Silver-loaded diatom shell antibacterial ceramic filter core and preparation method thereof

A technology of silver diatom frustule and antibacterial ceramics, which is applied in the field of silver-loaded diatom frustule antibacterial ceramic filter element and its preparation, which can solve the problems of serious damage to porous structure, low compressive strength of ceramic filter element, reduced antibacterial and water purification performance, etc. , to meet the requirements of green environmental protection and ecology, improve the effect of water purification, and the effect of excellent adsorption performance

Inactive Publication Date: 2020-11-17
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method adopts the process of first making the billet and then sintering the molding. The sintering temperature is as high as 1050°C, which not only leads to low compressive strength of the prepared ceramic filter element, but also seriously destroys the porous structure of diatomite in the ceramic filter element, reducing the antibacterial and cleaning properties. water performance

Method used

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  • Silver-loaded diatom shell antibacterial ceramic filter core and preparation method thereof
  • Silver-loaded diatom shell antibacterial ceramic filter core and preparation method thereof

Examples

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Embodiment 1

[0069] This embodiment provides a method for preparing a silver-loaded diatom frustule antibacterial ceramic filter element, the preparation method comprising the following steps:

[0070] (1) In terms of mass percentage, weigh 90% of silver-loaded diatom frustules, 4% of carbon powder as porogen, 4% of alumina powder as sintering aid, and hydroxymethyl cellulose as adhesive 2% raw material particles were mixed, and then ball milled at a speed of 300 rpm for 2 hours to obtain a mixed powder with a particle size of <45 μm;

[0071] Wherein, the preparation method of the silver-loaded diatom frustule includes: first soaking the diatom frustule produced by Shenzhen Taili Energy Company in a hydrochloric acid solution with a mass concentration of 5% for 3 hours, and then washing the filtered diatom frustule with water to pH =6.5~7.5, then dried at 70°C for 2h; then calcined in an air atmosphere at 600°C for 2h; then immersed the calcined diatom frustules in a silver nitrate soluti...

Embodiment 2

[0075] This example provides a method for preparing a silver-loaded diatom frustule antibacterial ceramic filter element, except that the temperature of hot pressing and sintering in step (3) is replaced by "900°C" from "800°C", other conditions are the same as in Example 1 exactly the same.

Embodiment 3

[0077] This example provides a method for preparing a silver-loaded diatom frustule antibacterial ceramic filter element, except that the temperature of hot pressing and sintering in step (3) is replaced by "500°C" from "800°C", other conditions are the same as in Example 1 exactly the same.

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Abstract

The invention relates to a silver-loaded diatom shell antibacterial ceramic filter core and a preparation method thereof. The preparation method comprises the steps: sequentially carrying out mixing,grinding, liquid phase mixing and drying on raw material particles containing a silver-loaded diatom shells, and then carrying out hot pressing sintering to obtain the silver-loaded diatom shell antibacterial ceramic filter core. Different from a process of preparing a blank firstly and then sintering and molding in the prior art, the preparation method disclosed by the invention has the advantages that hot pressing sintering treatment is carried out at the same time of pressing and sintering, so that the sintering temperature is relatively low, the porous structure of the silver-loaded diatomshell can be prevented from being damaged, and the compressive strength of the ceramic filter core can be greatly improved; and the prepared silver-loaded diatom shell antibacterial ceramic filter core has the nano-silver loading capacity of 0.15-0.4%, has excellent adsorption performance, has the filtering precision as high as 10-100 microns and the specific surface area of 65 m<2>/g, also has sterilization and inactivation effects, ensures the water quality safety of domestic water, prolongs the service life of the ceramic filter core, and further improves the market competitiveness of theproduct.

Description

technical field [0001] The invention relates to the technical field of domestic water purification, in particular to a silver-loaded diatom shell antibacterial ceramic filter element and a preparation method thereof. Background technique [0002] With the improvement of people's quality of life, people's standards for drinking water are getting higher and higher. Not only are drinking water required to be non-toxic, harmless, and odor-free, but they must also contain certain minerals and trace elements, so that people can drink directly. And good for health. However, with the aggravation of water pollution, obtaining safe water has become a worldwide problem, especially microorganisms such as viruses and bacteria in water, even if the content is very small, once they enter the human body, they will induce various diseases. Traditional drinking water purifiers are mainly chlorine and hypochlorous acid. Although they have a good effect on killing microorganisms such as bacter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/645C04B35/622C04B35/14B01D39/20C02F1/28C02F1/50C02F101/20C02F101/30
CPCC04B38/068C04B35/14C04B35/622C04B35/645B01D39/2068C02F1/001C02F1/281C02F1/50C02F2101/20C02F2101/30C04B2235/5436C04B2235/408C04B2235/602C04B2235/656C04B2235/6562C04B2235/96C04B2235/95
Inventor 孙大陟吕沙王炎菁黄锦涛李丹丹余鹏王兆凯张江涛
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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