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A method for preparing fluorescent silver nanoparticles based on silver mirror reaction

A technology of silver nanoparticle and silver mirror reaction, which is applied in nanotechnology, metal processing equipment, transportation and packaging, etc., to avoid the use of high temperature and high pressure and additional reducing agent, good fluorescence characteristics, and convenient operation

Active Publication Date: 2020-03-13
山西奇色环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are reports on the preparation of silver nanoparticles with silver ammonia solution as the source of silver element, there is no report on the one-step synthesis of fluorescent silver nanoparticles without adding a reducing agent.

Method used

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  • A method for preparing fluorescent silver nanoparticles based on silver mirror reaction
  • A method for preparing fluorescent silver nanoparticles based on silver mirror reaction
  • A method for preparing fluorescent silver nanoparticles based on silver mirror reaction

Examples

Experimental program
Comparison scheme
Effect test

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 mmolL -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 spectrom...

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Abstract

The invention discloses a method for preparing fluorescent silver nanoparticles based on silver mirror reaction. The method comprises the following steps: the preparation concentration is 5 ~ 25 mmol L ‑1 silver ammonia solution; put bovine serum albumin solution in a beaker, then add silver ammonia solution, place it in a water bath, and let it stand for reaction; transfer the reacted test solution to a dialysis bag with a molecular weight cut-off of 2000, and dialyze for 36-48 hours; The dialyzed test solution was centrifuged and centrifuged at 10000-12000 rpm for 10-20 min to obtain a silver nanoparticle dispersion. The method of the present invention selects bovine serum albumin as a template and a reducing agent, and prepares silver nanoparticles by reducing silver ammonia in situ based on the silver mirror reaction principle. The reaction conditions are mild, the equipment is simple, the operation is convenient, no additional reducing agent is needed, and the advantages are green and fast. The resulting silver nanoparticles exhibit fluorescent properties.

Description

technical field [0001] The invention relates to a method for preparing fluorescent silver nanoparticles based on silver mirror reaction, and belongs to the technical field of nanomaterial preparation. Background technique [0002] Due to its excellent electronic, optical, catalytic, and antibacterial properties, silver nanoparticles have been widely studied in the fields of chemistry, materials, environment, medicine, and life sciences. Fluorescent silver nanoparticles have good anti-photobleaching and biocompatibility, so they can be widely used in metal ion, biomolecular detection and imaging research. Therefore, the preparation of fluorescent silver nanoparticles is of great significance. [0003] Compared with traditional physical and chemical synthesis methods, the biological template method avoids the use of complex and expensive equipment and high-temperature and high-pressure conditions that consume energy, and has the advantages of being green, low-consumption, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F2009/245B22F1/054
Inventor 马春蕾王琦唐建可
Owner 山西奇色环保科技股份有限公司
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