Method for preparing Ni/Fe bi-metal face-centered cubic crystal nano particles

A face-centered cubic and nano-particle technology, applied in the field of nano-materials, can solve problems such as pollution and difficult degradation, and achieve the effects of strong process controllability, difficult polymerization, and uniform dispersion polymerization

Inactive Publication Date: 2015-10-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The United Nations Environment Program listed it as one of the 12 persistent toxic organic pollutants for global priority control, and most industrialized countries have stopped producing PCBs after the 1970s, but due to their stable nature, it is not easy to Degraded in the environment, PCBs will continue to pollute the environment for a long time

Method used

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  • Method for preparing Ni/Fe bi-metal face-centered cubic crystal nano particles
  • Method for preparing Ni/Fe bi-metal face-centered cubic crystal nano particles
  • Method for preparing Ni/Fe bi-metal face-centered cubic crystal nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Dissolve 4g of PVP (K30) in deionized water, mix thoroughly by magnetic stirring, and set the volume to 50ml to obtain a PVP solution with a mass volume concentration of 8%.

[0026] (2) Take 7.5ml of the PVP solution as described in (1) and dissolve it in the mixed solution of deionized water and absolute ethanol, transfer it into a three-necked bottle, and pass nitrogen to remove oxygen for 30 minutes. The total volume of the solution is 50ml, PVP solution is 7.5ml, deionized water is 22.5ml, ethanol is 20ml, and the volume ratio is 3:9:8.

[0027] (3) Weigh 0.417g FeSO 4 ·7H 2 O powder was added to the above solution, and mixed for 20 minutes under the condition of mechanical stirring at a speed of 2000r / min, so that FeSO 4 ·7H 2 O powder is fully dissolved, at this time FeSO 4 ·7H 2 The molar concentration of O is 0.03 mol / L.

[0028] (4) Slowly add NaBH dropwise to the three-necked bottle 4 solution, according to n(Fe 2+ ) and n(BH 4 — ) ratio 1:2, Na...

Embodiment 2

[0033] (1) Dissolve 5g of PVP (K30) in deionized water, mix thoroughly by magnetic stirring, and set the volume to 50ml to obtain a PVP solution with a mass volume concentration of 10%.

[0034] (2) Take 7.5ml of the PVP solution as described in (1) and dissolve it in the mixed solution of deionized water and absolute ethanol, transfer it into a three-necked bottle, and pass nitrogen to remove oxygen for 30 minutes. The total volume of the solution is 50ml, PVP solution is 7.5ml, deionized water is 22.5ml, ethanol is 20ml, and the volume ratio is 3:10:10.

[0035] (3) Weigh 0.417g FeSO 4 ·7H 2 O powder was added to the above solution, and mixed for 15 minutes under the condition of mechanical stirring at a speed of 2000r / min, so that FeSO 4 ·7H 2 O powder is fully dissolved, at this time FeSO 4 ·7H 2 The molar concentration of O is 0.03 mol / L.

[0036] (4) Slowly add NaBH dropwise to the three-necked bottle 4 solution, according to n(Fe 2+ ) and n(BH 4 — ) ratio 1:2,...

Embodiment 3

[0041] (1) Dissolve 5g of PVP (K30) in deionized water, mix thoroughly by magnetic stirring, and set the volume to 50ml to obtain a PVP solution with a mass volume concentration of 10%.

[0042] (2) Take 7.5ml of the PVP solution as described in (1) and dissolve it in the mixed solution of deionized water and absolute ethanol, transfer it into a three-necked bottle, and pass nitrogen to remove oxygen for 30 minutes. The total volume of the solution is 50ml, PVP solution is 7.5ml, deionized water is 22.5ml, ethanol is 20ml, and the volume ratio is 3:9:9.

[0043] (3) Weigh 0.417g FeSO 4 ·7H 2 O powder was added to the above solution, and mixed for 20 minutes under the condition of mechanical stirring at a speed of 2000r / min, so that FeSO 4 ·7H 2 O powder is fully dissolved, at this time FeSO 4 ·7H 2 The molar concentration of O is 0.03 mol / L.

[0044] (4) Slowly add NaBH dropwise to the three-necked bottle 4 solution, according to n(Fe 2+ ) and n(BH 4 — ) ratio 1:2, N...

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Abstract

The invention discloses Ni / Fe double-metal face-centered cubic crystal nano-particles and a preparing method and application thereof. The liquid phase reduction method is adopted, PVP is used as a stabilizer, NaBH4 is used as a reducing agent, ferrous ions and nickle ions are added step by step for reduction, prepared Ni / Fe double-metal nano-particles are of a regular face-centered cubic structure, particle size distribution is even, particle size is large than the surface area, stability is good, and the polymerism can not easily happen. The prepared nano-particles can effectively catalyze and degrade polychlorinated biphenyl. Needed reaction equipment of the nano-particles is simple, equipment cost is low, the preparation process is high in controllability and simple in operation, the reaction condition is mild, and further industrial production is possible.

Description

[0001] The application of the present invention is a divisional application of the parent application "Ni / Fe bimetallic face-centered cubic crystal nanoparticles and its preparation method and application". The application number of the parent application is 201410008400.7, and the filing date is January 2, 2014. technical field [0002] The invention belongs to the technical field of nanomaterials. More specifically, it relates to a method for preparing face-centered cubic nanocrystal particles, in particular to a method for preparing Ni / Fe bimetallic face-centered particles using PVP as a macromolecular template and using a liquid phase reduction method. Cubic Nanocrystalline Particles Method. Background technique [0003] Polychlorinated Biphenyls (PCBs) are typical persistent organic pollutants in the environment. Because of its high chemical inertness, thermal stability, flame retardancy, thermal conductivity and insulation, it has been widely used in the fields of elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 毛国柱赵林丁舒吕倩倩齐云
Owner TIANJIN UNIV
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