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Preparation method of icosahedron crystalline nano nickel-cobalt alloy

A technology of icosahedron and nano-nickel, applied in the field of materials, to achieve the effect of convenient and simple product processing, high purity and strong versatility

Inactive Publication Date: 2012-10-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the synthesis of polyhedral materials such as NiCo icosahedra based on a simple method

Method used

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  • Preparation method of icosahedron crystalline nano nickel-cobalt alloy
  • Preparation method of icosahedron crystalline nano nickel-cobalt alloy
  • Preparation method of icosahedron crystalline nano nickel-cobalt alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of Ni 48 Co 52 The method of icosahedral nanoparticles includes the following steps:

[0027] In the first step, the reaction kettle is treated with dilute acid, filled with distilled water, and heated to 100°C. Then wash with distilled water and dry for later use;

[0028] In the second step, add a straw of absolute ethanol to the clean reactor.

[0029] The third step is to accurately weigh 0.7465g of NiC respectively 2 O 4 ·2H 2 O, 0.7472g of CoC 2 O 4 Place 1.2g of NaOH in a beaker, add 10ml of deionized water, stir well to dissolve it, and then transfer to a 25ml volumetric flask to prepare 0.12mol / L NiC 2 O 4 , 0.12mol / L CoC 2 O 4 , 1.2mol / L NaOH aqueous solution.

[0030] The fourth step is to add about 1ml ethanol and 0.5ml NiC to the above solution 2 O 4 , 0.5ml CoC 2 O 4 , 1ml prepared NaOH, then add 7ml of 1, 2-propanediol, ultrasonic for 10min. Install the kettle jacket, and then heat it in a muffle furnace at 210°C for 6 hours.

[0031] In the fifth ste...

Embodiment 2

[0033] A preparation method of icosahedral crystalline nano nickel-cobalt alloy, the method specifically includes the following steps:

[0034] (1) Cleaning the reactor

[0035] After the reaction kettle is treated with 0.1-0.2mol / L hydrochloric acid, it is filled with distilled water and heated to 100°C. Then wash with distilled water and dry for later use;

[0036] (2) Preparation of NaOH aqueous solution

[0037] Weigh a certain amount of NaOH and place it in a beaker, add deionized water, fully stir to dissolve, transfer to a volumetric flask, dilute to the required volume, and make a 1.2mol / L NaOH aqueous solution;

[0038] (3) Preparation of Ni and Co aqueous solutions

[0039] Weigh appropriate amount of NiC 2 O 4 ·2H 2 O, CoC 2 O 4 , Put an appropriate amount of deionized water in a beaker, after it is dissolved, transfer to a volumetric flask, dilute to the required volume. Stir evenly to make 0.12mol / L NiC 2 O 4 , 0.12mol / LCoC 2 O 4 Aqueous solution, ready for use;

[0040] (4...

Embodiment 3

[0044] A preparation method of icosahedral crystalline nano nickel-cobalt alloy, the method specifically includes the following steps:

[0045] (1) Cleaning the reactor

[0046] After the reaction kettle is treated with 0.1-0.2mol / L sulfuric acid, it is filled with distilled water and heated to 100°C. Then wash with distilled water and dry for later use;

[0047] (2) Preparation of NaOH aqueous solution

[0048] Weigh a certain amount of NaOH and place it in a beaker, add deionized water, fully stir to dissolve, transfer to a volumetric flask, dilute to the required volume, and make a 1.2mol / L NaOH aqueous solution;

[0049] (3) Preparation of Ni and Co aqueous solutions

[0050] Weigh appropriate amount of NiC 2 O 4 ·2H 2 O, CoC 2 O 4 , Put an appropriate amount of deionized water in a beaker, after it is dissolved, transfer to a volumetric flask, dilute to the required volume. Stir evenly to make 0.12mol / L NiC 2 O 4 , 0.12mol / LCoC 2 O 4 Aqueous solution, ready for use;

[0051] (4) Ad...

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Abstract

The invention relates to a preparation method of an icosahedron crystalline nano nickel-cobalt alloy. According to the method, under an alkaline condition, nickel salt and cobalt salt are reduced by 1,2-propylene glycol at high temperature, so as to obtain the icosahedron crystalline nano nickel-cobalt alloy. Compared with the prior art, the method provided by the invention has the advantages that the regulation and control performance for alloy constituent contents of a product is good; simple inorganic salts are respectively used as reactants, so that the commonality is good; and raw materials can be obtained easily, a catalyst, a surfactant or a template is not needed, and the cost is low. The product prepared by the method has favorable catalytic performance, can be used as a high-performance electrochemical catalyst and is wider in development prospect and application space; and the method provided by the invention is simple in process, mild in preparation conditions, stable in product appearance, high in product purity, convenient and concise in product treatment and suitable for medium-scale industrial production.

Description

Technical field [0001] The invention belongs to the technical field of materials, and particularly relates to a preparation method of an icosahedral crystalline nano nickel-cobalt alloy. Background technique [0002] Nano science and technology is a new technology that was developed rapidly in the late 1980s. The so-called nanotechnology refers to the use of a number of molecules or atoms composed of units-nano particles, the science and technology of manufacturing materials or micro devices. Nanoparticles refer to fine particles of metal or semiconductor with a size between 1 and 100 nm. The special structure level of nanoparticles gives it many special properties and functions. Nanoparticles have a large specific surface area. The number of surface atoms, surface energy and surface tension increase sharply with the decrease of particle size, surface effect and small size effect. The thermal, magnetic, optical, sensitive properties and surface stability of nanoparticles are di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C30B29/52C30B7/10
Inventor 周士青温鸣程明珠孟祥国
Owner TONGJI UNIV
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