Nanometer silver-loaded active carbon and preparation method thereof

A technology of activated carbon and nano-silver, applied in the field of activated carbon, can solve the problems of detachment of nano-silver, unsuitable for purifying drinking water, unstable structure, etc., and achieve the effect of improving water quality, prolonging the life of sterilization and purification, and good purification effect.

Active Publication Date: 2013-08-07
SHENZHEN PANGU ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent documents CN101642652A, CN11376822A and CN1726782A all have records that activated carbon and nano-silver are combined to obtain materials and preparation methods thereof, but it is not difficult to find out from the contents recorded in the documents, especially the preparation methods, that the activated carbon in the above-mentioned materials Combined with nano-silver only by physical adsorption, nano-silver is only adsorbed on the surface of activated carbon, the composite structure is not stable, nano-silver is easy to detach from the surface of activated carbon, not suitable for purifying drinking water

Method used

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  • Nanometer silver-loaded active carbon and preparation method thereof
  • Nanometer silver-loaded active carbon and preparation method thereof
  • Nanometer silver-loaded active carbon and preparation method thereof

Examples

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Embodiment 1

[0043] Take 500g of rice husk and carbonize at 500°C for 2h and activate at 700°C for 1h to obtain rice husk activated carbon, add it to 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 , stirring and mixing for 2 hours, adding 20g of D-glucose, stirring and mixing for 1 hour, and reducing the monovalent silver to zero-valent nano-silver, thereby obtaining activated carbon loaded with nano-silver.

Embodiment 2

[0045] Take 500g of rice husk and carbonize at 600°C for 3h, activate at 800°C for 2h to get rice husk activated carbon, add it to 1L of deionized water, adjust the pH value to 10, add 10g of silver perchlorate and 2g of polyvinylpyrrolidone at the same time, stir and mix for 2h , add 20g of sodium borohydride, stir and mix for 1h, and reduce monovalent silver to zero-valent nano-silver, thereby obtaining activated carbon loaded with nano-silver.

Embodiment 3

[0047] Take 500g of rice husk and carbonize at 600°C for 3h to obtain rice husk activated carbon, add it into 1L of deionized water, adjust the pH value to 11, add 20g of silver chloride and 10g of sodium citrate at the same time, stir and mix for 3h, add 20g of ascorbic acid, stir After mixing for 1 hour, the monovalent silver is reduced to zero-valent nano-silver, thereby obtaining activated carbon loaded with nano-silver.

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Abstract

The invention discloses nanometer silver-loaded active carbon and a preparation method thereof, and relates to the field of active carbon. A purpose of the present invention is to provide a method for effectively loading nanometer silver on active carbon by using a chemical method, and the nanometer silver-loaded active carbon. The invention provides a nanometer silver-loaded active carbon preparation method, which is characterized by comprising: adding active carbon to deionized water, adjusted the pH value to 9-11, adding a monovalent silver compound and a complexing agent, uniformly stirring and mixing, adding a chemical reduction agent, and carrying out a complete reaction to obtain the nanometer silver-loaded active carbon. The preparation method has advantages of simple process, simple operation and management, cheap and easily available chemicals, and the like. According to the present invention, the chemical method is adopted to effectively load the nanometer silver on the active carbon in a chemical absorption manner, the immobilized nanometer silver can maintain a nanometer size for a long time, and the nanometer silver-loaded carrier material is easily separated from the water.

Description

technical field [0001] The invention relates to activated carbon, in particular to an activated carbon loaded with nano-silver generated by chemical reaction and a preparation method thereof. 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 improvement, drinking water, and centralized water supply project...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C02F1/28C02F1/50C01B32/354
Inventor 赵建树何頔徐剑晖
Owner SHENZHEN PANGU ENVIRONMENTAL PROTECTION TECH CO LTD
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