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Nanosilver-loaded organic functional silica, preparation method thereof and application thereof

A silicon dioxide, functionalized technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc., can solve the problems of weak complexing ability, difficulty in ensuring silver release, etc., and achieve simple operation and management. , prolong the life of sterilization water purification, the effect of simple process

Inactive Publication Date: 2013-03-20
赵建树 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the weak complexation ability of nano-silver and unmodified silica, it is difficult to ensure that the release of silver is below the prescribed health threshold

Method used

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  • Nanosilver-loaded organic functional silica, preparation method thereof and application thereof
  • Nanosilver-loaded organic functional silica, preparation method thereof and application thereof
  • Nanosilver-loaded organic functional silica, preparation method thereof and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Take 500g of rice husk and calcinate at 500°C for 2h to obtain rice husk ash, add it into 1L of deionized water, adjust the pH value to 9, add 10g of silver nitrate and 0.5L of ammonia water (w / v 28%) at the same time, stir and mix for 2h, The organic functionalized silicon dioxide loaded with nano-silver is obtained.

Embodiment 2

[0041] Take 500g of rice husk and calcinate at 600°C for 3h to obtain rice husk ash, add it into 1L of deionized water, adjust the pH value to 10, add 10g of silver nitrate and 2g of polyvinylpyrrolidone at the same time, stir and mix for 2h, and obtain nano-silver-loaded organic Functionalized silica.

Embodiment 3

[0043] Add 500g of 3-carboxypropyl functionalized silica to 1L of deionized water, adjust the pH value to 10, add 20g of silver nitrate and 10g of sodium citrate at the same time, stir and mix for 3h, and obtain organic functionalized silica loaded with nano silver .

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Abstract

The present invention relates to nanosilver-loaded organic functional silica, a preparation method thereof and application thereof, and belongs to the field of silica materials. The first object of the present invention is to provide a method effectively loading nanosilver on organic functionalized silica, including: adding organic functionalized silica to deionized water, adjusting the pH value at 9-11, adding a monovalent state silver compound and a complexing agent, and stirring and mixing for 2-8h, wherein the adding amount of the organic functionalized silicon material is 1-500g / L, the adding amount of a monovalent state silver compound is 0.1-100g / L, and the adding amount of the complexing agent is 0.1-200g / L. The second object of the present invention is to provide nanosilver-loaded organic functionalized silica prepared by the above preparation method. The third object of the present invention is to provide the application of nanosilver-loaded organic functionalized silica in the purification of drinking water. The present invention can be filled into a microporous filter to be used as a water purifier.

Description

technical field [0001] The invention relates to the field of silicon dioxide materials, in particular to organic functionalized silicon dioxide loaded with nanometer silver, its preparation method and its application in drinking water purification. Background technique [0002] "China Youth Daily" reported in May 2012 that the drinking water of China's approximately 300 million rural population and 50 million urban population still does not meet safety standards. The "2010 China Rural Poverty Monitoring Report" shows that as of 2009, only 32% of all rural households drink tap water, and the rest of the rural households who drink directly from water sources all suffer from varying degrees of health problems. Due to the lack of centralized water supply in rural areas, water pollution caused by industrial and mining enterprises, and the government's insufficient publicity on drinking water safety, water-borne diseases frequently occur in rural areas. Since rural water improvem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50C02F1/28C02F1/62
Inventor 何頔
Owner 赵建树
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