust its pH to 11 with ammonia water;

[0045] (2) 0.5gAgNO 3 Add to the calcium chloride solution to dissolve, and add 50g of diatomite to obtain a diatomite mixed solution;

[0046] (3) Add the disodium hydrogen phosphate solution dropwise into the mixed solution of diatomaceous earth and stir continuously, then pour it into the reaction kettle for hydrothermal reaction, the reaction temperature is 160°C, pH=11, and the reaction time is 6h;

[0047] (4) Precipitate the reaction solution obtained in step (3) for 12 hours, discard the supernatant, wash with deionized water and ethanol, and filter 3 times until the filtrate is basically neutral (pH=6-8). Dry to obtain dry powder;

[0048] (5) Batching dry powder and purple sand...

Embodiment 3

[0051] (1) Weigh 23.6g Ca (NO 3 ) 2 ·4H 2 O, dissolved in 200mL deionized water to obtain a 0.5mol / L calcium nitrate solution; weigh 12.18g (NH 4 ) 3 PO 4 , dissolved in 200mL deionized water to obtain a 0.3mol / L ammonium phosphate solution, and adjusted its pH to 11 with ammonia water;

[0052] (2) 0.9gAgNO 3 Add to dissolve in calcium nitrate solution, and add 35g diatomite, obtain diatomite mixed solution;

[0053] (3) Add the ammonium phosphate solution dropwise into the mixed solution of diatomaceous earth and stir continuously, then pour it into the reaction kettle for hydrothermal reaction, the reaction temperature is 160°C, pH=11, and the reaction time is 4h;

[0054] (4) Settling the reaction solution obtained in step (3) for 12 hours, discarding the supernatant, washing with deionized water and ethanol, and filtering 3 times until the filtrate is basically neutral (pH=6~8), at 80°C Dry to obtain dry powder;

[0055] (5) Mix dry powder and purple sand in a mas...

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Abstract

The invention relates to antibacterial filtering ceramic, in particular to in-situ composite antibacterial filtering ceramic as well as a preparation method and application thereof. The composite antibacterial filtering ceramic is prepared from the following components in percentage by mass: 60 to 75 percent of kieselguhr, 10 to 20 percent of hydroxyapatite, 10 to 30 percent of purple sand, 0.1 to 2 percent of silver and 1 to 5 percent of an adhesive, and the mass percentage sum of the five components is 100 percent. The diameter of the silver is 3 to 20 nm, and the silver is located on the surface and in gaps of the kieselguhr. According to the in-situ composite antibacterial filtering ceramic, combination of nano silveer and porous kieselguhr, combination of the silver and the hydroxyapatite and combination of silver-carried hydroxyapatite and the porous kieselguhr are realized under a hydrothermal condition, so that the dispersivity of the silver and the binding force of the silver and a material are improved. The material is high in filtering performance, antibacterial property and antibacterial endurance, can effectively filter out microorganisms, impurity particles and organic matters from water, and can be widely applied to the field of water treatment and relevant industries.

Description

technical field [0001] The invention relates to an antibacterial filter ceramic, in particular to an in-situ composite antibacterial filter ceramic and a preparation method and application thereof. Background technique [0002] With the improvement of people's living standards, improving drinking water quality and ensuring drinking water safety has become a topic of concern to all mankind. WHO survey results show that drinking contaminated water can lead to more than 50 diseases such as digestive tract diseases, skin diseases, infectious diseases, diabetes, cancer, and gallstones. At present, more than 90% of my country's urban waters are polluted to varying degrees, of which 78% of rivers do not meet sanitation standards, 75% of lakes are eutrophic, and 50% of urban groundwater is heavily polluted. Therefore, it is of great practical significance to purify drinking water. [0003] At present, most of the urban water plants in my country use conventional water treatment pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B38/08B01D39/20C02F1/00C02F1/50
CPCB01D39/2068B01D2239/0442C02F1/001C02F1/50C04B33/1305C04B33/131C04B38/085C04B2235/3418C04B2235/408C04B2235/447C04B38/0016
Inventor 漆小鹏邓城
Owner JIANGXI UNIV OF SCI & TECH
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