Method for preparing rod-shaped platinum nanoparticles

A platinum nanoparticle and rod-shaped technology, which is applied in the field of preparation of precious metal nanomaterials, can solve problems such as complex operation, difficult acquisition of target products, and difficult growth, and achieve uniform distribution

Active Publication Date: 2020-01-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To date, the synthesis of ultrathin noble metal nanowires has remained unattainable without templates, and it is believed that Pt is directly incorporated into 1D single-crystal nanowires / nanorods, and template-free growth in solution is particularly difficult.
Therefore, the preparation method of rod-shaped platinum nanoparticles in the prior art often adopts the template method, and its operation is complicated, and the target product is not easy to obtain

Method used

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  • Method for preparing rod-shaped platinum nanoparticles
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  • Method for preparing rod-shaped platinum nanoparticles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: a kind of preparation method of rod-shaped platinum nanoparticles, the specific steps are as follows:

[0028] (1) Evaporate and crystallize the platinum precursor solution (chloroplatinic acid solution) to obtain platinum precursor crystals; the concentration of the platinum precursor solution (chloroplatinic acid solution) is 0.01mol / L;

[0029] (2) Add the platinum precursor crystal to the surfactant-surfactant and ultrasonically treat it to obtain a platinum precursor-surfactant mixed solution, in which the surfactant is a mixed solution of oleic acid-oleylamine, and a mixed solution of oleic acid-oleylamine The volume ratio of oleic acid to oleylamine in the solution is 3:1, the concentration of platinum precursor in the platinum precursor-surfactant mixed solution is 0.005mol / L; the surface dispersant is polyvinylpyrrolidone, polyvinylpyrrolidone and platinum precursor The molar ratio is 1:20;

[0030] (3) Prepare the reducing agent oleic acid solut...

Embodiment 2

[0034] Embodiment 2: a kind of preparation method of rod-shaped platinum nanoparticles, the specific steps are as follows:

[0035] (1) Evaporate and crystallize the platinum precursor solution (potassium chloroplatinate solution) to obtain platinum precursor crystals; the concentration of the platinum precursor solution (potassium chloroplatinate solution) is 0.1mol / L;

[0036](2) Add the platinum precursor crystal to the surfactant-surfactant and ultrasonically treat it to obtain a platinum precursor-surfactant mixed solution, in which the surfactant is a mixed solution of oleic acid-oleylamine, and a mixed solution of oleic acid-oleylamine The volume ratio of oleic acid to oleylamine in the solution is 4:1, the concentration of platinum precursor in the platinum precursor-surfactant mixed solution is 0.02mol / L; the surface dispersant is polyvinylpyrrolidone, polyvinylpyrrolidone and platinum precursor The molar ratio is 1:10;

[0037] (3) Prepare the reducing agent oleic a...

Embodiment 3

[0040] Embodiment 3: a kind of preparation method of rod-shaped platinum nanoparticles, the specific steps are as follows:

[0041] (1) Evaporate and crystallize the platinum precursor solution (ammonium chloroplatinite solution) to obtain platinum precursor crystals; the concentration of the platinum precursor solution (ammonium chloroplatinite solution) is 0.05mol / L;

[0042] (2) Add the platinum precursor crystal to the surfactant-surfactant and ultrasonically treat it to obtain a platinum precursor-surfactant mixed solution, in which the surfactant is a mixed solution of oleic acid-oleylamine, and a mixed solution of oleic acid-oleylamine The volume ratio of oleic acid and oleylamine in the solution is 5:1, the concentration of platinum precursor in the platinum precursor-surfactant mixed solution is 0.01mol / L; the surface dispersant is polyvinylpyrrolidone, polyvinylpyrrolidone and platinum precursor The molar ratio is 1:15;

[0043] (3) Prepare the reducing agent oleic ...

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Abstract

The invention relates to a method for preparing rod-shaped platinum nanoparticles, and belongs to the technical field of preparation of noble metal nanomaterials. The method comprises the following steps: evaporating and crystallizing a platinum precursor solution to obtain a platinum precursor crystal; adding the platinum precursor crystal to a surfactant and ultrasonic processing to obtain a platinum precursor-surfactant mixed solution, wherein the surfactant is an oleic acid-oleylamine mixed solution; at the temperature of 70 to 90 EDG C, under stirring, dropwise adding the reducing agent oleic acid solution to the platinum precursor-surfactant mixed solution to react until the system became black to form platinum black, adding volatile organic solvents to destroy oil phase organics aggregated on the surfaces of the platinum particles, and continuing to react until the pH of the system is 6.5-7.5 to obtain a reaction product mixed liquid; and performing solid-liquid separation on the reaction product mixed liquid, washing the solid with anhydrous ethanol and deionized water sequentially, and drying under vacuum to obtain the rod-shaped platinum nanoparticles. The small-sized rod-shaped platinum nanoparticles with a length of several hundred micrometers are prepared in a liquid phase reaction system, and the yield reaches more than 90%.

Description

technical field [0001] The invention relates to a method for preparing rod-shaped platinum nanoparticles, which belongs to the technical field of preparation of noble metal nanometer materials. Background technique [0002] Noble metal nanoparticles with different shapes have special physical and chemical properties, and have great application prospects in materials science, optics, biosensing, biomedical diagnosis, anticancer drug development and disease treatment. [0003] The preparation methods of platinum nanorods mainly include template method, photochemical method, seed crystal growth method and electrochemical method. Its growth direction forms platinum nanorods. There are many factors that affect the morphology and aspect ratio of platinum nanorods, such as ambient temperature and pH value. Since platinum nanorods can be assembled into 1D, 2D and 3D structures under suitable conditions, their resonance absorption peaks are sensitive to the shape, size, spacing and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00
CPCB22F9/24B22F1/07B22F1/054
Inventor 胡劲孙浩然段云彪王开军张维钧
Owner KUNMING UNIV OF SCI & TECH
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