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Three-dimensional metal nanowire and preparation method thereof

A metal nanowire and three-dimensional technology, applied in the field of nanomaterials, can solve the problems of highly ordered pore distribution, low space utilization, and failure to obtain a large-scale nanoporous structure, so as to improve cycle stability , Alleviate structural collapse and increase specific capacity

Active Publication Date: 2017-11-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

The dealloying method belongs to the top-down preparation method. The three-dimensional porous electrode obtained by this method has a small pore size. At the same time, it has limitations on the types of metals, and it is difficult to achieve a highly ordered pore distribution.
Nickel nanofiber non-woven fabrics with smaller size can be obtained by electrospinning fibers (diameter 300-400nm) by electroless nickel plating, but the space utilization rate is low and the pore structure is also disorderly distributed.
Most of the currently known methods for fabricating porous metal conductive framework networks still fail to obtain nanoporous structures with large-scale structural order.

Method used

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  • Three-dimensional metal nanowire and preparation method thereof
  • Three-dimensional metal nanowire and preparation method thereof
  • Three-dimensional metal nanowire and preparation method thereof

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preparation example Construction

[0014] A method for preparing metal nanowires is provided in this specific embodiment, comprising the following steps:

[0015] S1, prepare a metal ion solution with a concentration of 0.01-1mol / L, add complexing agent and nucleating agent, and adjust the pH value to 10.0-13.5 with an alkali solution to prepare a solution A. Wherein, the metal ions are magnetic metal ions or a mixture of magnetic metal ions and non-magnetic metal ions.

[0016] In this step, the metal ion solution is preferably a metal salt solution. Wherein, the magnetic metal ions may be one or a mixture of divalent metal ions of nickel, cobalt and iron. The concentration of metal ions is 0.01-1 mol / L. On the one hand, if the concentration is too low, few metal nanowires can be obtained and the yield is low, which is not conducive to application. However, if the concentration is higher than 1mol / L, a large number of metal nanowires will be produced during the reduction process in the subsequent step S3. If...

Embodiment 1

[0039] (1) Preparation of metal ion solution (A solution):

[0040] Use water as a solvent to prepare 400mL of solution A at the following concentration, and use alkaline solution to adjust the pH of the solution to 12.0:

[0041] NiCl 2 0.1mol / L

[0042] Na 2 C 2 o 4 0.035mol / L

[0043] h 2 PdCl 4 0.2×10 -3 mol / L

[0044] (2) Configure strong reducing agent solution (B solution):

[0045] Prepare 400 mL of hydrazine hydrate solution with a concentration of 0.25 mol / L, and adjust the pH value to 12.5 with alkaline solution.

[0046] (3) Reduction in solution phase:

[0047]Preheat solution A and solution B in a water bath at 60°C for 30 minutes, and then mix them thoroughly. Place the titanium sheet magnetron sputtered with Pd in ​​a reaction vessel, and pour it into a polyacrylamide solution at 60°C. The A solution and the B solution were placed in a reaction container and mixed thoroughly, and reacted for 15 minutes at 60 ° C and 0.1 T under the first magnetic...

Embodiment 2

[0050] (1) Preparation of metal ion solution (A solution):

[0051] Use water as a solvent to prepare 400mL of solution A at the following concentration, and use alkaline solution to adjust the pH of the solution to 12.0:

[0052]

[0053] (2) Configure strong reducing agent solution (B solution):

[0054] Prepare 400 mL of hydrazine hydrate solution with a concentration of 0.2 mol / L, and adjust the pH value to 12.0 with alkaline solution.

[0055] (3) Reduction in solution phase:

[0056] Preheat solution A and solution B in a water bath at 50°C for 30 minutes, then mix thoroughly, place the nickel sheet of electrodeposited platinum metal in the reaction vessel, and pour it into the acrylamide-sodium acrylate copolymer solution at 50°C , put the A solution and the B solution in a reaction container and mix them well, and react for 20 minutes at 50°C and a first magnetic field direction parallel to the direction of gravity at 0.08T, and then set the direction of the magne...

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Abstract

The invention discloses a three-dimensional metal nanowire and a preparation method thereof. The preparation method comprises the following steps that S1, a metal ion solution with the concentration being 0.01-1 mol / L is prepared, a complexing agent and a nucleating agent are added, and a solution A is obtained by adjusting the pH value to be 10.0-13.5 through an alkaline solution, and magnetic metal ions or mixtures of magnetic metal ions and nonmagnetic metal ions are used as the metal ions; S2, a reducing agent solution with the concentration being 0.1-3 mol / L and with high reduction property is prepared, and a solution B is obtained by adjusting the pH value to be 10.0-13.5 through an alkaline solution; and S3, a reactor is provided, a base subjected to activation treatment is placed in the reactor, the solution A and the solution B are poured into the reactor, fully mixed, and reacted for T time under the 0.005-1 T magnetic field condition at 50-100 DEG C, and reaction stoste containing the three-dimensional metal nanowire formed by magnetic metal nanowires or alloy nanowires is obtained. Through the preparation method, the three-dimensional-structure metal nanowire arranged orderly can be prepared.

Description

【Technical field】 [0001] The invention relates to the technical field of nanomaterials, in particular to a three-dimensional metal nanowire and a preparation method thereof. 【Background technique】 [0002] In recent years, the academic community has made a series of attempts to develop high-performance conductive framework materials. Common nickel metal porous materials are mainly prepared by template method or dealloying method, such as commonly used nickel foam, which has an open and disordered pore structure, and the pore size is usually several hundred microns. The dealloying method belongs to the top-down preparation method. The three-dimensional porous electrode obtained by this method has a small pore size. At the same time, it has limitations on the types of metals, and it is difficult to achieve a highly ordered pore distribution. Electroless nickel plating on electrospun fibers (diameter 300-400nm) can obtain nickel nanofiber nonwovens with smaller size, but the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/24B22F2999/00B22F1/0547B22F2202/05
Inventor 杨诚吴铛刘佳惺邹培超
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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