Preparation method of platinum nanoparticle loaded platinum nanoparticle crystals

A platinum nanometer and particle technology, which is applied in the field of preparation of platinum nanoparticle-supported platinum nanocrystals, can solve the problems of difficulty in controlling the shape and size, and achieves good application prospects, no agglomeration phenomenon, and regular shape effects.

Inactive Publication Date: 2013-06-12
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many methods for preparing nanoparticles, such as reduction method, template method, sol-gel method, etc., but it is still difficult to control the shape and size.

Method used

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Examples

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Embodiment 1

[0026] The preparation method of the platinum nanoparticle-loaded platinum nanocrystal of the present invention, the preparation method comprises the following steps:

[0027] 1) Preparation of chloroplatinic acid stock solution: select a certain amount of chloroplatinic acid (H 2 PtCl 6 ) and dissolve it in pure water to make a chloroplatinic acid solution with a concentration of 250-300mM;

[0028] 2) Preparation of mixed induction solution: first weigh a certain amount of cetyltrimethylammonium bromide CTAB, and make it into a 40-50mM aqueous solution, which is marked as solution 1; then L-lysine, L-white Amino acid, L-serine, one or more of the three amino acids, prepared into a 0.4-0.8mol / L aqueous solution, marked as solution 2; finally, the solution 1 and solution 2 were mixed in a ratio of 1:9 Inducing solution, marked as solution 3;

[0029] 3) Hydrothermal induction method: Take 40-50ml of the above solution 3 and add it to the hydrothermal reaction kettle, and ad...

Embodiment 2

[0032] The preparation method of the platinum nanoparticle-loaded platinum nanocrystal of the present invention, the preparation method comprises the following steps:

[0033] 1) Preparation of chloroplatinic acid stock solution: select a certain amount of chloroplatinic acid (H 2 PtCl 6 ) and be dissolved in pure water to make a concentration of 50mM chloroplatinic acid solution;

[0034] 2) Preparation of mixed induction solution: First, weigh a certain amount of cetyltrimethylammonium bromide CTAB, prepare it into a 30mM aqueous solution, and mark it as solution 1; then add L-lysine, L-leucine One or several of these three amino acids, L-serine, were prepared into a 0.1mol / L aqueous solution, marked as solution 2; finally, solution 1 and solution 2 were prepared into a mixed induction solution with a ratio of 1:9, marked as is solution 3;

[0035] 3) Hydrothermal induction method: Take 30ml of the above solution 3 and add it to the hydrothermal reaction kettle, and add 0...

Embodiment 3

[0038] The preparation method of the platinum nanoparticle-loaded platinum nanocrystal of the present invention, the preparation method comprises the following steps:

[0039] 1) Preparation of chloroplatinic acid stock solution: select a certain amount of chloroplatinic acid (H 2 PtCl 6 ) and be dissolved in pure water to make a concentration of 400mM chloroplatinic acid solution;

[0040] 2) Preparation of mixed induction solution: First, weigh a certain amount of cetyltrimethylammonium bromide CTAB, prepare it into a 60mM aqueous solution, and mark it as solution 1; then add L-lysine, L-leucine One or several of these three amino acids, L-serine, are prepared into a 1mol / L aqueous solution, which is marked as solution 2; finally, solution 1 and solution 2 are prepared into a mixed induction solution with a ratio of 1:9, which is marked as Solution 3;

[0041] 3) Hydrothermal induction method: Take 60ml of the above solution 3 and add it to the hydrothermal reaction kettl...

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Abstract

The invention relates to a preparation method of platinum nanoparticle loaded platinum nanoparticle crystals. The preparation method comprises the following steps that 1, a certain quantity of chloroplatinic acid is selected and is dissolved in pure water to be prepared into chloroplatinic acid solution with the concentration being 50mM to 400mM; 2, a certain quantity of CTAB (cetyl trimethyl ammonium bromide) is weighed, is prepared into 30-60mM water solution and is marked as solution 1; one kind or several kinds in three kinds of amino acid including L-lysine, L-leucine and L-serine are prepared into 0.1 to 1 mol / L water solution and is marked as solution 2; and the solution 1 and the solution 2 are prepared into mixed induction liquid according to the proportion being 1:9, and the mixed induction liquid is marked as solution 3; 3, 30 to 60ml of solution 3 is added into a hydrothermal reaction kettle, meanwhile, 0.01 to 1 ml of 50mm to 400mM chloroplatinic acid solution is added; the solution is stirred for 0.5 to 4 hours and is then subjected to hydrothermal treatment for 3 to 8 hours at 150 to 200 DEG C, and the particle placement time is 12 to 24 hours after the hydrothermal treatment; and 4, a centrifugal tube contained with reaction products is centrifuged for 10 to 20 minutes at the rotating speed being 5000 to 6500 rpm, then, absolute ethyl alcohol is added for cleaning for 3 to 5 times, and final products are obtained.

Description

technical field [0001] The invention relates to a method for preparing platinum nanoparticle-loaded platinum nanocrystals through a hydrothermal induction method. Background technique [0002] The shape and size of nanoparticles have an important impact on their properties. Nanoparticles with regular shape, uniform size, and good crystallinity generally have good catalytic activity due to their small size effect and surface effect, and have broad application prospects in the field of catalysis. [0003] At present, there are many methods for preparing nanoparticles, such as reduction method, template method, sol-gel method, etc., but it is still difficult to control the shape and size. Contents of the invention [0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a method for preparing platinum nanoparticle-loaded platinum nanocrystals by a one-step hydrothermal induction method with simple preparation method and quic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F9/30B82Y30/00B82Y40/00
Inventor 王晟王騊汪林飞
Owner ZHEJIANG SCI-TECH UNIV
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