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Process for preparing nano gold particle materal

A nano-gold and particle technology, which is applied in the field of preparation of nano-gold particle materials, can solve problems such as environmental pollution of cyanide reagents, and achieve the effects of reducing production costs, improving size distribution and improving product quality.

Inactive Publication Date: 2005-09-21
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cyanide reagent used in the technical solution of this patent application seriously pollutes the environment, and the process itself has excessive chemical reductants or reductant reaction products that cause adsorption pollution to particles, and must undergo complicated washing treatment

Method used

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  • Process for preparing nano gold particle materal
  • Process for preparing nano gold particle materal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Get 2ml of HAuCl containing Au(III) 600mg / L 4 Solution (gold concentration 48mg / L), after diluting with water, add 0.846g of PEG600 (or 0.564g of PEG400, or 2.82g of PEG2000, or 8.46g of PEG6000;), 1ml of acetone (PEG400:Au=480:1, PEG600:Au=720 :1, PEG2000:Au=2400:1, PEG6000:Au=7200:1, acetone:Au=637:1), dilute to 25ml with water, and mix well. where HAuCl 4 The concentration is 2.44×10 -4 mol / L, PEG600 (or PEG400, or PEG2000, or PEG6000) concentration is 5.64×10 -2 mol / L, (CH 3 ) 2 The CO concentration is 0.53mol / L. The mixture solution is transferred to a quartz reactor, and irradiated with 300nm (48W) ultraviolet light for 15min under an Ultra-LUM (PATENT 5434478) ultraviolet lamp until the surface plasmon resonance spectrum λ of the solution system gold particles max Absorbance no longer changes. After characterization by TEM, the average diameter of the gold particles is about 5 nm (5 nm when using PEG400, 4 nm when using PEG2000, and 3 nm when...

Embodiment 2

[0026] Embodiment 2: Get 2ml of HAuCl containing Au(III) 600mg / L 4 After diluting the solution with water, add PEG6000.846g (or PEG400 0.564g; PEG2000 2.82g; PEG6000 8.46g), 1ml acetone, dilute to 25ml with water, and mix well. where HAuCl 4 The concentration is 2.44×10 -4 mol / L, PEG600 (or PEG400, or PEG2000, or PEG6000) concentration is 5.64×10 -2 mol / L, (CH 3 ) 2 The CO concentration is 0.53mol / L. The mixture solution is transferred to the quartz reactor and 2ml is taken out, and the gold "seed crystal" colloid solution prepared by the corresponding protective agent system in 2ml of Example 1 is added to the mixture simultaneously, and then the quartz reactor is placed in the Ultra-LUM (PATENT5434478) ultraviolet Irradiate at 300nm (48W) for 15min under the lamp, or irradiate for 50min under the plateau ultraviolet sunlight, until the surface plasmon resonance spectrum λ of the gold particles in the solution system max Absorbance no longer changes. After TEM characteri...

Embodiment 3

[0027] Embodiment 3: get 2ml to contain the HAuCl of Au(III) 600mg / L 4 Dilute the solution with water, adjust the volume to 25ml with water, heat to boiling on an electric stove, add 18 mg of trisodium citrate while stirring, continue stirring and keep boiling for 5 minutes, cool to obtain a gold colloid solution and use it as a "seed crystal" . In addition, take 2ml of HAuCl containing Au(III) 600mg / L 4 After diluting the solution with water, add 0.846g of PEG600, 1ml of acetone, dilute to 25ml with water, and mix well. where HAuCl 4 Concentration 2.44×10 -4 mol / L, PEG600 concentration 5.64×10 -2 mol / L, (CH 3 ) 2 The CO concentration is 0.53mol / L. Transfer the mixture solution to a quartz reactor and take out 2ml, then add 2ml of the "seed crystal" solution prepared by the above-mentioned chemical method, and then irradiate the quartz reactor at 300nm (48W) for 15min under the Ultra-LUM (PATENT 5434478) ultraviolet lamp , or irradiate for 50 minutes under the plateau ...

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Abstract

The preparation process of nano gold particle material includes the following steps: preparing mixed water solution of HAuCl4, protecting agent and acetone in the weight ratio of 1 to 10-10000 to 100-1500, with the protecting agent being one of polyglycol, PVA and PVP; and irradiating the mixed water solution with ultraviolet ray of wavelength 254-400 nm to complete the reduction reaction to obtain nano gold particle. The said technological process is simple, and can produce pure nano gold particle with controllable size and narrow size distribution range. The produced nano gold particle may be used in biomedicine, electronic industry and fine chemical industry.

Description

technical field [0001] The invention relates to a preparation method of nano gold particle material. Background technique [0002] The research and application of noble metal nanomaterials has become a very dynamic and attractive new field. Gold nanoparticles are used as a very important precursor material in many applications, and the degree of development and application often depends on the size, shape and dispersion of gold particles. [0003] The preparation methods of monodisperse gold nanoparticles include physical or chemical methods. The more commonly used physical methods include inert gas metal atom evaporation method, metal organic compound vapor synthesis method, and excitation and sputtering methods using various excitation sources. Liquid-phase chemistry has attracted much attention in recent years due to its flexibility in designing and synthesizing new materials. Common methods for liquid-phase chemical synthesis of gold nanoparticles include chemical rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 董守安唐春
Owner KUNMING INST OF PRECIOUS METALS
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