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Nano silver-containing trimolybdate and preparation method and use thereof as antibacterial agent

A technology of silver trimolybdate and antibacterial agent is applied in the field of synthesis of nanomaterials, which can solve the problems of increasing process cost and production cycle, and achieve the effects of enhanced antibacterial ability, cost saving and less antibacterial agent.

Inactive Publication Date: 2012-01-04
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional process, the preparation of antibacterial agents requires mechanical grinding of the product to meet the small size requirements. After grinding, the particle size reaches the order of several microns. To achieve the smaller size requirements, other process costs and production cycles need to be greatly increased.

Method used

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  • Nano silver-containing trimolybdate and preparation method and use thereof as antibacterial agent
  • Nano silver-containing trimolybdate and preparation method and use thereof as antibacterial agent
  • Nano silver-containing trimolybdate and preparation method and use thereof as antibacterial agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of silver-containing trimolybdate nanowires

[0026] Including the following steps:

[0027] 1. Mix 1.2 g (NH 4 ) 6 Mo 7 o 24 4H 2 O (purity: 99.999%) was put into a beaker, and 16 ml of deionized water was added, heated in a water bath to 90°C, stirred evenly, and dissolved, and then 0.4 g of AgNO 3 (purity: 99.999%) was put into a beaker, 4 ml of deionized water was added, heated to 90°C in a water bath, stirred evenly, and dissolved.

[0028] 2. Mix the two solutions prepared in step 1 at room temperature and normal pressure, and keep stirring for 1 to 5 minutes. From the time of mixing, the solution changed from clear to turbid, indicating that the target product containing silver trimolybdate nanowires began to be generated. The molecular formula is (NH 4 ) 2-x Ag x Mo 3 o 10 , where x=0.58.

[0029] 3. Suction filter the suspension obtained in step 2 with deionized water, and wash to remove impurities.

[0030] 4. After drying, ...

Embodiment 2

[0033] 1. Mix 1 gram (NH 4 ) 6 Mo 7 o 24 4H 2 O (purity: 99.999%) was put into a beaker, and 16 ml of deionized water was added, stirred evenly to dissolve it, and then 10 g of AgNO 3 (purity: 99.999%) was put into a beaker, and 4 ml of deionized water was added, stirred evenly, and dissolved.

[0034] 2. Stir the two solutions in step 1 at room temperature and normal pressure for 5 hours to fully grow the silver-containing trimolybdate nanowires.

[0035] 3. After drying, the final product, silver-containing trimolybdate nanowires that are not easily soluble in water, is obtained.

[0036] The thickness of the nanowires obtained by the method of this embodiment is more uniform, and the aspect ratio is larger. visible figure 2 , the diameter of the nanowire is in the range of 40-100 nanometers, and the length is in the order of 100 micrometers.

Embodiment 3

[0038] 1. Mix 0.4 g (NH 4 ) 6 Mo 7 o 24 4H 2 O (purity: 99.999%) was put into a beaker, 16 ml of deionized water was added, heated in a water bath to 70°C, stirred evenly to dissolve it, and then 1.2 g of AgNO 3 (purity: 99.999%) was put into a beaker, heated to 70° C. in a water bath, 4 ml of deionized water was added, stirred evenly, and dissolved.

[0039] 2. Stir the two solutions in step 1 at room temperature and normal pressure for 1 hour to fully grow the silver-containing trimolybdate nanowires.

[0040] 3. Centrifuge and wash the suspension obtained in step 2 with deionized water to remove impurities.

[0041] 4. After drying, the final product, silver-containing trimolybdate nanowires that are not easily soluble in water, is obtained.

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Abstract

The invention discloses nano silver-containing trimolybdate and a preparation method and use thereof as an antibacterial agent. The molecular formula of the silver-containing trimolybdate is (NH4)2-xAgxMo3O10, wherein x is equal to 0.58, and the silver-containing trimolybdate is a nanowire. The silver-containing trimolybdate is prepared by reacting ammonium heptamolybdate tetrahydrate with a silver salt in water. The invention also discloses the use of the silver-containing trimolybdate nanowire as the antibacterial agent. The use of the silver-containing trimolybdate nanowire as the antibacterial agent, which is disclosed by the invention, does not require grinding. The silver content in silver-containing trimolybdate is high, so the required amount for achieving the same antibacterial effect is small; meanwhile, the molybdenum compound also has an antibacterial function, oxy-acid radicals containing a positive hexavalent molybdenum element in the solution also have certain oxidability, and thus, the molybdenum element can promote the antibacterial effect of the silver ions; therefore, the nano silver-containing trimolybdate has double antibacterial effects, and the antibacterial capacity of the nano silver-containing trimolybdate is 1,000 times that of a micrometer antibacterial agent. The preparation method disclosed by the invention is simple, has low equipment condition requirements, reduces reaction time and is suitable for large-scale production.

Description

technical field [0001] The invention relates to an inorganic nano material, in particular to a nano silver-containing trimolybdate and a preparation method thereof, and the application of the nano silver-containing trimolybdate as an antibacterial agent, belonging to the synthesis field of nano materials. Background technique [0002] The preparation of nanomaterials is a hot spot in scientific research. Although there are many methods to obtain nanomaterials, such as template method, chemical vapor deposition method, electrochemical method, hydrothermal method, liquid phase synthesis method, etc., these methods are generally equipped with Complex and difficult to prepare. In the field of antibacterial materials, nano antibacterial materials have the advantages of large specific surface area and high surface state activity, and their effective antibacterial ability is 3 orders of magnitude higher than that of the same micron antibacterial materials. In the traditional proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/00B82Y40/00A01N59/16A01P1/00
Inventor 薛炯微蒋玉洁叶剑文吴修栋许胜勇
Owner PEKING UNIV
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