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Nanogold solution preparing method based on sepharose gel

A kind of technology of agarose gel and nano-gold, which is applied in the direction of nanotechnology, can solve the problems of highly toxic organic solvents and unfavorable wide application, and achieve the effects of not easy to agglomerate, safe to use, and good compatibility

Inactive Publication Date: 2014-09-03
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to reducing agents, the currently reported preparation methods often need to introduce other additives, such as dispersants, stabilizers, protective agents or flocculants, etc., and may use organic solvents with high toxicity and serious pollution, which is not conducive to wide application.

Method used

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  • Nanogold solution preparing method based on sepharose gel
  • Nanogold solution preparing method based on sepharose gel
  • Nanogold solution preparing method based on sepharose gel

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A kind of preparation method of the nano gold solution based on agarose gel, comprises the following steps:

[0039] (1) Weigh 1.5 g of agarose gel and add it to 9 mL of ultrapure water, heat the mixed solution in a water bath, and stir until the mixed solution becomes clear and transparent to obtain a uniform agarose solution;

[0040] (2) Add 1mL of chloroauric acid solution with a concentration of 2.5mM to the prepared agarose solution, and stir at a constant temperature at 100°C for 5min. During this process, the rich hydroxyl groups in the agarose reduce the gold ions in the chloroauric acid to obtain gold particles. Place the mixed solution at 25°C for 15 days, and the obtained gold particles are embedded in the inner cavity of the gradually formed agarose gel to obtain nano-gold gel;

[0041] (3) Freeze-dry the nano-gold gel obtained in step (2) to remove the gel, and then wash with ultrapure water for 3 times to obtain the nano-gold solution.

[0042] Particle...

Embodiment 2

[0044] A kind of preparation method of the nano gold solution based on agarose gel, comprises the following steps:

[0045] (1) Weigh 1.5 g of agarose gel and add it to 5 mL of ultrapure water, heat the mixed solution in a water bath, and stir until the mixed solution becomes clear and transparent to obtain a uniform agarose solution;

[0046] (2) Add 5mL of chloroauric acid solution with a concentration of 0.02mM to the prepared agarose solution, and stir at a constant temperature of 90°C for 4 minutes. During this process, the rich hydroxyl groups in the agarose reduce the gold ions in the chloroauric acid to obtain gold particles. Place the mixed solution at 20°C for 15 days, and the obtained gold particles are embedded in the inner cavity of the gradually formed agarose gel to obtain nano-gold gel;

[0047] (3) Freeze-dry the nano-gold gel obtained in step (2) to remove the gel, and then wash with ultrapure water for 3 times to obtain the nano-gold solution.

[0048] The...

Embodiment 3

[0050] A kind of preparation method of the nano gold solution based on agarose gel, comprises the following steps:

[0051] (1) Weigh 0.8 g of agarose gel and add it to 8.5 mL of ultrapure water, heat the mixed solution in a water bath, and stir until the mixed solution becomes clear and transparent to obtain a uniform agarose solution;

[0052] (2) Add 1.5 mL of chloroauric acid solution with a concentration of 2.5mM to the prepared agarose solution, and stir at a constant temperature of 80°C for 5 minutes. During this process, the rich hydroxyl groups in the agarose will reduce the gold ions in the chloroauric acid get gold particles. Place the mixed solution at 30°C for 8 days, and the obtained gold particles are embedded in the inner cavity of the gradually formed agarose gel to obtain nano-gold gel;

[0053] (3) Freeze-dry the nano-gold gel obtained in step (2) to remove the gel, and then wash with ultrapure water for 3 times to obtain the nano-gold solution.

[0054]In...

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Abstract

The invention discloses a nanogold solution preparing method based on sepharose gel. The method comprises the following steps that firstly, the sepharose gel is added into water and heated to obtain a clarification sepharose solution; secondly, a chloroauric acid solution is added into the sepharose solution and stirred evenly at the constant temperature, and the mixed solution is placed at the normal temperature to obtain the nanogold sepharose gel; thirdly, the nanogold sepharose gel obtained in the second step is dried in a freezing mode, the gel is removed, and the nanogold solution is obtained after washing. The nanogold solution is formed by evenly scattering nanogold particles in water, the sizes of the nanogold particles are even, and the average particle diameter ranges from 1 nm to 10 nm. The preparing technology is simple and practical, the applied reducing agent is the sepharose gel which is common and non-toxic, the sizes of the obtained nanogold particles are even and controllable, the grain diameter is small, and the nanogold particles are not prone to being aggregated. The nanogold solution preparing method has very important actual application value in the nanogold preparing field.

Description

technical field [0001] The invention relates to a preparation method of agarose gel-based nano gold solution. Background technique [0002] Gold nanoparticles are widely used in electrochemical probes, optical probes, DNA detection, biochemical analysis, catalysts, sols, plant protection, and Raman scattering due to their special properties such as quantum size effects, macroscopic quantum tunneling effects, and surface effects. . [0003] Small-sized gold nanoparticles have higher specific surface area and higher charge density, higher catalytic activity, and have greater practical application prospects than large-sized gold nanoparticles. At present, the conditions for synthesizing small-sized gold nanoparticles are harsh, the steps are cumbersome, and many reagents are used. [CN 1663714A] such as Huang Dehuan took hydrazine hydrate as reducing agent, and prepared nano gold solution with polyvinylpyrrolidone and sodium lauryl sulfate as additives; Dong Shouan etc. [CN 15...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 吴江渝李竹许谦杜倩鄢国平李亮郭庆中
Owner WUHAN INSTITUTE OF TECHNOLOGY
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