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A kind of preparation method of nanocomposite adsorption material

An adsorption material and nanocomposite technology, applied in the field of nanomaterials, can solve the problems of secondary micro-pollution, easy agglomeration of graphene oxide, etc., and achieve the effects of easily controllable conditions, large adsorption capacity, and high filtration efficiency.

Inactive Publication Date: 2019-05-10
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to aim at the defects and deficiencies of the prior art, to provide a kind of simple in structure, reasonable in design, the preparation method of the convenient nano-composite adsorption material, utilize agar as carrier, prepare activated carbon, graphene oxide, agar gas Sol, not only give full play to the high-efficiency adsorption performance of activated carbon and graphene oxide, but also avoid the easy agglomeration of graphene oxide, and the small-sized graphene oxide is difficult to remove from the water body, solving the problem of secondary micro-pollution to the water environment

Method used

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  • A kind of preparation method of nanocomposite adsorption material
  • A kind of preparation method of nanocomposite adsorption material
  • A kind of preparation method of nanocomposite adsorption material

Examples

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Embodiment 1

[0022] Embodiment 1: the preparation of graphene oxide

[0023] Add 50mL of concentrated sulfuric acid into a 500mL beaker, slowly add 10g of potassium permanganate and 2g of sodium nitrate in an ice bath, and stir thoroughly. After the potassium permanganate and sodium nitrate are completely dissolved, slowly add 2g of expanded graphite, After the expanded graphite is completely stirred evenly, it is sealed and stored in a refrigerator at 273K for 24 hours. The beaker was heated to 308K in an oil bath, and kept stirring for 30 minutes. Start to slowly add deionized water dropwise, this process is a key step in the preparation of graphene oxide, the slower the dropwise addition of deionized water is, the more beneficial it is for the synthesis. While adding deionized water dropwise, keep stirring, when the temperature rises to 371K, just drop the 500mL beaker full of deionized water. Insulate and stir at 371K for 15 minutes, then add a few milliliters of hydrogen peroxide dr...

Embodiment 2

[0024] Embodiment 2: the preparation of coconut shell activated carbon

[0025] Put the coconut shell into a muffle furnace for 673K ​​carbonization for 2 hours, use a QM all-round planetary ball mill to crush the carbonized coconut shell, and mix 5 grams of crushed coconut shell charcoal with potassium hydroxide in a weight ratio of 1:2 into the Soak in 200mL of deionized water for 24 hours, and put the sample into an oven to dry at 273K. Put the dried coconut shell charcoal and potassium hydroxide mixture into a tube furnace, heat and keep warm at 1173K for 1 hour under the protection of nitrogen to prepare activated carbon, rinse it repeatedly with deionized water after cooling, and when the pH of the solution reaches neutral, put The activated carbon was dried in an oven at 273K for later use.

Embodiment 3

[0026] Example 3: Preparation of activated carbon / graphene oxide solutions with different activated carbon contents. Activated carbon and graphene oxide solution are mixed in a certain proportion, and the content of activated carbon in the activated carbon / graphene oxide dry sample is 1%, 2%, and 4% respectively , 6% and 8%, the activated carbon and graphene oxide solution were stirred on a magnetic stirrer for 5 hours until the activated carbon and graphene oxide were mixed uniformly.

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Abstract

The invention discloses a preparation method of a nanocomposite adsorption material. The specific steps are: adding a certain amount of concentrated sulfuric acid into a 500mL beaker, slowly adding potassium permanganate and sodium nitrate in an ice bath, and fully stirring to dissolve Finally, add expanded graphite and stir evenly, put it in the refrigerator and store it at 273K for 24 hours; heat the beaker to 308K in an oil bath, keep it warm and stir for 30 minutes, slowly add deionized water dropwise, at the same time, keep stirring and keep the temperature Rising to 371K, insulated and stirred at 371K for 15 minutes; the present invention uses agar as a carrier to prepare activated carbon / graphene oxide / agar aerosol, which not only gives full play to the efficient adsorption performance of activated carbon and graphene oxide, but also avoids the easy absorption of graphene oxide. Agglomerated, micro-sized graphene oxide is difficult to remove from the water body, solving the problem of secondary micro-pollution to the water environment.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a preparation method of a nanocomposite adsorption material. Background technique [0002] In recent years, with the acceleration of my country's industrialization process, the improper discharge of a large amount of dye-containing industrial wastewater has led to increasingly serious water pollution in my country, and the deteriorating water environment is increasingly threatening people's health. The adsorption method is considered to be a very effective water purification treatment process due to its advantages of low cost, easy operation, and not easy to produce secondary pollution. However, the shortcomings of traditional adsorbents such as small adsorption capacity and low adsorption efficiency limit their practical application. Therefore, people have been looking for new adsorption materials with larger adsorption capacity and more effective. [0003] Graphen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/58C02F101/30
CPCB01J20/20B01J20/24B01J2220/4806B01J2220/4825C02F1/28C02F1/283C02F1/286C02F2101/308
Inventor 李延辉杜秋菊陈龙张昭李佳彬乔斌王德昌王翠苹
Owner QINGDAO UNIV
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