A kind of preparation method of dendritic silver
A technology of dendritic silver and silver salt, which is applied in the field of nano-metal material preparation, and achieves the effects of simple preparation process, mild reaction conditions and easy operation
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[0029] By providing a preparation method of dendritic silver, the present invention solves the defects in the prior art that the method for preparing dendritic silver is complex and uses too many materials. The preparation method is simple and effective without introducing other reducing agents or additives.
[0030] In order to solve the above technical problems, the main ideas of the embodiments of the present invention are as follows:
[0031] Such as figure 1 As shown, the present invention adopts following technical scheme: a kind of preparation method of dendritic silver comprises the steps:
[0032] S01: providing a first solution, wherein the first solution comprises agarose dispersed in a first solvent;
[0033] S02: providing a second solution, wherein the second solution comprises a silver salt dispersed in a second solvent;
[0034] S03: mixing the first solution and the second solution, cooling and standing to obtain an agarose / nano-silver composite gel; and
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Embodiment 1
[0044] The preparation method of dendritic silver in Example 1 of the present invention comprises the following steps: Weighing 0.15 g of agarose powder and adding it into 9.9 mL of deionized water, heating and stirring to dissolve the agarose powder to form a transparent and uniform solution. Add 0.1 mL of silver nitrate solution with a concentration of 0.5 M to the above solution, and stir at a constant temperature of 80° C. for 120 min. After stopping the heating, the solution was allowed to cool naturally to form a gel. Insert a layer of aluminum foil in the middle of the above gel, and after standing at a constant temperature at 30°C for 2 days, dendritic silver can be obtained. By comparing the composite gel before and after adding aluminum foil, it can be seen that the silver-white substance that grows concentratedly at the contact point of aluminum foil / gel in the gel is dendritic silver.
Embodiment 2
[0046] The preparation method of dendritic silver in Example 2 of the present invention comprises the following steps: weighing 0.08 g of agarose powder and adding it into 9.8 mL of deionized water, heating and stirring to dissolve the agarose powder to form a transparent and uniform solution. Add 0.2 mL of silver nitrate solution with a concentration of 0.5 M to the above solution, and stir at a constant temperature of 100° C. for 45 min. After stopping the heating, the solution was allowed to cool naturally to form a gel. Lay aluminum foil on the upper and lower sides of the above-mentioned gel, and place it at 30°C for 1 day to obtain dendritic silver. Figure 2a Add aluminum foil and place the composite gel physical figure after placing 1d for embodiment 2, Figure 2b It is the optical microscope picture of the composite gel after adding aluminum foil and placing it for 1d in Example 2. In figure 2a, small dendrites of silver are scattered and grown in the gel in contact w...
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Abstract
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