Method for preparing fluorescent silver nano particles based on silver mirror reaction
A silver nanoparticle, silver mirror reaction technology, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., to achieve the effect of convenient operation, avoiding the use of high temperature and high pressure and external reducing agents, and simple equipment
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Embodiment 1
[0025] (1) Take 0.06375g of silver nitrate in a clean beaker, add a small amount of distilled water to dissolve it completely, add concentrated ammonia water drop by drop until a brownish-yellow precipitate is formed, continue to add concentrated ammonia water until the precipitate is completely dissolved, and set the volume to 25mL to prepare 15 mmol L -1 of silver ammonia solution.
[0026] (2) Weigh 2.5 g of bovine serum albumin into a beaker, add water to dissolve it, and dilute it in a 50 mL volumetric flask to obtain a concentration of 50 mg mL -1 The bovine serum albumin solution, take 5 mL of the solution in four beakers, and then add 5 mL of the silver ammonia solution in step 1) respectively, and place them at 30, 40, 50, 60 o In a water bath of C, let it stand for 90 min. The reaction gave a light yellow solution, in which 30, 40 o The product under C is obviously turbid, 60 o The product at C was slightly cloudy.
[0027] (3) Transfer the above test solution t...
Embodiment 2
[0031] (1) Take 0.02125, 0.06375, and 0.10625 g of silver nitrate in a clean beaker, add a small amount of distilled water to dissolve it completely, add concentrated ammonia water drop by drop until a brownish-yellow precipitate is formed, continue to add concentrated ammonia water until the precipitate is completely dissolved, and set Volume up to 25mL, prepare 5, 15, 25 mmol L -1 of silver ammonia solution.
[0032] (2) Weigh 2.5 g of bovine serum albumin into a beaker, add water to dissolve it, and dilute it in a 50 mL volumetric flask to obtain a concentration of 50 mg mL -1 of bovine serum albumin solution, take 5 mL of this solution in a beaker, then add 5 mL of silver ammonia solution of different concentrations in step (1), and place it at 50 o In a water bath of C, let it stand for 90 min.
[0033] (3) Transfer the above test solution to a dialysis bag with a molecular weight cut off of 2000, and dialyze for 48 h. The dialyzed solution was taken on a molecular flu...
Embodiment 3
[0037] (1) Take 0.06375 g of silver nitrate in a clean beaker, add a small amount of distilled water to dissolve it completely, add concentrated ammonia water drop by drop until a brownish-yellow precipitate is formed, continue to add concentrated ammonia water until the precipitate is completely dissolved, and set the volume to 25 mL. Prepare 15 mmol L -1 of silver ammonia solution.
[0038] (2) Weigh 5.0 g bovine serum albumin into a beaker, add water to dissolve it, and then dilute it in a 50 mL volumetric flask to obtain a concentration of 100 mg mL -1 of bovine serum albumin solution, take 5 mL of this solution in a beaker, then add 5 mL of silver ammonia solution of different concentrations in step (1), and place it at 50 o In a water bath of C, let stand to react for 120 min.
[0039] (3) Transfer the above test solution to a dialysis bag with a molecular weight cut off of 2000, and dialyze for 48 h. The dialyzed solution was taken on a molecular fluorescence spectro...
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