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Preparing method of skeleton structure crystallization nanogold

A skeleton structure, nano-gold technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as loss of catalytic oxidation ability, avoid agglomeration and re-dispersion process, and reduce roasting links. , the effect of less impurities

Active Publication Date: 2019-06-14
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used loading methods use heat treatment procedures to cause the dispersed gold nanoparticles to re-agglomerate, thereby losing their ability to catalyze oxidation

Method used

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  • Preparing method of skeleton structure crystallization nanogold

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of nano-gold inverse miniemulsion stabilizer:

[0028] At room temperature, 1 gram of sodium citrate and 3 grams of polyvinyl alcohol are dissolved in 100 grams of deionized water to form aqueous solution A, solution B is a single solution of cyclohexane, and solution C is an aqueous solution of chloroauric acid, and the mass ratio concentration is 1 gram of chloroauric acid / 1000 grams of deionized water. Weigh 104 grams of solution A, 500 grams of solution B and 50 grams of solution C and mix them, then quickly transfer to the pre-set ultrasonic biological pulverizer with a high power of 750W and pulverize at 90% power for 10 minutes at a temperature of 5°C; then oscillate with ultrasonic waves The power of the device is 250W, and the temperature is maintained at 5°C for standby.

[0029] (2) The preparation of the soluble salt of the precursor of the skeleton structure as the co-stabilizer of the miniemulsion:

[0030] At room temperature, add 1 gram...

Embodiment 2

[0034] (1) Preparation of nano-gold inverse miniemulsion stabilizer:

[0035] At room temperature, 2 grams of ascorbic acid and 5 grams of polyvinylpyrrolidone were dissolved in 100 grams of deionized water to form aqueous solution A; solution B was a mixed solution of cyclohexane and toluene with a mass ratio of 200:300; solution C was an aqueous solution of chloroauric acid , the mass specific concentration is 1 gram of chloroauric acid / 1000 gram of deionized water. Weigh 107 grams of solution A, 500 grams of solvent B and 50 grams of solution C and mix them, then quickly transfer to the pre-set ultrasonic biological pulverizer with a high power of 750W and pulverize at 90% power for 10 minutes at a temperature of 10°C; then oscillate with ultrasonic waves The power of the device is 250W, and the temperature is maintained at 10°C for standby.

[0036] (2) The preparation of the soluble salt of the precursor of the skeleton structure as the co-stabilizer of the miniemulsion:...

Embodiment 3

[0041] (1) Preparation of nano-gold inverse miniemulsion stabilizer:

[0042] At room temperature, 1.5 grams of sodium citrate and 3.5 grams of sodium polyacrylate are dissolved in 100 grams of deionized water to form aqueous solution A; solution B is a single solvent of cyclohexane; solution C is an aqueous solution of chloroauric acid, and the mass ratio concentration is 1 grams of chloroauric acid / 1000 grams of deionized water. Weigh 105 grams of solution A, 500 grams of solution B and 50 grams of solution C and mix them, then quickly transfer to the pre-set ultrasonic biological pulverizer with a high power of 750W and pulverize at 90% power for 10 minutes at a temperature of 8°C; then oscillate with ultrasonic waves The power of the device is 250W, and the temperature is maintained at 8°C for standby.

[0043] (2) The preparation of the soluble salt of the precursor of the skeleton structure as the co-stabilizer of the miniemulsion:

[0044]At room temperature, add 1.5 ...

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Abstract

The invention relates to the field of reverse phase colloid, industrial catalysis, fuel batteries, photovoltaic industry and the like, in particular to a preparing method of skeleton structure crystallization nanogold. A reverse phase Pickering miniemulsion dispersion method is used for stably synthesizing the skeleton structure crystallization nanogold, and through a hydrothermal method, the nanogold is formed; the formed Pickering reverse phase miniemulsion is few in impurity, and easy to process, and the loaded crystal nanogold with the high purity can be obtained; the skeleton structure material is the Pickering miniemulsion co-stablizer which can control and adjust the ratio of the load structure and the nanogold, formed nanogold solid particle size ranges from one to two nanometers,distribution is uniform, in the preparing process, the roasting link is omitted, and the agglomeration and redispersion of the nanogold are avoided.

Description

technical field [0001] The invention relates to the fields of reverse colloid, industrial catalysis, fuel cell, photovoltaic industry, etc., and particularly relates to the stable synthesis of crystallized nano-gold with a skeleton structure by a reverse-phase Pickering miniemulsion dispersion method. Background technique [0002] There is a polygonal structure on the surface of the crystalline gold nanoparticle, which has the function of catalytic oxidation. The surface of crystal particles can absorb harmful gases such as carbon monoxide, nitrogen monoxide or methane, and catalyze oxidation into carbon dioxide, nitrogen polyoxide and water. In particular, nanometer ferric oxide, cobalt tetroxide and nickel oxide are used as the framework to support gold, which greatly increases the adsorption area, significantly enhances the catalytic ability, and the catalytic conditions are milder. [0003] Generally, impregnation method and co-grinding method can be used for catalyst l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
Inventor 张震乾林永周刘芳丁建宁
Owner CHANGZHOU UNIV