A kind of three metal nanoparticles and preparation method thereof

A nanoparticle and three-metal technology, applied in the field of nanomaterials, can solve the problems such as the dendritic nanostructure of three-metal components, and achieve the effects of strong adjustability, diversified physical and chemical properties, and simple process conditions

Inactive Publication Date: 2015-11-18
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, dendritic structure alloy nanoparticles are rarely reported in the literature, and the existing reports mainly focus on the research of bimetallic components, and there is no report on dendritic nanostructures of trimetallic components.

Method used

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  • A kind of three metal nanoparticles and preparation method thereof
  • A kind of three metal nanoparticles and preparation method thereof
  • A kind of three metal nanoparticles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to the Chinese invention patent with publication number CN103240420A "A method for purifying gold bipyramid nanoparticles", pure gold bipyramid nanoparticles were prepared.

[0022] Three 1ml pure gold biconical nanoparticle solutions were centrifuged at 8000rpm for 10min, concentrated and dispersed in 1ml 80mM cetyltriethylammonium bromide (CTAC) solution, and 60μL 0.01M silver nitrate solution was added. , 15 μL of 0.1M ascorbic acid solution, shake well, place at 65°C for 6 h, centrifuge and concentrate to obtain gold core-silver shell (AuBPsAg) nanoparticles.

[0023] Disperse two prepared gold core-silver shell (AuBPsAg) nanoparticles in 1 ml of ultrapure water, add 40 μL of 0.01M chloropalladic acid solution and 20 μL of ascorbic acid solution, shake well, stand at room temperature for 1 h, and centrifuge Afterwards, nano-particles with dendritic silver-palladium alloys growing at both ends of the gold bipyramid are obtained.

[0024] Morphology analysi...

Embodiment 2

[0027] 1ml of high-purity gold biconical solution was centrifuged at 8000rpm for 10min, concentrated and dispersed in 1ml of 80mM cetyltriethylammonium bromide (CTAC) solution, 80μL of 0.01M silver nitrate solution, 20μL of 0.01M silver nitrate solution were added. 1M ascorbic acid solution, shaken well, placed at 65°C for 6h, centrifuged and concentrated, the obtained gold core-silver shell (AuBPsAg) nanoparticles were dispersed in 1ml ultrapure water, 40μL 0.01M chloropalladium acid solution was added, 20 μL of ascorbic acid solution, shake well, and let stand for 3h at room temperature.

[0028] The prepared nanoparticles are used as morphology molecules, see appendix image 3 , Figure a is a scanning electron microscope (SEM) image of the gold bipyramid with dendritic silver-palladium alloy nanoparticles at both ends prepared by the technical solution of this embodiment; b, c and d are images of the gold bipyramid with dendrites at both ends. Transmission electron microsc...

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Abstract

The invention discloses a tri-metal nanoparticle and a preparation method thereof. The tri-metal nanoparticle is dumbbell-shaped in morphology, a gold bipyramid is arranged at the waist, and heads at two ends of the waist are in sliver-palladium alloy branch shapes. The gold bipyramid is taken as a seed, a silver nitrate solution is taken as a metal precursor, a clubbed template nanoparticle adopting a core-shell structure and with the gold bipyramid covered with sliver is prepared with a seed growing method, and the template nanoparticle is scattered in ultrapure water after centrifugation; by using modified electric displacement in combination with a co-reduction reaction, a palladium chloride acid solution is added into an aqueous solution of the obtained template nanoparticle, ascorbic acid is taken as a reducing agent, and standing is performed at a room temperature; and the dumbbell-shaped tri-metal nanoparticle is obtained through adjusting the molar ratio of silver nitrate to palladium chloride acid and standing time. According to the tri-metal nanoparticle and the preparation method thereof, the nanoparticle in the sliver-palladium alloy branch shape is selectively grown on the gold bipyramid, and a tri-metal nanostructured material is diversified in physicochemical property and high in adjustability.

Description

technical field [0001] The invention relates to a metal nanoparticle and a preparation method thereof, in particular to a dumbbell-shaped trimetal nanoparticle and a preparation method thereof, belonging to the field of nanomaterials. Background technique [0002] In recent years, nanoparticle-based technologies have been widely used because of their unique optical, electric, and magnetic properties that depend on nanostructures. In addition to single-metal nanoparticles, more and more attention has been paid to the preparation of multi-metal nanoparticles. Due to the synergistic effect, multimetallic nanoparticles exhibit more updated and diversified physicochemical properties than single metals, such as magnetism, superconductivity, shape memory effect, catalytic activity, hydrogen storage capacity and structural hardness, etc. It has great application prospects in the fields of devices, electrochemical devices and catalysis. For example, multi-metallic nanoparticles hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/24B82Y40/00
Inventor 程丝周琳章瀚范丽娟
Owner SUZHOU UNIV
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