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Preparation method of au nanomaterial/au-metal oxide nanocomposite material

A nanocomposite material and nanomaterial technology, applied in the field of preparation of Au nanomaterial/Au-metal oxide nanocomposite material, can solve the problems of difficult size control, wide particle size distribution, harmfulness, etc., and achieve narrow particle size distribution, Low specific surface tension, anti-agglomeration effect

Inactive Publication Date: 2018-02-16
陈羽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, using water as a solvent is not suitable for the preparation of gold nanomaterials and gold-metal oxide composites in an environment below 0 degrees Celsius.
3. Although Au NPs with small particle size can be generated, the particle size distribution is relatively wide and the size is difficult to control
Some reports even pointed out that in the preparation of Au NPs by sodium citrate reduction method, ethanol itself is harmful to the formation of Au NPs.

Method used

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  • Preparation method of au nanomaterial/au-metal oxide nanocomposite material
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  • Preparation method of au nanomaterial/au-metal oxide nanocomposite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A preparation method of Au nanomaterials, comprising the steps of:

[0053] 1. Preparation of chloroauric acid ethanol solution:

[0054] a. Add 1g of chloroauric acid (HAuCl 4 4H 2 O) dissolved in 600mL absolute ethanol (mass percentage is 0.21%), set aside.

[0055] 2. Preparation of sodium citrate ethanol sol:

[0056] b. 40g sodium citrate dihydrate (Na 3 C 6 h 5 o 7 2H 2 O) Dissolve in 20 mL of 50° C. deionized water (66.7% by mass), stir well for 20 min, and set aside.

[0057] c. Prepare 50mL of absolute ethanol in a beaker, stir vigorously with a magnetic stirrer, and the stirring speed is greater than 1000rpm.

[0058] d. In the state of vigorous stirring, slowly drop the sodium citrate aqueous solution prepared in the first step into absolute ethanol with a 3mL dropper. 10 drops (about 0.2 mL) were dropped into every 50 mL of absolute ethanol solution to prepare sodium citrate ethanol sol solution. Repeat 4 times to obtain a total of 200 mL sodium c...

Embodiment 2

[0066] A gold-ZrO 2 A method for preparing a nanocomposite material, comprising the steps of:

[0067] 1. Preparation of chloroauric acid ethanol solution:

[0068] a. Add 1g of chloroauric acid (HAuCl 4 4H 2 O) dissolved in 600mL absolute ethanol (mass percentage is 0.21%), set aside.

[0069] 2. Preparation of sodium citrate ethanol sol:

[0070] b. 40g sodium citrate dihydrate (Na 3 C 6 h 5 o 7 2H 2 O) Dissolve in 20 mL of 50° C. deionized water (66.7% by mass), stir well for 20 min, and set aside.

[0071] c. Prepare 50mL of absolute ethanol in a beaker, stir vigorously with a magnetic stirrer, and the stirring speed is greater than 1000rpm.

[0072] d. In the state of vigorous stirring, slowly drop the sodium citrate aqueous solution prepared in the first step into absolute ethanol with a 3mL dropper. 10 drops (about 0.2 mL) were dropped into every 50 mL of absolute ethanol solution to prepare sodium citrate ethanol sol solution. Repeat 4 times to obtain a tot...

Embodiment 3

[0085] A gold-ZrO 2 A method for preparing a nanocomposite material, comprising the steps of:

[0086] 1. Preparation of chloroauric acid ethanol solution:

[0087] a. Add 1g of chloroauric acid (HAuCl 4 4H 2 O) dissolved in 600mL absolute ethanol (mass percentage is 0.21%), set aside.

[0088] 2. Preparation of sodium citrate ethanol sol:

[0089] b. 40g sodium citrate dihydrate (Na 3 C 6 h 5 o 7 2H 2 O) Dissolve in 20 mL of 50° C. deionized water (66.7% by mass), stir well for 20 min, and set aside.

[0090] c. Prepare 50mL of absolute ethanol in a beaker, stir vigorously with a magnetic stirrer, and the stirring speed is greater than 1000rpm.

[0091] d. In the state of vigorous stirring, slowly drop the sodium citrate aqueous solution prepared in the first step into absolute ethanol with a 3mL dropper. 10 drops (about 0.2 mL) were dropped into every 50 mL of absolute ethanol solution to prepare sodium citrate ethanol sol solution. Repeat 4 times to obtain a tot...

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Abstract

The invention provides a method for preparing an Au nanomaterial / Au-metal oxide nanocomposite material. The present invention utilizes the characteristic that sodium citrate is hardly soluble in pure ethanol, and utilizes sodium citrate ethanol sol to reduce chloroauric acid, thereby obtaining Au nanomaterials with narrower, more uniform particle size distribution, better dispersibility, and adjustable size. Au‑metal oxide nanocomposites. The method of the present invention effectively overcomes the shortcoming that sodium citrate is insoluble in ethanol, and does not need to add any stabilizer and protective agent, and has the advantages of simple process, mild reaction conditions, etc. Separation of sodium citrate ethanol sol particles, selecting sodium citrate ethanol sol particles with the required particle size to reduce chloroauric acid, so as to obtain Au nanomaterials with narrow, uniform particle size distribution and adjustable size at low temperature Metal oxide nanocomposites.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing an Au nanomaterial / Au-metal oxide nanocomposite material. Background technique [0002] In recent years, based on the small size effect of nanomaterials, the Raman of surface plasmon resonance, the fluorescence enhancement effect, and the polarization effect of light in light transmission, new biosensor devices have been developed, which can realize biomolecules ( The rapid detection of DNA, protein, antibody, etc.) has important applications in disease identification and early prediction, and has attracted widespread attention. Among them, the development of biosensor devices based on the surface-enhanced Raman scattering (SERS) effect is particularly prominent in recent years, and has become an important direction in the field of ultra-high sensitivity detection. [0003] Usually, the Raman spectrum signal of substances is very weak. However, stud...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/054
Inventor 陈羽欧阳方平李怡格李俊飞
Owner 陈羽
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