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A kind of pure silver nanorod with hexagonal cross section and preparation method thereof

A technology of hexagonal and nanorods, which is applied in the field of pure silver nanorods with hexagonal cross-sections and its preparation, can solve the problem of poor anisotropic differentiation of silver nanoparticles, instability of silver nanoparticles, and poor size controllability and other problems, to achieve the effect of uniform size, mild growth environment, stable and uniform output

Active Publication Date: 2022-08-05
XIAN TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Silver nanorods prepared by high-temperature alcohol reduction method are stable in shape but poor in size controllability, always accompanied by silver nanoparticles and silver nanowires of different sizes;
[0005] The method of using seeds to prepare silver nanorods has high controllability, high yield and uniform size, but due to the instability of silver nanoparticles, silver nanoparticles cannot be anisotropically differentiated in the culture medium, so other methods are usually used. Metal nanobiconical particles are used as the growth seeds of silver nanorods, such as the pd seed proposed by Younan Xia et al. and the Au seed proposed by JianfangWang et al., which greatly improves the yield and quality of silver nanorods, but this also introduces impurity metals, which to a certain extent brought interference signals to the research in nano-optics

Method used

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  • A kind of pure silver nanorod with hexagonal cross section and preparation method thereof
  • A kind of pure silver nanorod with hexagonal cross section and preparation method thereof
  • A kind of pure silver nanorod with hexagonal cross section and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A preparation method of pure silver nanorods with hexagonal cross-section:

[0026] 1. First prepare silver nanoparticles with sodium alginate as carrier:

[0027] At room temperature, 50ml of silver nitrate aqueous solution with a concentration of 0.01mol / L was added to 500g of sodium alginate aqueous solution with a mass fraction of 0.01%, and after stirring for 30 minutes in the dark, 25ml of sodium borohydride with a concentration of 0.1mol / L was injected. The aqueous solution, reacted for one hour, was naturally dialyzed in deionized water for 3 to 5 days using a dialysis bag to obtain silver nanoparticles with sodium alginate as a carrier. The concentration of the silver nanoparticle dispersion solution was 8.696×10 -4 mol / L.

[0028] 2. Preparation of pure silver nanorods:

[0029] Under the condition of 26 ℃ ~ 27 ℃, 15 ml of sodium dodecyl sulfate aqueous solution with a concentration of 0.005 mol / L was stirred for 30 minutes, and then 0.4 ml of silver nitrate...

Embodiment 2

[0032] 1. First prepare silver nanoparticles with sodium alginate as carrier:

[0033] The same method steps as in Example 1 were used to prepare silver nanoparticles with sodium alginate as a carrier.

[0034] 2. Preparation of pure silver nanorods:

[0035] Under the condition of 26 ℃ ~ 27 ℃, 20 ml of sodium dodecyl sulfate aqueous solution with a concentration of 0.005 mol / L was stirred for 30 minutes, and then 0.5 ml of silver nitrate aqueous solution with a concentration of 0.01 mol / L was rapidly added in sequence, and 0.07 ml of a concentration of 0.1mol / L of ascorbic acid aqueous solution and 0.04ml of silver nanoparticle dispersed aqueous solution with a concentration of 8.696×10-4mol / L were maintained in a stirring state for 3h, then centrifuged at 5500 rpm for 15~20min, and the supernatant was removed. Add an equal volume of aqueous solution to maintain the same rotation speed and time for the second centrifugation, remove the supernatant again, and the lower layer ...

Embodiment 3

[0038] 1. First prepare silver nanoparticles with sodium alginate as carrier:

[0039] The same method steps as in Example 1 were used to prepare silver nanoparticles with sodium alginate as a carrier.

[0040] 2. Preparation of pure silver nanorods:

[0041] Under the condition of 26 ℃ ~ 27 ℃, 30 ml of sodium dodecyl sulfate aqueous solution with a concentration of 0.005 mol / L was stirred for 30 minutes, and then 0.8 ml of silver nitrate aqueous solution with a concentration of 0.01 mol / L was rapidly added in sequence, and 0.1 ml of a concentration of After 0.1 mol / L of ascorbic acid aqueous solution was reacted for 3 to 5 minutes, 0.04 ml of silver nanoparticle dispersion aqueous solution with a concentration of 8.696×10-4 mol / L was added, and after the reaction was maintained for 3 hours, the solution was centrifuged at 5500 rpm for 15 minutes. ~20min, remove the supernatant liquid, add an equal volume of aqueous solution to maintain the same rotation speed and time for a ...

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Abstract

The present invention is a nano -structure preparation technology field, and it involves a sterling silver nanoscope and its preparation methods that specialize in a hexagonal section.The preparation method adopted by the present invention is: under the conditions of 26 ° C ~ 27 ° C, after stirring 15 to 30 ml of sodium sulfate sulfate aquatic solution for 10 to 30 minutes, quickly add 0.4 to 0.8ml of silver water solution, 0.05 ~ ~ 0.05 lytic0.1ml of anti -hemorrite water solution and 0.004 ~ 0.04ml silver nano particles dispersed the aqueous solution. After the stirring state reacts for 3h, the lower sedimentation of the centrifugal sediment has a sterling silver nano -nano -nanotransm stick, and it is scattered and stored in the aqueous solution.The present invention provides a sterling silver nano stick and its preparation method of hexagonal cross -section.It is 50 ~ 500nm, and the horizontal diameter is 20 ~ 10nm.

Description

technical field [0001] The invention belongs to the technical field of nanostructure preparation, in particular to a pure silver nanorod with a hexagonal section and a preparation method thereof. Background technique [0002] The morphology and size of noble metal nanostructures directly affect their physical and chemical properties, so the preparation methods of noble metal nanostructures with different morphologies have become a major focus in related research fields. [0003] Silver nanorods are anisotropically grown noble metal structures with high quality factors, so they are favored by nano-optics researchers. The preparation of silver nanorods usually chooses the high temperature alcohol reduction method or grows with the help of metal nanoparticles as seeds. [0004] The silver nanorods prepared by the high temperature alcohol reduction method have stable shape but poor size controllability, and are always accompanied by silver nanoparticles and silver nanowires of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/054B82Y40/00B82Y30/00
CPCB22F9/24B82Y40/00B82Y30/00B22F1/0553B22F1/054
Inventor 杨鹏飞梁雨刘卫国张大霄
Owner XIAN TECH UNIV
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