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Nano rod and preparation method and application thereof

A nanorod and gold nanorod technology, applied in the field of nanorods and their preparation, can solve the problems of nanoparticle catalytic activity regulation, unreported substrate selectivity, harsh preparation conditions, etc., and achieves low reagent cost and high repeatability. , the effect of the simple method

Inactive Publication Date: 2014-07-02
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The preparation conditions of the above methods are relatively harsh or the operation is cumbersome, and the composition of the prepared CuPt alloy is relatively limited, and the catalytic properties of the nanoparticles have a great dependence on the composition, so it is difficult to realize the composition of the nanoparticles. to regulate the catalytic activity of
In addition, in the current reports on CuPt alloy as a catalyst, its selectivity to substrates has not been reported, and further research is needed.

Method used

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  • Nano rod and preparation method and application thereof
  • Nano rod and preparation method and application thereof
  • Nano rod and preparation method and application thereof

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preparation example Construction

[0022] The preparation method of the nanorod provided by the present invention comprises contacting a soluble platinum salt, a soluble copper salt, and a reducing agent with a gold nanorod in the presence of a solvent, and the amount of the soluble platinum salt is 0.1 per mole of gold atoms. -0.5 mol, the amount of the soluble copper salt is 0.01-3 mol, and the amount of the reducing agent is 2-20 mol.

[0023] Wherein, the solvent may be various solvents used in preparing nanorods, for example, water.

[0024] The inventors of the present invention found that if the amounts of soluble platinum salt, soluble copper salt, reducing agent and gold nanorods are not within the above-mentioned range defined in the present invention, it is difficult to obtain nanorods with high catalytic activity and CuPt alloy nano-island structure.

[0025] In the present invention, the conditions of the contact are not particularly limited. Preferably, the conditions of the contact include a temp...

Embodiment 1-9

[0055] This example is used to illustrate the preparation method of the nanorods of the present invention.

[0056] Take 1 mL of purified gold nanorod solution, add 5 μL of 10 mM CTAB aqueous solution and dilute to 2 mL with deionized water, add 10 mM copper chloride aqueous solution, 2 mM K 2 PtCl 4 Aqueous solution, after mixing evenly, add 0.1M AA solution, shake well and put it in a constant temperature water bath. After a period of time, a solution of nanorods with CuPt alloy nano-island structure is obtained, and then add 0.5mL CTAB solution with a concentration of 0.1M, Measure ultraviolet-visible-near-infrared absorption spectrum, the measurement result of embodiment 1,3,4,5,7 is respectively as figure 1 In Cu / Pt=0.03 line, Cu / Pt=0.23 line, Cu / Pt=0.29 line, Cu / Pt=0.55 line, Cu / Pt=1.34 line. Then centrifuge at 12000rpm for 5 minutes twice, redisperse the precipitate in 100 μL deionized water to obtain a sample, take 6 μL of the sample and drop it on a copper grid, and...

Embodiment 10

[0066] Take 1 mL of the purified gold nanorod solution, dilute it to 2 mL with deionized water, and add 23.5 μL of 2 mM K 2 PtCl 4 After the aqueous solution was mixed evenly, 8 μL of ascorbic acid solution with a concentration of 0.1 M was added, shaken well, and placed in a constant temperature water bath at 30° C. to react for 3 hours to obtain a seed solution of AuPt0.1. Then, 5 μL of 10 mM CTAB aqueous solution, 40 μL of 10 mM copper chloride aqueous solution, 75 μL of 2 mM K 2 PtCl 4 Aqueous solution, after mixing evenly, add 22.5 μL of ascorbic acid solution with a concentration of 0.1M, shake well and put it in a constant temperature water bath at 30°C for 30 minutes to react. After 30 minutes, a solution of nanorods with a CuPt alloy nano-island structure was obtained, to which 0.5ml of CTAB solution with a concentration of 0.1M was added, centrifuged at 12000rpm for 5 minutes twice, and the precipitate was redispersed in 100 μL of deionized water, and 6 μL of samp...

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Abstract

The invention provides a nano rod and a preparation method and application thereof. The preparation method includes: in the presence of solvent, allowing soluble platinum salt, soluble copper salt and reducing agent to be in contact with a gold nano rod, wherein for each mol of gold atom, 0.1-0.5mol of soluble platinum salt is used, 0.01-3mol of soluble copper salt is used, and 2-20mol of reducing agent is used. The nano rod prepared by the method has CuPt alloy nano island structures, selectivity on substrate catalyzing and high catalyzing efficiency are achieved, the catalytic activity, on an OPD, TMB+H2O2 system and H2O2, of the nano rod is evidently higher than that of the gold nano rod having only deposited platinum on the surface, and the nano rod prepared by the method is applicable to the fields of chemical and biological catalysis. In addition, the CuPt alloy nano island structures gather to two ends of the gold nano bar when the use amount of the soluble copper salt and the soluble platinum salt is increased, and accordingly nano rods of different morphologies and components can be obtained by the method.

Description

technical field [0001] The present invention relates to a nanorod and its preparation method and application, in particular, to a method for preparing a nanorod with a copper-platinum (CuPt) alloy nano-island structure and a nanorod with a CuPt alloy nano-island structure prepared by the method. Nanorods and their use in catalyzing oxidation and / or disproportionation reactions. Background technique [0002] Pt and Pt-based alloy nanoparticles are an important class of industrial catalysts, for example, as catalysts for low-temperature reduction of automobile exhaust and other important chemical reactions. At present, a large number of studies have shown that the catalytic performance of Pt can be improved by adjusting the size, morphology and structure of Pt nanoparticles. As the leading electrode material for fuel cells, pure Pt catalysts are extremely easy to adsorb small fuel molecule oxidation intermediates such as CO, causing catalyst poisoning and reduced catalytic ac...

Claims

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Application Information

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IPC IPC(8): B22F9/24B01J23/89C07D241/46
Inventor 胡晓娜吴晓春
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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