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Nano-silver-particle-embedded porous ceramic sheet as well as preparation method and application thereof

A technology of nano-silver particles and porous ceramics, which is applied in the field of drinking water disinfection technology and ceramic water purification, which can solve the problems of affecting the utilization efficiency of raw materials, the functional efficiency of water purification materials, the loss of anions, nano-silver, secondary pollution, etc., and achieve the saving of silver consumption , not easy to fall off, ensure the effect of stability

Inactive Publication Date: 2015-05-06
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods or processes are likely to cause secondary pollution, loss of anions and instability of nano-silver, etc., which affect the utilization efficiency of raw materials and the functional efficiency of water purification materials.

Method used

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  • Nano-silver-particle-embedded porous ceramic sheet as well as preparation method and application thereof
  • Nano-silver-particle-embedded porous ceramic sheet as well as preparation method and application thereof
  • Nano-silver-particle-embedded porous ceramic sheet as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of porous ceramic water purification material: Prepare 62.5g of the mixture with a mixing ratio of clay and wood chips of 9:1. The characteristics of the clay used are: the clay is purchased from Sigma-Aldrich Company, and its main components are kaolinite and illite , the particle size distribution of the clay is that the particles 20μm respectively account for 28wt%, 56wt%, and 16wt%; in addition, the sawdust is obtained by passing through a 20-mesh sieve. Add the mixture of clay and sawdust to 19.2ml of silver nitrate solution with a concentration of 1.3mol / L, and disperse the mixture with ultrasonic wave for 1-2h, then stir evenly, fix the mixture into a disc with a diameter of 80mm and a thickness of 30mm with a manual hydraulic press, and Air dry at room temperature for 72 hours. Then place the wafer in a kiln and raise the temperature to 600°C at 2.5°C / min, then raise the temperature to 900°C at 5°C / min, and then keep it warm for 3 hours to obtain Mat...

Embodiment 2

[0037] It is basically the same as Example 1, except that the mass of silver nitrate added to the mixture is 1 g, and the prepared material is marked as material 3.

[0038] It is basically the same as Example 1, except that the mixture is fixed into a disc with a diameter of 80 mm and a thickness of 20 mm by a manual hydraulic press, and the prepared material is designated as Material 4.

[0039]Sterilization test: The three porous ceramic water purification materials (material 1, material 3 and material 4) prepared above were used to kill Escherichia coli in water. Add three different porous ceramic water purification materials into the phosphate buffer solution containing 200mL E. coli respectively, wherein the concentration of phosphate buffer is 10mmol / L and the concentration of E. coli is 10 7 cfu / L. Samples were taken according to the set time, and the number of E. coli and the concentration of silver ions were measured. For relevant test results, see image 3 . The ...

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Abstract

The invention discloses a nano-silver-particle-embedded porous ceramic sheet as well as a preparation method and an application thereof. The preparation method comprises the following steps of mixing sawdust and clay with mass percentage of 11-13% into a silver nitrate solution to obtain a mixture, firstly carrying out ultrasonic dispersion on the mixture for 1-2 hours, uniformly stirring, fixing the mixed system to a wafer, carrying out air-drying for 70-80 hours at room temperature, placing the wafer in a kiln, heating the wafer at a heating speed of 2.5 DEG C / min to 600 + / - 20 DEG C and at a heating speed of 5 DEG C / min to 900 + / - 20 DEG C and carrying out heat preservation for 3-4 hours. The nano-silver-particle-embedded porous ceramic sheet prepared by the preparation method has the advantages of larger surface area, good firmness with nano silver particles, the material has good and stable bacteria-killing capability, the removal rate of microorganisms in water can reach above 99% and the ceramic sheet can be used as an alternative technology and method of family water purification.

Description

technical field [0001] The invention relates to the fields of drinking water disinfection technology and ceramic water purification technology, in particular to a porous ceramic sheet embedded with nano-silver particles and its preparation method and application. Background technique [0002] The problem of drinking water has become a global concern. According to statistics, more than 1.8 million people around the world die from diseases related to unsafe drinking water and water pollution every year, and about 780 million people lack clean water sources for drinking water. The World Health Organization (WHO) recommends that appropriate in-situ treatment methods can effectively solve household drinking water problems. Studies have shown that on-site treatment of household drinking water is effective in improving drinking-water safety compared to at-source treatment, but this is dependent on user compliance. Therefore, practicality, affordability, and stability become key fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/13
Inventor 田爱军吴云波毛凯刘建孙兆海黄娟
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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