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Nitrogen-doped reduced graphene oxide nano composite material and preparation method and application thereof

A nano-composite material and graphene technology are applied in the field of nitrogen-doped reduced graphene oxide nano-composite materials and their preparation, and can solve the problems of high energy consumption and complex process.

Inactive Publication Date: 2020-07-14
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the preparation of nitrogen-doped reduced graphene oxide using chitosan as a nitrogen source in the prior art is complicated and consumes a lot of energy.

Method used

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  • Nitrogen-doped reduced graphene oxide nano composite material and preparation method and application thereof
  • Nitrogen-doped reduced graphene oxide nano composite material and preparation method and application thereof
  • Nitrogen-doped reduced graphene oxide nano composite material and preparation method and application thereof

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preparation example Construction

[0030] The invention provides a method for preparing a nitrogen-doped reduced graphene oxide nanocomposite material, comprising the following steps:

[0031] Chitosan, glacial acetic acid and water are mixed to obtain chitosan acetic acid aqueous solution;

[0032] Mixing graphene oxide and water to obtain a graphene oxide aqueous dispersion;

[0033] The chitosan acetic acid aqueous solution and graphene oxide aqueous dispersion are mixed, freeze-dried to obtain chitosan / graphene oxide powder;

[0034] The chitosan / graphene oxide powder is subjected to a thermal reduction reaction to obtain a nitrogen-doped reduced graphene oxide nanocomposite material.

[0035] In the present invention, unless otherwise specified, the raw materials used are conventional commercially available products in the field or prepared by conventional preparation methods in the field.

[0036] The invention mixes chitosan, glacial acetic acid and water to obtain chitosan acetic acid aqueous solution...

Embodiment 1～3

[0057] Weigh 1g of chitosan, 1mL of glacial acetic acid and 200mL of deionized water to prepare chitosan acetic acid aqueous solution; weigh 1g of graphene oxide and 200mL of deionized water, and ultrasonically disperse graphene oxide in deionized water to prepare graphene oxide The aqueous dispersion is ready for use.

[0058] According to the dropping speed of 2mL / min, the chitosan acetic acid aqueous solution was slowly added dropwise into the graphene oxide aqueous dispersion, and stirred for 10 hours at 60°C to form a uniform mixed system, and then the mixed system was placed in- In a freeze dryer at 30°C, freeze-dry for 72 hours to obtain chitosan / graphene oxide powder.

[0059] The obtained chitosan / graphene oxide powder was placed in a tube furnace for thermal reduction reaction under a nitrogen atmosphere. The thermal reduction reaction temperatures were controlled at 250°C, 500°C and 750°C, respectively, and the thermal reduction reaction time was controlled at 4h. ...

Embodiment 4～6

[0069] Be 1g:1mL:200mL ratio by weighing chitosan, glacial acetic acid and deionized water and be mixed with chitosan acetic acid aqueous solution; Be 1g:200mL ratio by weighing graphene oxide and deionized water Water, ultrasonically disperse graphene oxide in deionized water to prepare graphene oxide aqueous dispersion for later use.

[0070] According to the dropping speed of 2mL / min, the chitosan acetic acid aqueous solution was slowly added dropwise into the graphene oxide aqueous dispersion, and stirred for 10 hours at 60°C to form a uniform mixed system, and then the mixed system was placed in- In a freeze dryer at 30°C, freeze-dry for 72 hours to obtain chitosan / graphene oxide powder.

[0071] The obtained chitosan / graphene oxide powder was placed in a tube furnace for thermal reduction reaction under a nitrogen atmosphere, the thermal reduction reaction temperature was controlled at 750 °C, and the thermal reduction reaction time was controlled at 2h, 4h and 6h, respe...

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Abstract

The invention provides a nitrogen-doped reduced graphene oxide nano composite material and a preparation method and application thereof, and belongs to the technical field of graphene preparation. Thepreparation method provided by the invention comprises the following steps: mixing chitosan, glacial acetic acid and water to obtain a chitosan acetic acid aqueous solution; mixing graphene oxide with water to obtain a graphene oxide aqueous dispersion; mixing the chitosan acetic acid aqueous solution with the graphene oxide aqueous dispersion, and carrying out freeze drying to obtain chitosan / graphene oxide powder; and carrying out a thermal reduction reaction on the chitosan / graphene oxide powder to obtain the nitrogen-doped reduced graphene oxide nano composite material. The nitrogen-dopedreduced graphene oxide nano composite material is directly prepared through one-step thermal reduction reaction, so that the removal efficiency of the nitrogen-doped reduced graphene oxide nano composite material on phenol-containing pollutants is effectively improved, and meanwhile, convenient conditions are provided for subsequent treatment.

Description

technical field [0001] The invention belongs to the technical field of graphene preparation, and in particular relates to a nitrogen-doped reduced graphene oxide nanocomposite material and a preparation method and application thereof. Background technique [0002] Graphene has excellent physical and chemical properties such as large specific surface area, large capacity, and high electrical conductivity, and is widely used in new materials such as mobile phones, liquid crystal displays, batteries, and electronic components. Graphene oxide (Graphene Oxide, GO) is KMnO 4 and KClO 4 Graphene obtained after strong oxidation treatment is the precursor of all functionalized graphene materials. Graphene oxide contains many oxygen-containing functional groups on its layers, such as hydroxyl (-OH), carboxyl (-COOH), carbonyl (-C=O-) and epoxy etc., because these oxygen-containing functional groups will form hydrogen bonds with water molecules in aqueous solution, causing GO to ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/34
CPCB01J20/0259B01J20/20B01J2220/4806B01J2220/4825C02F1/283C02F2101/345
Inventor 吴涛赵芮光孙德军李公让蓝强
Owner SHANDONG UNIV
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