Diethylenetriamine-modified magnetic graphene oxide adsorbent as well as preparation method and application of diethylenetriamine-modified magnetic graphene oxide adsorbent

A technology of ethylenediene triamine and oxidized rock, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve secondary pollution, difficult separation and recovery, and hinder heavy metals Application and other issues, to achieve the effect of improved adsorption performance, high adsorption capacity, and good magnetic separation performance

Inactive Publication Date: 2018-09-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is difficult to separate and recover from the solution, which easily leads to secondary pollution
These disadvantages hinder its application in the removal of heavy metals

Method used

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  • Diethylenetriamine-modified magnetic graphene oxide adsorbent as well as preparation method and application of diethylenetriamine-modified magnetic graphene oxide adsorbent
  • Diethylenetriamine-modified magnetic graphene oxide adsorbent as well as preparation method and application of diethylenetriamine-modified magnetic graphene oxide adsorbent
  • Diethylenetriamine-modified magnetic graphene oxide adsorbent as well as preparation method and application of diethylenetriamine-modified magnetic graphene oxide adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation of the magnetic graphene oxide adsorbent modified by ethylenediene triamine, concrete steps are as follows:

[0038] (1) 0.3 g GO was gradually added into 100 g deionized water, and then sonicated for 1 hour to obtain solution A;

[0039] (2) Under stirring, FeCl 2 4H 2 O (0.257g) and FeCl 3 ·6H 2 O (0.699g) was dissolved in 100mL of deionized water to obtain mixed solution B;

[0040] (3) Then slowly add solution B to solution A, then add NH dropwise 3 ·H 2 O to adjust the pH to 9, keep the mixed solution at 70°C and keep stirring for 5 hours to obtain the mGO solution;

[0041] (4) The mGO solution obtained in step (3) was added to ethylenedienetriamine (5 mL), stirred continuously at 50 °C for 12 hours, then washed with methanol and deionized water successively, and dried in vacuum at 50 °C for 24 hours, The ethylenedienetriamine-modified magnetic graphene oxide adsorbent (DLTA-mGO) was obtained.

[0042] The prepared ethylenedienetriamine-modif...

Embodiment 2

[0044] The preparation of the magnetic graphene oxide modified by ethylenediene triamine, concrete steps are as follows:

[0045] (1) 0.4 g GO was gradually added into 150 g deionized water, and then sonicated for 1 hour to obtain solution A;

[0046] (2) Under stirring, FeCl 2 4H 2 O (0.257g) and FeCl 3 ·6H 2 O (0.699g) was dissolved in 100mL of deionized water to obtain mixed solution B;

[0047] (3) Then slowly add solution B to solution A, then add NH dropwise 3 ·H 2 O to adjust the pH to 10, keep the mixed solution at 80°C and keep stirring for 4 hours to obtain the mGO solution;

[0048] (4) The mGO solution obtained in step (3) was added to ethylenedienetriamine (8 mL), stirred continuously at 60 °C for 8 hours, then washed with methanol and deionized water successively, and dried in vacuum at 50 °C for 24 hours. The ethylenedienetriamine-modified magnetic graphene oxide adsorbent (DLTA-mGO) was obtained.

[0049] Adsorb the prepared ethylenedienetriamine-modifi...

Embodiment 3

[0051] The preparation of the magnetic graphene oxide modified by ethylenediene triamine, concrete steps are as follows:

[0052] (1) Add 0.5 g GO gradually to 200 g deionized water, and then sonicate for 1 hour to obtain solution A;

[0053] (2) Under stirring, FeCl 2 4H 2 O (0.257g) and FeCl 3 ·6H 2 O (0.699g) was dissolved in 100mL of deionized water to obtain mixed solution B;

[0054] (3) Then slowly add solution B to solution A, then add NH dropwise 3 ·H 2 O to adjust the pH to 11, keep the mixed solution at 90°C and keep stirring for 3 hours to obtain the mGO solution;

[0055] (4) The mGO solution obtained in step (3) was added to ethylenedienetriamine (10 mL), stirred continuously at 70 °C for 6 hours, then washed with methanol and deionized water successively, and dried in vacuum at 50 °C for 24 hours, The ethylenedienetriamine-modified magnetic graphene oxide adsorbent (DLTA-mGO) was obtained.

[0056] TEM image of unmodified graphene oxide Figure 2a As sh...

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PUM

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Abstract

The invention discloses a diethylenetriamine-modified magnetic graphene oxide adsorbent as well as a preparation method and application of the diethylenetriamine-modified magnetic graphene oxide adsorbent. The preparation method comprises the steps: firstly, introducing ferroferric oxide prepared by using a coprecipitation method to graphene oxide; then, reacting an amino group on diethylenetriamine with an epoxy group or carboxyl on the surface of graphene oxide; and carrying out graft modification on graphene oxide by using the amino group on diethylenetriamine to prepare the diethylenetriamine-modified magnetic graphene oxide adsorbent. The diethylenetriamine-modified magnetic graphene oxide adsorbent disclosed by the invention is a composite capable of adsorbing a large number of heavymetal ions and easy to separate and recover from wastewater and has a good application prospect on adsorbing and removing the heavy metal ions during wastewater treatment.

Description

technical field [0001] The invention relates to the field of metal preparation of graphene composite modified materials, in particular to a magnetic graphene oxide adsorbent modified by ethylenediene triamine and its preparation method and application. Background technique [0002] Since the Industrial Revolution, the rapid development of industrialization has resulted in the excessive loss of heavy metals, posing a direct threat to the ecological environment and human health. Cadmium, for example, is one of the most toxic heavy metal elements because it is mutagenic and teratogenic to organisms. Once excessive cadmium ions enter the human body, the main backlog will be in the liver, kidney, diarrhea and thyroid, causing organ damage and affecting the normal life of humans. Adsorption is considered an attractive method for the removal of heavy metals from aqueous solutions due to cost-effectiveness and ease of operation. Commonly used adsorbents such as activated carbon, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/30B01J20/20B01J2/06C02F1/28C02F101/20
CPCB01J2/06B01J20/20B01J20/28009C02F1/28C02F1/283C02F2101/20
Inventor 钟明峰吴文刚张志杰徐志魁
Owner SOUTH CHINA UNIV OF TECH
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