Heteroatom-rich functionalized graphene oxide composite material, preparation method and application thereof

A composite material and graphene technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as poor separation effect, low adsorption capacity, complicated operation, etc., and achieve good repeatability The effect of utilization performance, reduction of adsorption cost, and simple operation of the preparation process

Active Publication Date: 2022-07-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, researchers are focusing on the efficient enrichment of substances, selective separation and reusable use of materials in water treatment, and many three-dimensional composite materials have been synthesized by simple hydrothermal self-assembly methods, but the three-dimensional composite materials of hydrothermal physical assembly The material is loose and porous, the selectivity is small, and it is easy to fall off. In the process of adsorption and separation, there are also disadvantages such as complicated operation, poor separation effect and low adsorption capacity.

Method used

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  • Heteroatom-rich functionalized graphene oxide composite material, preparation method and application thereof
  • Heteroatom-rich functionalized graphene oxide composite material, preparation method and application thereof
  • Heteroatom-rich functionalized graphene oxide composite material, preparation method and application thereof

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Effect test

Embodiment 1

[0031] The preparation method of the heteroatom-rich functionalized graphene oxide composite material in the present embodiment is as follows:

[0032] S1. take flake graphite as raw material, adopt the Hummers method of modification to prepare graphene oxide, stand-by after freeze-drying;

[0033] S2. Measure 150 mL of anhydrous N,N-dimethylformamide (DMF) treated with molecular sieves in a 250 mL round-bottomed flask, add 1.1 g of graphene oxide obtained from S1, ultrasonicate for 30 min, and stir appropriately to make it Fully dissolve and seal for later use;

[0034] Weigh in turn 2.0g 2-amino-1,3,4-thiadiazole (ATD), 0.1g O-(7-azabenzotriazol-1-yl)-N,N,N',N' - Tetramethylurea hexafluorophosphate (HATU) is placed in the above-mentioned round-bottomed flask, sealed, ultrasonicated for 30min and stirred and mixed to obtain a mixed reaction solution;

[0035] The mixed reaction solution was transferred to a moisture-proof reflux device, heated to 140 ° C, and heated and ref...

Embodiment 2

[0038] The preparation method of the heteroatom-rich functionalized graphene oxide composite material in the present embodiment is as follows:

[0039] S1. take flake graphite as raw material, adopt the Hummers method of modification to prepare graphene oxide, stand-by after freeze-drying;

[0040] S2. Measure 90 mL of anhydrous N,N-dimethylformamide (DMF) treated with molecular sieves in a 250 mL round-bottomed flask and add 1.5 g of graphene oxide obtained by S1, ultrasonicate for 45 min, and stir appropriately to make it fully Dissolve and seal for later use;

[0041] Weigh in turn 3.0g 2-amino-1,3,4-thiadiazole (ATD), 0.8g O-(7-azabenzotriazol-1-yl)-N,N,N',N' - Tetramethylurea hexafluorophosphate (HATU) was placed in the above-mentioned round-bottomed flask, sealed, ultrasonicated for 45min and stirred and mixed to obtain a mixed reaction solution;

[0042] The mixed reaction solution was transferred to a moisture-proof reflux device, heated to 160 ° C, and heated and re...

Embodiment 3

[0045] The preparation method of the heteroatom-rich functionalized graphene oxide composite material in the present embodiment is as follows:

[0046] S1. take flake graphite as raw material, adopt the Hummers method of modification to prepare graphene oxide, stand-by after freeze-drying;

[0047] S2. Measure 120 mL of anhydrous N,N-dimethylformamide (DMF) treated with molecular sieves in a 250 mL round-bottomed flask and add 3.0 g of graphene oxide obtained by S1, ultrasonically for 60 min, and stir appropriately to make it fully Dissolve and seal for later use;

[0048] Weigh in turn 5.0g 2-amino-1,3,4-thiadiazole (ATD), 1.5g O-(7-azabenzotriazol-1-yl)-N,N,N',N' - Tetramethylurea hexafluorophosphate (HATU) was placed in the above-mentioned round-bottomed flask, sealed, ultrasonicated for 60 min and stirred and mixed to obtain a mixed reaction solution;

[0049] The mixed reaction solution was transferred to a moisture-proof reflux device, heated to 180 ° C, and heated and...

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Abstract

The invention relates to the technical field of composite materials, in particular to a heteroatom-rich functionalized graphene oxide composite material and a preparation method and application thereof. The composite material is effectively covalently coupled by the organic molecule 2-amino-1,3,4-thiadiazole rich in sulfur / nitrogen and graphene oxide, and the obtained composite material has a stable structure and good selectivity. The heteroatom functionalized graphene composite material has introduced heteroatom functional groups, has abundant adsorption active sites, can coordinate and chelate with heavy metal ions, realize the adsorption of heavy metals, and has good reusability.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a heteroatom-rich functionalized graphene oxide composite material and a preparation method and application thereof. Background technique [0002] Contaminants in water include metal ions, dyes, drugs, pesticides, organic compounds and other harmful compounds. Since these substances are not biodegradable, they accumulate in the organs of living organisms and induce dangerous diseases such as cancer. Heavy metal ions commonly found in industrial and drinking water, including arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb), nickel (Ni), selenium (Se) and zinc (Zn). The high levels of heavy metals in surface water and groundwater are mainly from natural and anthropogenic sources. Natural sources may come from volcanic eruptions and rock weathering, while anthropogenic sources may come from unrefined wastewater from the tanning, fertiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/22C02F1/283C02F1/285B01J2220/4806B01J2220/4812C02F2101/20
Inventor 于金刚蓝晰雯刘一平陈晓青
Owner CENT SOUTH UNIV
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