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A kind of rhodium-platinum alloy nano flower and preparation method thereof

A platinum alloy and nanoflower technology, applied in the field of nanomaterials, can solve problems such as complex preparation methods, low reaction repetition rate, and poor dispersion, and achieve easy large-scale production, good size uniformity, and good chemical stability Effect

Active Publication Date: 2018-06-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) It is difficult to control the shape and size uniformity of noble metal nanoparticles. Precise control of particle size and shape is the key to the preparation of high-performance nanoparticles and the prerequisite for material performance research and device development. The performance of these devices is largely Depends on the size, morphology and assembly of nanostructural units;
[0005] (2) The dispersibility is not good, and it is easy to agglomerate, resulting in a decrease in performance and low material utilization;
[0006] (3) Lack of long-term chemical stability, especially in acid-base environment, it will be corroded;
[0007] (4) The preparation method is complicated and the reaction repetition rate is low;
[0008] (5) Performance limitations of single-component nanoparticles, etc.
These problems have greatly limited the practical application of noble metal nanoparticles.

Method used

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  • A kind of rhodium-platinum alloy nano flower and preparation method thereof
  • A kind of rhodium-platinum alloy nano flower and preparation method thereof
  • A kind of rhodium-platinum alloy nano flower and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Firstly, 9.9mg rhodium trifluoroacetate and 11.8mg platinum acetylacetonate were stirred and dissolved in 3mL oleylamine at room temperature; then 300mg CTAB and 5mL oleylamine were mixed in a 20mL seed bottle; then the seed bottle was heated at 200°C After stirring for 10 minutes in a heating platform, 3 mL of oleylamine containing the precursor was injected, and the reaction was carried out at 200 °C for 2 h. After the reaction is over, the reaction solution is centrifuged to obtain rhodium-platinum alloy nanoflowers.

[0040] The TEM morphology of rhodium-platinum alloy nanoflowers is as follows: figure 1 As shown in (a), the size distribution of nanoflowers is uniform, with a diameter of 20-45nm, a stamen width of 2-9nm, and a length of 5-20nm; figure 1 (b) prepares the scanning transmission electron microscope (STEM) figure of the rhodium-platinum nanoflower for the present embodiment, and figure (c, d) prepares the high-resolution transmission electron microscope...

Embodiment 2

[0042] Firstly, 3.3mg rhodium trifluoroacetate and 19.7mg platinum acetylacetonate were stirred and dissolved in 3mL oleylamine at room temperature; then 300mg CTAB and 5mL oleylamine were mixed in a 20mL seed bottle; then the seed bottle was heated at 200°C After stirring for 10 minutes in a heating platform, 3 mL of oleylamine containing the precursor was injected, and the reaction was carried out at 200 °C for 2 h. After the reaction is over, the reaction solution is centrifuged to obtain rhodium-platinum alloy nanoflowers, such as image 3 (a).

Embodiment 3

[0044] Firstly, 6.6mg rhodium trifluoroacetate and 15.7mg platinum acetylacetonate were stirred and dissolved in 3mL oleylamine at room temperature; then 300mg CTAB and 5mL oleylamine were mixed in a 20mL seed bottle; then the seed bottle was heated at 200°C After stirring for 10 minutes in a heating platform, 3 mL of oleylamine containing the precursor was injected, and the reaction was carried out at 200 °C for 2 h. After the reaction is over, the reaction solution is centrifuged to obtain rhodium-platinum alloy nanoflowers, such as image 3 (b).

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Abstract

The invention discloses a method for preparing rhodium-platinum alloy nanoflowers, which belongs to the field of nanomaterials. In the method of the present invention, after the precursors of rhodium and platinum are dissolved, they are added to the modifier solution, stirred and reacted at 160-220° C. for 1-3 hours, and centrifuged to obtain rhodium-platinum alloy nanoflowers; the prepared rhodium-platinum alloy nanoflowers The structure is composed of many dense stamens, with uniform size distribution, good dispersion and controllable alloy composition. The method of the invention is extremely simple in operation, high in repeatability, insensitive to reaction conditions, easy to realize, capable of large-scale production, and has great application prospects in catalysis, tail gas treatment, medicine, sensing and the like.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and in particular relates to a rhodium-platinum alloy nanoflower and a preparation method thereof. Background technique [0002] Since changes in the size, morphology, composition and structural order of nanomaterials will bring unique optical, electrical and chemical properties, a large number of researches on nanomaterials with special functions have been carried out in recent years. Among them, the research on noble metal nanomaterials is particularly outstanding. The design and construction of noble metal composite nanoparticles with special properties has become a hot spot in the field of material science research in recent years. [0003] However, in practical applications, the preparation of noble metal nanoparticles usually has the following problems: [0004] (1) It is difficult to control the shape and size uniformity of noble metal nanoparticles. Precise control of particle size and shape...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0553B22F1/07
Inventor 张辉熊亚林颜聿聪杨德仁
Owner ZHEJIANG UNIV
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