Preparing method for range limiting type nanometer zero-valent iron-nickel composite

A nano-zero-valent iron and complex technology, applied in metal processing equipment, transportation and packaging, etc., to prevent surface passivation, prevent agglomeration, and promote the effective transfer of electrons to the surface of contaminants

Active Publication Date: 2019-04-05
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of agglomeration and passivation of nano bimetallic particles in the prior art, and to provide a method for preparing a confined nanometer zero-valent iron-nickel compound, which is simple and the obtained confined nanometer zerovalent iron The nickel complex has significantly enhanced reductive dechlorination performance on organochlorine pollutants, and does not agglomerate passivation

Method used

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  • Preparing method for range limiting type nanometer zero-valent iron-nickel composite

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Effect test

Embodiment 1

[0023] A method for preparing a confined nanometer zero-valent iron-nickel composite, comprising the steps of:

[0024] (1) Ferric nitrate and nickel nitrate are dissolved in 20mL of organic solvent N,N-dimethylformamide in a molar ratio of 2:1 to obtain solution A, and the organic ligand ethylenediaminetetraacetic acid (with moles of iron salt ratio of 0.5:1) was dissolved in 20mL N,N-dimethylformamide to obtain solution B;

[0025] (2) Add solution A to solution B quickly, stir evenly, and centrifuge, wash the solid obtained after centrifugation with DMF, and then vacuum dry at 60°C to obtain the iron-nickel complex;

[0026] (3) Put the iron-nickel complex in a tube furnace, in a nitrogen atmosphere, control the heating rate to 2°C / min, the gas flow rate to 50mL / min, raise the temperature to 1000°C, keep the temperature for calcination for 3h, and then cool to room temperature , that is.

[0027] figure 1 The transmission electron microscope image of the confinement-type...

Embodiment 2

[0029] A method for preparing a confined nanometer zero-valent iron-nickel composite, comprising the steps of:

[0030] (1) Ferric chloride and nickel chloride are dissolved in 20mL of organic solvent N,N-dimethylformamide at a molar ratio of 5:1 to obtain solution A, and the organic ligand terephthalic acid (with iron salt) The molar ratio is 1:1) was dissolved in 20mLN,N-dimethylformamide to obtain solution B;

[0031] (2) Add solution A to solution B quickly, stir evenly, and centrifuge, wash the solid obtained after centrifugation with DMF, and then vacuum dry at 60°C to obtain the iron-nickel complex;

[0032] (3) Put the iron-nickel complex in a tube furnace, in a nitrogen atmosphere, control the heating rate to 5°C / min, the gas flow rate to 50mL / min, raise the temperature to 800°C, keep the temperature for calcination for 2h, and then cool to room temperature , that is.

Embodiment 3

[0034] A method for preparing a confined nanometer zero-valent iron-nickel composite, comprising the steps of:

[0035] (1) Ferric sulfate and nickel sulfate are dissolved in 20mL organic solvent N,N-dimethylformamide in molar ratio 10:1, obtain solution A, organic ligand triethylamine (the molar ratio with iron salt is 0.8:1) was dissolved in 20mL N,N-dimethylformamide to obtain solution B;

[0036] (2) Add solution A to solution B quickly, stir evenly, and centrifuge, wash the solid obtained after centrifugation with DMF, and then vacuum dry at 60°C to obtain the iron-nickel complex;

[0037] (3) Put the iron-nickel complex in a tube furnace, in a nitrogen atmosphere, control the heating rate to 1°C / min, the gas flow rate to 50mL / min, raise the temperature to 600°C, keep the temperature for calcination for 1h, and then cool to room temperature , that is.

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Abstract

The invention relates to a preparing method for a range limiting type nanometer zero-valent iron-nickel composite, and belongs to the technical field of environmental protection. Iron salt and nickelsalt are firstly dissolved in an organic solvent to obtain a solution A, and an organic ligand is dissolved in a same organic solvent to obtain a solution B; then the solution A is quickly added intothe solution B, centrifugal separation is carried out after even stirring, solid obtained after centrifugal separation is washed with DMF, and then vacuum drying is carried out on the solid to obtainan iron-nickel complex; and finally the iron-nickel complex is calcined at high temperature in an inert gas atmosphere and is then cooled to room temperature to obtain the iron-nickel composite. The method is simple, the prepared range limiting type nanometer zero-valent iron-nickel composite has the obvious and enhanced dechlorination performance on organic chloride pollutants, agglomeration passivation can be avoided, and the problem of agglomeration passivation of nano-bimetallic particles in the prior art is solved.

Description

technical field [0001] The invention relates to a method for preparing a mesoporous graphene adsorption material, in particular to a method for preparing a confined nanometer zero-valent iron-nickel compound, which belongs to the technical field of environmental protection. Background technique [0002] Chlorinated organic compounds are widely used in machinery manufacturing, chemical production and other industries. Most chlorinated organic compounds have low water solubility and high octanol-water partition coefficient. After entering the environment, they are difficult to degrade naturally in a short period of time, and can migrate and deposit over long distances. They are easy to accumulate in organisms and can accumulate through the food chain. Cause serious environmental pollution and long-term ecological damage consequences. [0003] Due to its unique surface effect and small size effect, nano-zero-valent iron has high reactivity, and has become an effective method f...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00
CPCB22F9/24B22F1/054
Inventor 王慧杨钰杰全桂香严金龙单良
Owner YANCHENG INST OF TECH
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