Rhodium platinum alloy nanometer flower and preparation method thereof

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

Active Publication Date: 2016-11-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Rhodium platinum alloy nanometer flower and preparation method thereof
  • Rhodium platinum alloy nanometer flower and preparation method thereof
  • Rhodium platinum alloy nanometer flower and preparation method thereof

Examples

Experimental program
Comparison scheme
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, the diameter is 20-45nm, the width of stamens is 2-9nm, and the length is 5-20nm; Figure (b) is a scanning transmission electron microscope for preparing rhodium-platinum nanoflowers in this embodiment ( STEM) figure, figure (c, d) prepares the high-resolution transmission electron microscope (HRTEM)...

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 preparation method of a rhodium platinum alloy nanometer flower, and belongs to the field of nanometer materials. The method comprises the following steps: precursors of rhodium and platinum are dissolved to add in finishing agent solution, are stirred at 160-220 DEG C for reaction by 1-3 h, and are centrifugated to obtain the rhodium platinum alloy nanometer flower; and the prepared rhodium platinum alloy nanometer flower consists of multiple dense pistils, and is uniform in size distribution, excellent in dispersibility and controllabl in alloy component. The method is simpler in operation, high in repeatability, insensitive in reaction conditions and easier to realize, can prepare on a large scale, and is wider in application prospect on such aspects as catalysis, tail gas treatment, medicines and sensing.

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 Applications(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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