A preparation method of nanometer zero-valent iron-based bimetallic/trimetallic material

A nano-zero-valent and bimetallic technology, applied in the direction of nanotechnology, can solve the problems of serious agglomeration, poor size controllability of nano-zero-valent iron-based bimetallic/trimetallic materials, and uneven particle size distribution, and achieve the cost of preparation Effect of low, micro mixing and mass transfer process enhancement, simple preparation method

Active Publication Date: 2021-02-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a method for preparing nano-zero-valent iron-based bimetallic / tri-metallic materials; through this method, nano-zero-valent iron-based materials with a one-dimensional size of 10-20nm and uniform particle size distribution can be prepared. Bimetallic / trimetallic materials; solve the problems of poor size controllability, uneven particle size distribution and serious agglomeration of nano zero-valent iron-based bimetallic / trimetallic materials prepared by existing methods, and the preparation method Simple process, low cost, and large-scale production

Method used

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  • A preparation method of nanometer zero-valent iron-based bimetallic/trimetallic material
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  • A preparation method of nanometer zero-valent iron-based bimetallic/trimetallic material

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Embodiment 1

[0045] A method for preparing a nanometer zero-valent iron-based bimetallic / trimetallic material, comprising the steps of:

[0046] 1) FeSO in ethanol solution 4 ·7H 2 O, CuSO 4 ·5H 2 O is formulated into a metal salt mixed solution with a cation concentration of 0.05mol / L according to the theoretical mass Cu / Fe (w / w)=4%, and 10% PVP is added as a surfactant;

[0047] 2) In ethanol solution, according to Fe 2+ and The molar ratio is 1:3 to make sodium borohydride solution;

[0048] 3) Add the metal salt mixed solution and sodium borohydride solution into the liquid storage tanks A and B, and pass nitrogen gas to remove the oxygen in the solution, turn on the heating device to preheat the reaction solution to 30°C, start the peristaltic pump to convert the two The raw material liquid is transported to the liquid distributor through the flowmeter at the same time, and collides with each other at the nozzle of the distributor to form the impact area of ​​the fan-shaped fog...

Embodiment 2

[0054] A method for preparing a nanometer zero-valent iron-based bimetallic / trimetallic material, comprising the steps of:

[0055] 1) In ethanol solution, Fe(NO 3 ) 3 9H 2 O, AgNO 3 According to the theoretical mass of Ag / Fe (w / w)=6%, it is formulated into a metal salt mixed solution with a cation concentration of 0.05mol / L, and 10% CMC is added as a surfactant;

[0056] 2) In ethanol solution, according to Fe 3+ and The molar ratio is 1:4 to prepare potassium borohydride solution;

[0057] 3) Add the metal salt mixed solution and the potassium borohydride solution into the liquid storage tanks A and B, and pass nitrogen gas to remove the oxygen in the solution. Turn on the heating device to preheat the reaction solution to 30°C. Start the peristaltic pump to transport the two raw material liquids to the liquid distributor through the flow meter at the same time, and collide with each other at the nozzle of the distributor to form a fan-shaped fog surface impact area ...

Embodiment 3

[0061] A method for preparing a nanometer zero-valent iron-based bimetallic / trimetallic material, comprising the steps of:

[0062] 1) In ethanol solution, Fe 2 (SO 4 ) 3 , Pd(NO 3 ) 2 According to the theoretical mass of Pd / Fe (w / w) = 6%, the metal salt mixed solution with a cation concentration of 0.05 mol / L is prepared, and 5% SDS is added as a surfactant;

[0063] 2) In ethanol solution, according to Fe 3+ and The molar ratio is 1:4 to make sodium borohydride solution;

[0064] 3) Add the metal salt mixed solution and the sodium borohydride solution into the liquid storage tanks A and B, and pass nitrogen gas to remove the oxygen in the solution. Turn on the heating device to preheat the reaction solution to 30°C. Start the peristaltic pump to transport the two raw material liquids to the liquid distributor through the flow meter at the same time, and collide with each other at the nozzle of the distributor to form a fan-shaped fog surface impact area to complete ...

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Abstract

The invention discloses a preparation method of a nanometer zero-valent iron-based bimetallic / trimetallic material. The steps are as follows: simultaneously send a metal salt mixed solution and a reducing agent solution into a rotating packed bed of stainless steel wire mesh packing for reaction, and magnetically Select and separate the reaction product, wash it repeatedly with deionized water and absolute ethanol until neutral, and dry it in vacuum to obtain a nano-sized zero-valent iron-based bimetallic / trimetallic material with a particle size of 10-20nm. The preparation method of the present invention can produce a nanometer zero-valent iron-based bimetallic / trimetallic material with a one-dimensional size of 10-20nm and uniform particle size distribution; the prepared nanometer zerovalent iron-based bimetallic / trimetallic material is controllable in size, The particle size distribution is uniform without agglomeration, and the preparation process is simple, the cost is low, and it can be produced on a large scale.

Description

technical field [0001] The invention belongs to the field of energy-saving and environment-friendly technical materials, and in particular relates to a preparation method of a nanometer zero-valent iron-based bimetallic / trimetallic material. Background technique [0002] Nano-zero-valent iron is a zero-valent iron particle with a particle size between 1-100nm, which can be used to remove organic chlorides, inorganic anions, heavy metals, organic dyes, pesticides and other pollutants in water bodies. It is an environmental nanomaterial widely studied at present. . Due to its small particle size, large specific surface area and surface energy, compared with traditional iron powder materials, nano-zero-valent iron has better adsorption performance and reactivity. [0003] However, the stability of nano-zero-valent iron is poor, and it is easy to be oxidized and corroded in soil and groundwater to form a passivation layer, which makes the surface activity worse, reduces the rem...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor王洁欣汪正猛张亮亮陈建峰
OwnerBEIJING UNIV OF CHEM TECH