Silver nano-sheet and low temperature preparation method thereof
A technology of silver nanosheets and low temperature, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of no verification, less defects, and the preparation of metal nanostructures
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Embodiment 1
[0022] Under the condition of sufficient light, the room temperature is 16±1°C. When the temperature of the low-temperature reaction tank is stabilized at 0±0.02°C, place the reaction bottle containing 15ml of sodium dodecyl sulfate (SDS) aqueous solution with a concentration of 0.005mol / L in the Stir in the reaction tank at 700 rpm for 15-20 min, and take 49 μl successively at a concentration of 5×10 -4 mg / ml of sodium alginate (Alg) aqueous solution, 0.4ml of silver nitrate solution with a concentration of 0.01mol / L and 0.1ml of ascorbic acid (AA) with a concentration of 0.1mol / L were added to the reaction bottle and continued to stir for 1.5h. Centrifuge at a speed of 5000 rpm for 10-15 minutes, remove the supernatant, add an equal volume of aqueous solution to maintain the same speed and time for a second centrifugation, remove the supernatant again, and the lower precipitate is the reaction product, add a certain amount of aqueous solution to dissolve It is kept dispersed...
Embodiment 2
[0025] Prepare hexagonal silver nanosheets using substantially the same method steps as in Example 1, the difference is that the amount of sodium alginate is 50 μl, and the reaction time is 2h, and the length of opposite sides of hexagonal silver nanosheets can be prepared to be 350nm ~500nm, and will be accompanied by a tail-like structure of 200~300nm, the morphology of the scanning electron microscope is as follows Figure 4 As shown in (a), it is obvious that the high yield of silver nanosheets is accompanied by only a few large by-product particles.
Embodiment 3
[0027] Prepare hexagonal silver nanosheets using substantially the same method steps as in Example 1, the difference is that the amount of sodium alginate is 100 μl, and the reaction time is 3h, and the length of opposite sides of hexagonal silver nanosheets can be prepared as 400nm ~600nm, and will be accompanied by a tail-like structure of 300~700nm, the morphology of the scanning electron microscope is as follows Figure 4 (b) shown.
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