Linear Cu-Ni alloy nanocrystal and synthesis method thereof

A technology of alloy nanocrystals and synthesis methods, which is applied in the field of metal nano-controllable synthesis, can solve the problems of low potential of transition metals, difficulty in controlling reaction kinetics, and rarely reported controllable synthesis of bimetallic nanocrystals, so as to improve catalytic performance. Active, good active effect

Inactive Publication Date: 2018-08-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the controllable synthesis of bimetallics, the controlled synthesis of bimetallic nanocrystals of transition metals has rarely been reported.
This is mainly due to the relatively low potential of transition metals, which requires a strong reducing agent to reduce transition metal ions to zero-valent atoms in the process of nucleation and growth, and adding a reducing agent with strong reducing performance will make the reaction kinetics process difficult. control

Method used

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  • Linear Cu-Ni alloy nanocrystal and synthesis method thereof
  • Linear Cu-Ni alloy nanocrystal and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Preparation of linear Cu-Ni alloy nanocrystal catalyst for catalytic oxidation of organic waste gas

[0019] 1. Preparation of linear Cu-Ni alloy nanocrystals

[0020] Dissolve 0.1mmol copper acetylacetonate, 0.1mmol nickel acetylacetonate and 0.1mmol / L polyvinylpyrrolidone PVP in 15ml benzyl alcohol and stir for 10min, add 0.5ml aniline dropwise during the stirring process, and then perform ultrasonic treatment for 10min Allow the solution to mix well. After sonication, the mixed solution was transferred into a 25ml autoclave and maintained at 200°C for 12h. Naturally cooled to room temperature, the obtained product was washed with acetone and centrifuged for 8 min at a centrifugal speed of 10000 r / min, and then washed several times with a mixture of absolute ethanol and acetone. Finally, the product obtained by centrifugation was put into a freeze-drying box to dry.

[0021] 2. Prepare the supported catalyst and conduct the degradation test of organic was...

Embodiment 2

[0025] Example 2 Preparation of linear Cu-Ni alloy nanocrystals Catalytic reduction of methylene blue

[0026] 1. Preparation of linear Cu-Ni alloy nanocrystals

[0027] Dissolve 0.15mmol copper acetylacetonate, 0.075mmol nickel acetylacetonate and 0.2mmol / L polyvinylpyrrolidone PVP in 15ml benzyl alcohol and stir for 10min, add 1ml aniline dropwise during the stirring process, and then perform ultrasonic treatment for 10min The solution is mixed well. After sonication, the mixed solution was transferred into a 25ml autoclave and maintained at 175°C for 8h. Naturally cooled to room temperature, the obtained product was washed with acetone and centrifuged for 8 min at a centrifugal speed of 10000 r / min, and then washed several times with a mixture of absolute ethanol and acetone. Finally, the product obtained by centrifugation was put into a freeze-drying box to dry.

[0028] 2. Catalytic reduction of methylene blue test

[0029] Add 2ml NaBH to 100mL methylene blue 4 , an...

Embodiment 3

[0030] Example 3 Preparation of Linear Cu-Ni Alloy Nanocrystal Catalyst Catalyzing p-Nitrophenol

[0031] 1. Preparation of linear Cu-Ni alloy nanocrystals

[0032] Dissolve 0.225mmol copper acetylacetonate, 0.45mmol nickel acetylacetonate and 0.3mmol / L polyvinylpyrrolidone PVP in 15ml benzyl alcohol and stir for 10min, add 1.5ml aniline dropwise during the stirring process, and then perform ultrasonic treatment for 10min Allow the solution to mix well. After sonication, the mixed solution was transferred into a 25ml autoclave and maintained at 220°C for 16h. Naturally cooled to room temperature, the obtained product was washed with acetone and centrifuged for 8 min at a centrifugal speed of 10000 r / min, and then washed several times with a mixture of absolute ethanol and acetone. Finally, the product obtained by centrifugation was put into a freeze-drying box to dry.

[0033] 2. Catalytic hydrogenation reaction of p-nitrophenol

[0034]Weigh 2.0g of p-nitrophenol, 0.08g o...

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Abstract

The invention discloses a linear Cu-Ni alloy nanocrystal and a synthesis method thereof. The nanocrystal is linear and has a face-centered cubic structure. According to the synthesis method, polyvinylpyrrolidone (PVP) is used as a coating agent, aniline is used as a reducing agent, and PVP, aniline, copper acetylacetonate and nickel acetylacetonate are dissolved in benzyl alcohol, and a solvothermal process is carried out so as to prepare the nanocrystal. Results show that nanoparticles can directionally form a linear nanostructure through addition of a proper amount of PVP and a small amountof aniline; certain special exposed crystal faces and a large amount of twinning dislocations exist and can provide more active sites for the nanocrystal; and when used as a catalyst, the nanocrystalcan effectively treat exhaust gas and realize degradation of organic matters in waste water. The success of the preparation method for the nanocrystal is of certain theoretical and practical significance to morphology-controllable synthesis of nanocrystals, controllable synthesis of transition-metal and double-metal nanocrystals and application of the catalysis performance of nanocrystals with special morphology.

Description

technical field [0001] The invention relates to the field of metal nano-controllable synthesis, and more specifically relates to a linear Cu-Ni alloy nanocrystal and a synthesis method thereof. The nanocrystal can be used in catalytic fields such as catalytic oxidation of waste gas and degradation of organic matter in wastewater. Background technique [0002] The special properties of nanomaterials drive researchers to devote themselves to the synthesis of various nanoparticles, trying to change the physical and chemical properties of nanoparticles by changing the shape and size of nanoparticles. Catalysts provide a viable theoretical basis. Bimetallic nanocrystals are composed of two different metal elements, which not only retain the special properties of each component, but also have the singular effect produced by the synergy between heterogeneous atoms. Since the bimetal composed of two different metals has a common energy band of two components, by changing the compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J29/46B01J35/02B01J37/16B01J37/32B01J37/34B22F1/00B22F9/24C07C213/02C07C215/76
CPCC07C213/02B01J23/755B01J29/46B01J35/02B01J37/16B01J37/32B01J37/343B22F9/24B01J2229/18B22F1/0547B22F1/07C07C215/76
Inventor 吴东方胡利冲谭清清
Owner SOUTHEAST UNIV
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