Core-shell magnetic poly(m-phenylene diamine) nano-particle, preparation method and application thereof

A poly-m-phenylenediamine and nanoparticle technology, which is applied in other chemical processes, chemical instruments and methods, alkali metal oxides/hydroxides, etc. Uniform loading of components, destruction of the lattice structure of magnetic particles, etc., to achieve the effects of controllable product morphology, easy solid-liquid separation, and simple operation process

Active Publication Date: 2015-02-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low chromium adsorption capacity makes it difficult for most existing magnetic nanomaterials to cope with the increasingly complex and large chromium-containing acidic industrial wastewater treatment
[0004] In the preparation process of magnetic core-shell composites, due to the lack of functional sites on the surface of magnetic nanoparticles, it is necessary to modify the surface of magnetic nanoparticles, such as concentrated acid treatment to make the surface rich in hydroxyl g

Method used

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  • Core-shell magnetic poly(m-phenylene diamine) nano-particle, preparation method and application thereof
  • Core-shell magnetic poly(m-phenylene diamine) nano-particle, preparation method and application thereof
  • Core-shell magnetic poly(m-phenylene diamine) nano-particle, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take Fe 3 o 4 Add 0.1g into a 150mL Erlenmeyer flask, add 50mL deionized water, and ultrasonically disperse for 10min. Weigh 0.025g of mPD (m-phenylenediamine monomer) and dissolve it in 10mL of deionized water. After dissolving, add ferric oxide dispersion and shake it in an ice-water bath to mix evenly. Weigh 0.055g of sodium persulfate oxidant and dissolve it in 10mL of deionized water, fully dissolve, add ferric oxide and mPD mixture, and continue shaking in ice-water bath for 5h. Take out the solution, magnetically separate, wash with water 3-4 times until the supernatant is colorless, and wash with ethanol twice. The washed sample was dried at 60°C, weighed, and collected. The sample mass was 0.1203g. The samples were used for TEM characterization as figure 1 As shown in A.

Embodiment 2

[0038] Take Fe 3 o 4Add 0.1g into a 150mL Erlenmeyer flask, add 50mL deionized water, and ultrasonically disperse for 10min. Weigh 0.05gmPD and dissolve it in 10mL deionized water. After dissolving, add ferric oxide dispersion, shake in ice water bath to mix evenly. Weigh 0.11g of sodium persulfate oxidant and dissolve it in 10mL of deionized water, fully dissolve, add ferric oxide and mPD mixture, and continue shaking in an ice-water bath for 5h. Take out the solution, magnetically separate, wash with water 3-4 times until the supernatant is colorless, and wash with ethanol twice. The washed sample was dried at 60° C., weighed, and collected. The sample mass was 0.1254 g. The samples were used for TEM characterization as figure 1 Shown in B.

Embodiment 3

[0040] Take Fe 3 o 4 Add 0.1g into a 150mL Erlenmeyer flask, add 50mL deionized water, and ultrasonically disperse for 10min. Weigh 0.1g mPD and dissolve it in 10mL deionized water. After dissolving, add ferric oxide dispersion, and shake it in an ice-water bath to mix it evenly. Weigh 0.22g of sodium persulfate oxidant and dissolve it in 10mL of deionized water, fully dissolve, add ferric oxide and mPD mixture, and continue shaking in ice-water bath for 5h. Take out the solution, magnetically separate, wash with water 3-4 times until the supernatant is colorless, and wash with ethanol twice. The washed sample was dried at 60°C, weighed, and collected. The sample mass was 0.1406g. The samples were used for TEM characterization as figure 1 C shown.

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Abstract

The invention discloses a core-shell magnetic poly(m-phenylene diamine) nano-particle, a preparation method and application thereof, and belongs to the field of synthesis and water treatment research on a magnetic composite material. The preparation method comprises the following steps: regarding ferroferric oxide as a core, regarding persulfate as an initiator, regulating and controlling the rate of polymerization of the m-phenylene diamine on the surface interface, and firstly realizing uniform packaging of poly(m-phenylene diamine) to the magnetic particle. The method can effectively control the shell thickness of poly(m-phenylene diamine); the product is uniform in morphology, controllable in size, and high in magnetism (127.33-73.78 emu g<-1>); the adsorption capability of the obtained composite magnetic particle to chromate is up to 239.5 mg g<-1>, and the magnetic particle is easy to separate out and recover.

Description

technical field [0001] The invention belongs to the field of synthesis of core-shell magnetic poly-m-phenylenediamine nanoparticles and water treatment thereof, and specifically relates to core-shell type Fe with one-step controllable synthesis 3 o 4 PmPD, its preparation method, and its application method for water body chromium adsorption. Background technique [0002] Industries such as electroplating, dyestuffs, organic synthesis, and light industry and textiles discharge a large amount of chromium-containing wastewater, which poses serious environmental pollution problems. It is urgent to develop efficient methods for the removal of chromium pollution. The current chromium removal methods are: physical method (membrane treatment method, ion exchange method), chemical method (barium salt method, reduction precipitation method, ferrite method), biological method and physical chemical method (electrolysis method, flotation method, adsorption method). Among them, the ads...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/0229B01J20/06B01J20/262B01J20/28009B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F2101/22
Inventor 柴立元王海鹰王婷张理源杨卫春杨志辉唐崇俭
Owner CENT SOUTH UNIV
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