Novel method for preparing micro-nano multivalent silver by soft chemistry technology

A multivalent silver, micro-nano technology, applied in chemical instruments and methods, botanical equipment and methods, chemicals for biological control, etc., can solve problems such as waste, large water consumption, difficult industrial application, etc., and achieve distribution Uniform, well-exchanged, synthetically efficient results

Inactive Publication Date: 2010-12-29
DONGHUA UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But above-mentioned synthetic method water consumption is big, and waste is serious, is difficult to industrialized application

Method used

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  • Novel method for preparing micro-nano multivalent silver by soft chemistry technology
  • Novel method for preparing micro-nano multivalent silver by soft chemistry technology
  • Novel method for preparing micro-nano multivalent silver by soft chemistry technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0022] Implementation Case 1: Synthesis of Micro-nano Multivalent Silver Oxide by Rheological Phase Method and Determination of Antibacterial Properties

[0023] 1. Weigh 2.4g oxidant sodium persulfate, 2.4g sodium hydroxide and 1.4g silver nitrate, put them into a mortar, grind them evenly, add 3ml deionized water, keep warm at 90°C for 20min, filter, and rinse with pure water for four times to remove potassium sulfate (sodium) and potassium nitrate (sodium) and other impurities. After drying, 0.8788 g of black powder (polyvalent silver oxide) was obtained.

[0024] 2. Take 0.2g of micro-nano multivalent silver oxide powder, add 2ml of 25% concentrated ammonia water, 8ml of distilled water, and stir at room temperature for 5-10min until it is completely dissolved.

[0025] 3. Take 2.5 μl of the above-mentioned 2% micro-nano multivalent silver oxide sample stock solution and add it to 100ml distilled water (the bacteria content is greater than 100,000cpu / cc, the test bacteria...

Embodiment example 2

[0027] Implementation Case 2: Synthesis of micro-nano polyvalent silver oxides by rheological phase method

[0028] 1. Weigh 2.4g of oxidant sodium persulfate and 2.4g of sodium hydroxide, put them into a mortar and grind them evenly.

[0029] 2. Weigh 1.4g of silver nitrate, completely dissolve it in 3ml of deionized water, mix it into the above solid powder, and quickly adjust it into a rheological state.

[0030] 3. Incubate at 90°C for 20 minutes, filter, and rinse with pure water four times to remove potassium sulfate (sodium) and potassium nitrate (sodium) and other impurities. After drying, 0.9503 g of black powder (polyvalent silver oxide) was obtained.

[0031] 4. Take an appropriate amount of the above-mentioned black powder for analysis, and the characterization of the product results is shown in the attached figure.

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Abstract

The invention discloses a novel method for preparing micro-nano multivalent silver oxides by soft chemistry synthesis. The micro-nano multivalent silver oxides are chemical substances which have excellent killing effect on microorganisms and tumor cells. The method for preparing micro-nano disinfectants comprises the following steps of: uniformly mixing an oxidant potassium persulfate or sodium persulfate, sodium hydroxide and silver nitrate according to a ratio of 2.4-9:4.8-6:5-20, putting into a reactor, adding a proper amount of distilled water, adjusting into a rheologic state, reacting at the temperature of between 80 and 100 DEG C for 10 to 30 minutes, filtering, and washing with purified water for four times to obtain micro-nano multivalent silver particles. The product synthesized by the method has the advantages of uniform size, simple production process, high efficiency, remarkable killing effect on various microorganisms, and safety to the environment and human.

Description

technical field [0001] The invention belongs to the field of micro-nano materials and inorganic green chemical synthesis, and specifically relates to a method for efficiently synthesizing micro-nano polyvalent silver by a soft chemical method. Background technique [0002] Silver has been known as a fungicide since 2,000 years ago. According to experiments, researchers have determined the relative potency of different metal antibacterial potencies, and the arrangement is as follows: [0003] Ag>Hg>Cu>Cd>Ni>Co>Zn>Fe>Ca [0004] Silver participates in the bactericidal activity and also has different valence forms, Ag 4 o 4 As a new type of microbial fungicide, it was published in soap cosmetics chemical specialties, volume 72, No. 3, page 52-59 in 1994. This article shows the excellent bactericidal performance of the substance. And through research, it is proposed that different valences of silver have different bactericidal properties, and their rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00C01G5/00
Inventor 张兴群曹张军许晓东
Owner DONGHUA UNIV
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