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Preparation methods and applications of graphene oxide composite and nickel oxide supported graphene composite

Active Publication Date: 2014-07-23
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In recent years, although studies have shown that graphene can remove pollutants in water, the agglomeration of graphene not only reduces the specific surface area of ​​graphene, but also is not conducive to dispersion in solution, which limits its ability to remove pollutants in aqueous solution. removal app for

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  • Preparation methods and applications of graphene oxide composite and nickel oxide supported graphene composite
  • Preparation methods and applications of graphene oxide composite and nickel oxide supported graphene composite
  • Preparation methods and applications of graphene oxide composite and nickel oxide supported graphene composite

Examples

Experimental program
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Embodiment 1

[0045] The preparation method of the composite graphene oxide adsorbent of the present embodiment may further comprise the steps:

[0046] (1) Disperse graphene oxide in water, and obtain a graphene oxide suspension with a concentration of 4 mg / mL after ultrasonic dispersion for 30 minutes;

[0047] The graphene oxide of this example was synthesized by the modified Hummers method, and the specific steps were as follows: slowly add 10 g of graphite and 5 g of sodium nitrate into a flask containing 230 mL of concentrated sulfuric acid, and stir in an ice-water mixture. After 30 min, slowly add 30 g of potassium permanganate, during the stirring process, control the reaction temperature to always be less than 15°C, and keep it for 90 min; transfer the reaction system to a constant temperature water bath at 35°C, keep the reaction temperature at 35°C, and stir for 30 min; Add 460mL of deionized water, control the reaction temperature at 90°C, and stir for 30 min; then add 100mL of...

Embodiment 2

[0059] The preparation method of the composite graphene oxide adsorbent of the present embodiment may further comprise the steps:

[0060] (1) Disperse graphene oxide (prepared by the preparation method in Example 1) in water, and obtain a graphene oxide suspension with a concentration of 6 mg / mL after ultrasonic dispersion for 60 minutes;

[0061] (2) adding camphor wood chips and carboxymethyl cellulose to the graphene oxide suspension obtained in step (1); wherein the mass ratio of graphene oxide, camphor wood chips and carboxymethyl cellulose is 2:1:6, Stir well, react at 50°C for 5 hours, and obtain a reaction solution after complete reaction;

[0062] (3) The mixture obtained after step (2) is subjected to suction filtration, washing and freeze-drying to obtain a composite graphene oxide adsorbent.

[0063] The preparation method of the nickel oxide-supported graphene composite of the present embodiment may further comprise the steps:

[0064] (1) Add the composite gra...

Embodiment 3

[0069] The preparation method of the composite graphene oxide adsorbent of the present embodiment may further comprise the steps:

[0070] (1) Disperse graphene oxide (prepared by the preparation method in Example 1) in water, and obtain a graphene oxide suspension with a concentration of 5 mg / mL after ultrasonic dispersion for 45 minutes;

[0071] (2) adding camphor wood chips and carboxymethyl cellulose to the graphene oxide suspension obtained in step (1); wherein the mass ratio of graphene oxide, camphor wood chips and carboxymethyl cellulose is 2:1:5, Stir well, react at 52°C for 4 hours, and obtain a reaction solution after complete reaction;

[0072] 3) The mixture obtained after step (2) is subjected to suction filtration, washing and freeze-drying to obtain a composite graphene oxide adsorbent.

[0073] The preparation method of the nickel oxide-supported graphene composite of the present embodiment may further comprise the steps:

[0074] (1) Add the composite grap...

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Abstract

The invention discloses preparation methods and applications of a graphene oxide composite and a nickel oxide supported graphene composite. The graphene oxide composite contains graphene oxide, camphor wood chips and carboxymethyl cellulose. The preparation method of the graphene oxide composite comprises the following steps: dispersing graphene oxide in water, adding camphor wood chips and carboxymethyl cellulose, stirring, and performing suction filtration, washing and freeze-drying, thereby obtaining a composited graphene oxide adsorbent. The nickel oxide supported graphene composite comprises nickel oxide, graphene oxide, camphor wood chips and carboxymethyl cellulose. The preparation method of the nickel oxide supported graphene composite comprises the following steps: adding composited graphene oxide into a nickel-containing aqueous solution; after adsorption to saturation, adding a reducing agent; and performing suction filtration, washing and freeze-drying, thereby obtaining the nickel oxide supported graphene composite. The composited graphene oxide adsorbent and the nickel oxide supported graphene composite have the characteristics of being efficient, green, economic and environmentally friendly; besides, the preparation methods with easily-controlled conditions are simple, and suitable to large-scaled production.

Description

technical field [0001] The invention relates to the field of inorganic and organic pollutant adsorbents, in particular to a preparation method and application of graphene oxide composites and nickel oxide-loaded graphene composites. Background technique [0002] Due to the rapid development of industry and the continuous improvement of people's living standards, the pollution of heavy metal wastewater to the environment is becoming more and more serious. In an environment polluted by a large amount of nickel, skin diseases will occur frequently. Powdered nickel and carbon monoxide will combine to form nickel tetracarbonyl. After entering the human body through the respiratory tract, pulmonary hemorrhage, edema, fatty degeneration of capillary walls complicated by respiratory disorders, and respiratory system cancers will occur. Four Nickel carbonyl has been identified as a carcinogen. After gradually realizing the harm of heavy metal nickel pollution to the environment, es...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58C02F1/62
Inventor 罗汉金吴艳王侯
Owner SOUTH CHINA UNIV OF TECH
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