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Preparation method of mesoporous metal platinum nanospheres

A metal platinum and nanosphere technology, applied in metal processing equipment, nanotechnology, nanotechnology and other directions, can solve the problem of high synthesis cost, achieve uniform particle size, simple synthesis method and operation process, and good dispersibility.

Active Publication Date: 2019-07-30
YUNNAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high cost of synthesis of noble metal nanoparticles, how to improve the catalytic activity of noble metal nanoparticles has become the focus of research.

Method used

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  • Preparation method of mesoporous metal platinum nanospheres
  • Preparation method of mesoporous metal platinum nanospheres
  • Preparation method of mesoporous metal platinum nanospheres

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A preparation method of mesoporous metal platinum nanospheres, comprising the steps of:

[0037] S1. add 0.21g of cetyltrimethylammonium bromide (CTAB), 8ml of water (H 2 O), 2ml of K 2 PtCl 6 Solution (concentration: 0.01-0.1g / ml) ultrasonic dispersion;

[0038] S2. Place the reaction bottle in step S1 in a 95°C oil bath, and mechanically stir at 800r / min, so that the temperature in the reaction bottle reaches 95°C;

[0039] S3. After the temperature stabilizes (up to 95° C.), add 2 ml of ascorbic acid (AA) (concentration: 1 mol / L) dropwise to the reaction flask, and continue the reaction for 1-5 hours;

[0040] S4. After centrifuging the product obtained in step S3, wash with water and ethanol 3 times to remove excess reactants;

[0041] S5. the product obtained in step S4 is redispersed in 50ml acidic ethanol solution, heated at 80°C for 2h, then the solution is centrifuged, and the above steps are repeated 2-3 times to remove the surfactant (CTAB) in the nanopar...

Embodiment 2

[0044] The difference between this example and example 1 is that the amount of cetyltrimethylammonium bromide (CTAB) added to the reaction flask in step S1 is 0.1 g, and the others are the same as in example 1.

[0045] Depend on image 3 It can be seen that the prepared nanoparticles are still spherical in shape and have good dispersibility, the particle size of the nanoparticles is uniform, and the average diameter is still maintained at about 80nm.

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Abstract

The invention relates to the technical field of noble metal nanometer particles and discloses a preparation method of mesoporous metal platinum nanospheres. The preparation method comprises the stepsthat firstly, saline solution of platinum is evenly dispersed in an aqueous solution of a surface active agent, and the mixed solution is heated to 95 DEG C; then, a reducing agent is dropwise added to the reaction system, and platinum salt generates a reduction reaction under the action of the reducing agent and further interact with the surface active agent to form metal platinum nanometer particles; and finally, through extraction in an acidic ethyl alcohol solution, the surface active agent is removed, and then the target product, mesoporous metal platinum nanospheres, are obtained. By means of the synthetic strategy of a soft template, the mesoporous metal platinum nanospheres are designed and synthesized, and the synthesis method and operation process are simple; the prepared mesoporous metal platinum nanospheres are uniform in particle size and good in dispersibility, and compared with traditional metal platinum nanometer particles, the prepared mesoporous metal platinum nanospheres have high specific surface area and uniform bore diameter.

Description

technical field [0001] The invention relates to the technical field of noble metal nanoparticles, and more specifically, to a preparation method of mesoporous metal platinum nanospheres. Background technique [0002] As a catalyst, noble metals (gold, platinum, palladium) have been widely used in many important research fields such as organic synthesis reactions and industrial production due to their high catalytic activity. Noble metals with different nanostructures, such as nanorods, nanospheres, and nanowires, have also been synthesized one after another. Through research, it is found that the catalytic activity of noble metal nanoparticles mainly depends on the shape, particle size and composition of the particles. However, due to the high synthesis cost of noble metal nanoparticles, how to improve the catalytic activity of noble metal nanoparticles has become the focus of research. At first, people tried to synthesize noble metal nanoparticles with smaller particle si...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/07B22F1/054
Inventor 王雪何亚鹏荆碧刘丰祎刘治国
Owner YUNNAN NORMAL UNIV
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