Water phase preparation method of spherical silver nanoparticle with adjustable size

A technology for the preparation of silver nanoparticles and aqueous phase, which is applied in the field of aqueous phase preparation of spherical silver nanoparticles, can solve the problems affecting the size uniformity of silver nanoparticles, and achieve the effect of uniform size and narrow size distribution

Inactive Publication Date: 2012-09-19
THE SECOND AFFILIATED HOSPITAL OF NANJING MEDICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high reactivity of silver precursors such as silver nitrate in the aqueous phase, even under the action of a strong reducing agent, the small-sized silver nanoparticles formed still have a wide size distribution, which directly affects the subsequent growth of silver nanoparticles. uniformity of size

Method used

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  • Water phase preparation method of spherical silver nanoparticle with adjustable size
  • Water phase preparation method of spherical silver nanoparticle with adjustable size
  • Water phase preparation method of spherical silver nanoparticle with adjustable size

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preparation example Construction

[0037] Such as figure 1 Shown, the aqueous phase preparation method of a kind of size-adjustable spherical silver nanoparticles of the present invention, this preparation method comprises the following steps:

[0038] 10. Preparation of the silver "seed" solution involves the following steps:

[0039] 101. Mix 60-80 mL of deionized water with 20 mL of sodium citrate solution with a mass volume ratio of 1%, and stir evenly to form a stabilizer solution;

[0040] 102. In a water bath at 70-80 oC, heat the stabilizer solution prepared in step 101 to the temperature of the water bath, and then add 1.7 mL of AgNO with a mass volume ratio of 1% to the stabilizer solution. 3 solution, under the stirring of a mechanical stirring bar, add 1.5 to 2.5 mL of NaHB with a mass volume ratio of 0.1% to the stabilizer solution 4 solution, and stirred for 60 min -120 min;

[0041] 103. After cooling the solution prepared in step 102 to room temperature, dilute to 100 mL with deionized wate...

Embodiment 1

[0054] A water-phase preparation method of size-adjustable spherical silver nanoparticles, the preparation method comprising the following steps:

[0055] 10. Preparation of the silver "seed" solution involves the following steps:

[0056] 101. Mix 80 mL of deionized water with a resistivity of 18.0 M cm cm with 20 mL of a sodium citrate solution with a mass volume ratio of 1%, and stir evenly to form a stabilizer solution;

[0057] 102. In a water bath at 80 oC, heat the stabilizer solution prepared in step 101 to the temperature of the water bath, and then add 1.7 mL of AgNO with a mass volume ratio of 1% to the stabilizer solution 3 solution, under stirring with a mechanical stirring bar, add 2 mL of NaHB with a mass volume ratio of 0.1% to the stabilizer solution 4 solution, and stirred for 100 min;

[0058] 103. After cooling the solution prepared in step 102 to room temperature, dilute to 100 mL with deionized water to prepare a silver "seed" solution.

[0059] 20. ...

Embodiment 2

[0064] The steps are the same as in Example 1, except that after step 202 and before step 203, steps 2021, 2022 and 2023 are added; wherein:

[0065] Step 2021: After cooling the solution prepared in step 202 to room temperature, dilute it to 100 mL with deionized water to prepare a spherical silver nanoparticle solution;

[0066] Step 2022: Add 80 mL of deionized water to the flask equipped with a condenser tube, then add 2 mL of sodium citrate solution with a mass volume ratio of 1% to the deionized water to form a reducing agent solution, and heat the reducing agent solution to boiling state;

[0067] Step 2023: While the condenser tube is kept in the reflux state, add 10 mL of the spherical silver nanoparticle solution prepared in step 2021 to the reducing agent solution prepared in step 2022, and add 1.7 mL of the solution with a mass volume ratio of 1% during stirring with a stirring bar AgNO 3 solution, keep stirring and boiling for 90 min.

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Abstract

The invention discloses a water phase preparation method of a spherical silver nanoparticle with adjustable size, which comprises the following steps of: 10, preparing a silver seed solution : 101, mixing deionized water with a sodium citrate solution, and obtaining a stabilizer solution after stirring; 102, heating the stabilizer solution to the temperature of water bath, adding an AgNO3 solution, and then adding a NaHB4 solution; and 103, utilizing the deionized water to obtain a constant volume after cooling at room temperature, and obtaining the silver seed solution; 20, preparing the spherical silver nanoparticle: 201, adding deionized water to a flask, then adding sodium citrate solution to obtain a reducer solution, and heating the reducer solution to a boiling state; 202, adding the silver seed solution to the reducer solution, and then adding the AgNO3 solution; and 203, cooling at room temperature to obtain the spherical silver nanoparticle. The preparation method can be used for preparing the spherical silver nanoparticle with favorable monodispersity, and the size of the spherical silver nanoparticle can be adjusted.

Description

technical field [0001] The invention relates to a preparation method of spherical silver nanoparticles, in particular to an aqueous phase preparation method of size-adjustable spherical silver nanoparticles. Background technique [0002] Silver nanoparticles have excellent physical and chemical properties different from their macroscopic bulk, and have been widely studied and applied in many fields such as catalysis, biological and chemical sensors, optical imaging, nonlinear optics, surface-enhanced Raman scattering, and electronics. In the field of biomedicine, silver nanoparticles have become an antibacterial material with great development potential due to their excellent antibacterial properties. Since the above-mentioned properties of silver nanoparticles are closely related to the size / shape of the particles, it is the key to obtain silver nanoparticles with controllable size / shape easily, efficiently and stably. From practical application, spherical silver nanoparti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 郭志睿刘连科鲁翔季国忠
Owner THE SECOND AFFILIATED HOSPITAL OF NANJING MEDICAL UNIV
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