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Adsorbent based on graphene oxide as well as preparation method and application thereof

A graphene and adsorbent technology, applied in the field of graphene oxide composite material preparation, can solve the problems of difficult removal and high cost, and achieve the effect of reducing the use cost and improving the application value

Inactive Publication Date: 2020-05-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to propose a graphene oxide-based adsorbent and its preparation method and application for the current graphene oxide composite material, which has a high cost and is difficult to remove after adsorption.

Method used

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  • Adsorbent based on graphene oxide as well as preparation method and application thereof
  • Adsorbent based on graphene oxide as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of preparation method based on graphene oxide adsorbent, concrete steps are as follows:

[0039] (1) 1g of graphene oxide prepared by the Hummers method was added to 500mL of deionized water, and ultrasonically treated for 24h to obtain a uniformly dispersed graphene oxide solution;

[0040] (2) adding 4 g of magnesium-aluminum hydrotalcite prepared by the hydrothermal synthesis method into the graphene oxide solution described in step (1), ultrasonically treating for 1 h, and then stirring for 2 h with a stirring paddle to obtain a mixed solution;

[0041] (3) The mixed solution described in step (2) is left to stand for 24h, and it can be observed that graphene oxide and hydrotalcite co-precipitate, and the solution is stratified. Graphene oxide-based adsorbents.

[0042] The infrared spectrogram of the adsorbent based on graphene oxide that embodiment 1 makes is as figure 1 shown.

[0043] The graphene oxide-based adsorbent obtained in Example 1 is used in ...

Embodiment 2

[0048] A kind of preparation method based on graphene oxide adsorbent, concrete steps are as follows:

[0049] (1) 1g of graphene oxide prepared by the Hummers method was added to 500mL of deionized water, and ultrasonically treated for 12h to obtain a uniformly dispersed graphene oxide solution;

[0050] (2) adding 9 g of magnesium-aluminum hydrotalcite prepared by the hydrothermal synthesis method into the graphene oxide solution described in step (1), ultrasonically treating it for 2 h, and then stirring with a stirring paddle for 4 h to obtain a mixed solution;

[0051] (3) The mixed solution described in step (2) was left to stand for 12h, and it could be observed that graphene oxide and hydrotalcite co-precipitated, and the solution was stratified, and the supernatant was poured out, vacuum-dried, and the lower sediment was ground to obtain the obtained Graphene oxide-based adsorbents.

[0052] The adsorbent based on graphene oxide that embodiment 2 makes has good remov...

Embodiment 3

[0054] A kind of preparation method based on graphene oxide adsorbent, concrete steps are as follows:

[0055] (1) Add 1g of graphene oxide prepared by the Hummers method into 500mL of deionized water, and perform ultrasonic treatment for 48h to obtain a uniformly dispersed graphene oxide solution;

[0056] (2) adding 19g of magnesium-aluminum hydrotalcite prepared by the hydrothermal synthesis method into the graphene oxide solution described in step (1), ultrasonically treating it for 4h, and then stirring with a stirring paddle for 8h to obtain a mixed solution;

[0057] (3) The mixed solution described in step (2) was left to stand for 18h, and it could be observed that graphene oxide and hydrotalcite co-precipitate, and the solution was stratified, and the supernatant was poured out, vacuum-dried, and the lower sediment was ground to obtain the obtained Graphene oxide-based adsorbents.

[0058] The adsorbent based on graphene oxide that embodiment 3 makes has good remova...

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Abstract

The invention discloses an adsorbent based on graphene oxide as well as a preparation method and application of the adsorbent. The adsorbent provided by the invention has a good adsorption effect on water pollutants. The method comprises the steps: firstly, graphene oxide prepared by a Hummers method is ultrasonically dispersed into water; hydrotalcite prepared by a hydrothermal synthesis method is added into the graphene oxide aqueous solution with good dispersity and stirred; the graphene oxide with negative charges is intercalated into hydrotalcite layers due to the electrostatic effect, and can be co-precipitated with hydrotalcite, the mixed solution is left to stand for layering, a supernatant is poured out, and the lower-layer precipitate is dried to obtain the graphene oxide-hydrotalcite composite material, so that the agglomeration phenomenon of the graphene oxide can be effectively reduced. According to the preparation method, hydrotalcite is added into the graphene oxide solution, the operation is simple, the graphene oxide-hydrotalcite composite material is prepared, and as the agglomeration phenomenon of graphene oxide in the composite material is inhibited, the adsorption performance of the composite material is better.

Description

technical field [0001] The invention relates to the field of preparation of graphene oxide composite materials, in particular to a graphene oxide-based adsorbent and its preparation method and application. Background technique [0002] Graphene oxide (Graphene Oxide, GO) is the oxidation product of graphene, which can form negatively charged sheets in water, has a large specific surface area, and contains a variety of active oxygen-containing groups, which can provide more active sites. , so graphene oxide can be used as an adsorbent to remove various pollutants in wastewater, [0003] Hydrotalcite, also known as layered double hydroxides (LDH), is a naturally occurring layered clay material. The microstructure of LDH mainly includes main layer plates and interlayer anions, of which the main layer plate It is positively charged, and the interlayer anions are negatively charged. The two are assembled together in an orderly manner. The metal type and charge density on the mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/30
CPCB01J20/08B01J20/20B01J2220/42B01J2220/4806C02F1/281C02F1/283C02F2101/308
Inventor 戈明亮席壮壮
Owner SOUTH CHINA UNIV OF TECH
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