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Catalytic degradation method of phenolic wastewater by graphene quantum dots/ferric oxide composite

A technology of graphene quantum dots and ferroferric oxide, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low degradation efficiency and low activity of phenols, Achieve the effects of low cost, simple preparation process and wide application prospects

Active Publication Date: 2014-10-29
南通市埃唯卡新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, most of them are used in sensitive electrochemical detection or immunosensing, which is difficult to use in industry
Some other carbon materials or iron oxide materials, although low in cost, have very little activity
However, some composites of iron oxides and carbon materials, although their activity is slightly improved compared with individual carbon materials or iron oxide materials, their phenolic degradation efficiency is still very low.
At present, there is no report on the use of enzyme mimics to obtain high-efficiency phenol degradation

Method used

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  • Catalytic degradation method of phenolic wastewater by graphene quantum dots/ferric oxide composite
  • Catalytic degradation method of phenolic wastewater by graphene quantum dots/ferric oxide composite
  • Catalytic degradation method of phenolic wastewater by graphene quantum dots/ferric oxide composite

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Experimental program
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Embodiment 1

[0023] Preparation of graphene quantum dots / ferric oxide composite: 0.315mL containing 0.0675gFeCl 3 ·6H 2 O, 0.03475g FeSO 4 ·7H 2 O and 10.33 μL of 37% hydrochloric acid deoxygenated ultrapure water were slowly added dropwise to 30 mL of deoxygenated ultrapure water containing 29.0 mg of graphene quantum dots at pH 9.0, and the mixed solution was mechanically stirred for 2 hours in a nitrogen atmosphere, and the reaction temperature was controlled at 25°C. The reaction solution was centrifuged to separate the precipitate, washed three times with water, and then dispersed in water to obtain the product.

[0024] The degradation process of graphene quantum dots / ferric oxide complexes on phenolic compounds: 10 μg graphene quantum dots / ferric oxide complexes with 6mM phenol, 30mM hydrogen peroxide in 1mL 0.1M sodium acetate buffer (pH 3.5 ) were mixed evenly, and the mixed solution was reacted at 30° C. for 3 hours.

[0025] Determination of the degradation efficiency of ph...

Embodiment 2

[0027] Preparation of graphene quantum dots / ferric oxide composite: 0.315mL containing 0.0675gFeCl 3 ·6H 2 O, 0.03475g FeSO 4 ·7H 2 O and 10.33 μL of 37% hydrochloric acid deoxygenated ultrapure water were slowly added dropwise to 30 mL of deoxygenated ultrapure water containing 29.0 mg of graphene quantum dots at pH 9.0, and the mixed solution was mechanically stirred in a nitrogen atmosphere for 2 hours. Controlled at 25°C. The reaction solution was centrifuged to separate the precipitate, washed three times with water, and then dispersed in water to obtain the product.

[0028] Degradation process of phenolic compounds by graphene quantum dots / Fe3O4 composite: 10 μg graphene quantum dots-Fe3O4 composite with 6mM 4-chlorophenol, 30mM hydrogen peroxide in 1mL 0.1M sodium acetate buffer (pH 3.5) were mixed evenly, and the mixed solution was reacted at 30° C. for 3 hours.

[0029] Determination of the degradation efficiency of phenolic compounds by the graphene quantum dot...

Embodiment 3

[0031] Preparation of graphene quantum dots / ferric oxide composite: 0.315mL containing 0.0675gFeCl 3 ·6H 2 O, 0.03475g FeSO 4 ·7H 2 O and 10.33 μL of 37% hydrochloric acid deoxygenated ultrapure water were slowly added dropwise to 30 mL of deoxygenated ultrapure water containing 29.0 mg of graphene quantum dots at pH 9.0, and the mixed solution was mechanically stirred in a nitrogen atmosphere for 2 hours. Controlled at 25°C. The reaction solution was centrifuged to separate the precipitate, washed three times with water, and then dispersed in water to obtain the product.

[0032] Degradation process of phenolic compounds by graphene quantum dots / Fe3O4 composite: 10μg graphene quantum dots / Fe3O4 composite with 6mM 4-methoxyphenol, 30mM hydrogen peroxide in 1mL 0.1M sodium acetate The buffer solution (pH 3.5) was mixed evenly, and the mixed solution was reacted at 30° C. for 3 hours.

[0033]Determination of the degradation efficiency of phenolic compounds by the graphene ...

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Abstract

The invention relates to a method for degrading phenolic wastewater under the catalysis of a graphene quantum dot / ferroferric oxide composite. The method comprises the following steps of: controlling the pH value of phenolic compound contained wastewater at 2-6, then adding the graphene quantum dot / ferroferric oxide composite and hydrogen peroxide into the wastewater, controlling the temperature at 10-80 DEG C, and reacting for 5-300min to finish the degradation of the phenolic compound in the wastewater. Compared with the prior art, the catalyst adopted by the invention is simple in preparation process, low in cost, higher in degradation efficiency for various phenolic compounds, and suitable for high-concentration phenolic pollutant contained wastewater generated by typical industries.

Description

technical field [0001] The present invention relates to a method for degrading phenolic wastewater, in particular to the use of graphene quantum dots / ferric oxide complexes to simulate catalase as a catalyst to degrade wastewater containing phenolic compounds in the presence of hydrogen peroxide method of catalytic degradation. Background technique [0002] Phenolic compounds include phenol, cresol, chlorophenol, etc. Phenol-containing wastewater is a kind of industrial wastewater with great harm and wide range of pollution. Most phenols are harmful to the human body. Long-term exposure to phenol-contaminated water will lead to chronic poisoning and carcinogenicity. Therefore, the degradation of phenols and the reduction of phenol pollution have attracted widespread attention. Enzymes are proteins, RNA or their complexes that catalyze specific chemical reactions, and have the characteristics of high catalytic efficiency, strong specificity, and mild action conditions. Due...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00
Inventor 吴海霞吴晓晨郭守武赵觉新
Owner 南通市埃唯卡新材料有限公司