Tri-metal nanoparticle and preparation method thereof
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A nanoparticle and trimetal technology, applied in the field of nanomaterials, can solve the problems such as no reports on the dendritic nanostructure of trimetal components, and achieve the effects of strong tunability, diversified physical and chemical properties, and simple process conditions.
Inactive Publication Date: 2014-03-19
SUZHOU UNIV
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[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.
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Embodiment 1
[0021] According to the Chinese invention patent with publication number CN103240420A "A Purification Method of Gold Biconical Nanoparticles", pure gold biconical nanoparticles are prepared.
[0022] Centrifuge three 1ml pure gold bipyramidal nanoparticle solutions at 8000rpm for 10min, concentrate and disperse them in 1ml 80mM cetyltriethylammonium bromide (CTAC) solution, add 60μL 0.01M silver nitrate solution, 15 μL of 0.1M ascorbic acid solution, shake well, place at 65° C. for 6 hours, concentrate after centrifugation, and obtain gold core-silver shell (AuBPsAg) nanoparticles.
[0023] Take two prepared gold core-silver shell (AuBPsAg) nanoparticles and disperse them in 1ml of ultrapure water, add 40μL of 0.01M chloropalladium acid solution and 20μL of ascorbic acid solution, shake well, let stand at room temperature for 1h, and centrifuge Afterwards, nanoparticles of dendritic silver-palladium alloys are grown at the two ends of the gold bicone.
[0024] The prepared na...
Embodiment 2
[0027] 1ml of high-purity gold bipyramid solution was centrifuged at 8000rpm for 10min, concentrated and dispersed in 1ml of 80mM cetyltriethylammonium bromide (CTAC) solution, and 80μL of 0.01M silver nitrate solution, 20μL 0.1M ascorbic acid solution, shake well, place at 65°C for 6h, concentrate after centrifugation, the obtained gold core-silver shell (AuBPsAg) nanoparticles are dispersed in 1ml ultrapure water, add 40μL 0.01M chloropalladium acid solution , 20 μL of ascorbic acid solution, shake well, and let it stand at room temperature for 3h.
[0028] The prepared nanoparticles are used as morphology molecules, see attached image 3 , a figure is the scanning electron microscope (SEM) figure that the two ends of the gold bipyramid obtained by the technical scheme of the present embodiment have dendritic silver-palladium alloy nanoparticles; Transmission electron microscope (TEM) image of silver-palladium alloy nanoparticles; it can be seen from the figure that other c...
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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 trimetallic 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 people pay attention to the preparation of multi-metal nanoparticles. Due to the synergistic effect, multi-metallic nanoparticles exhibit newer and more diversified physical and chemical properties than single metals, such as magnetism, superconductivity, shape memory effect, catalytic activity, hydrogen storage capacity and structural hardness, etc. Devices, electrochemical devices and catalysis have great application prospects. For example, multi-metallic nanoparticles have properties d...
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