Preparation method of new nanometer composite adsorption material

A nano-composite and adsorption material technology, applied in the field of nano-materials, can solve the problems of easy agglomeration of graphene oxide, secondary micro-pollution, etc., and achieve the effects of large adsorption capacity, easy control of conditions, and good desorption performance.

Inactive Publication Date: 2017-07-11
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, provide a kind of simple in structure, reasonable in design, the preparation method of the novel nanocomposite adsorption material of convenience, utilize agar as carrier, prepare activated carbon, graphene oxide, agar The aerosol not only gives full play to the high-efficiency adsorption performance of activated carbon and graphene oxide, but also avoids 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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  • Preparation method of new nanometer composite adsorption material
  • Preparation method of new nanometer composite adsorption material
  • Preparation method of new nanometer composite 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] Embodiment 3: the preparation of the activated carbon / graphene oxide solution of different activated carbon contents

[0027] Mix the activated carbon and graphene oxide solution in a certain proportion, the content of activated carbon in the activated carbon / graphene oxide dry sample is 1%, 2%, 4%, 6% and 8%, respectively, and the activated carbon and graphene oxide solution are placed in a magnetic Stir on a stirrer for 5 hours until the activated carbon and graphene oxide are mixed evenly.

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Abstract

The invention discloses a preparation method of a new nanometer composite adsorption material. The preparation method comprises the specific steps of, adding a certain amount of concentrated sulfuric acid in a beaker of 500 mL, in an ice-bath condition, slowly adding potassium permanganate and sodium nitrate, performing full stirring to dissolve potassium permanganate and sodium nitrate, adding expandable graphite while performing uniform stirring, and keeping the beaker in a refrigerator at 273 K for 24 h; and heating the beaker in an oil-bath pot to 308 K, maintaining the temperature while performing stirring for 30 min, slowly dropwise adding deionized water while performing stirring and raising the temperature to 371 K, and maintaining the temperature at 371 K while performing stirring for 15 min. According to the preparation method, agar is taken as a carrier to prepare active carbon/oxidized graphene/agar aerosol. Efficient adsorptive property of active carbon and oxidized graphene is fully developed, easy agglomeration of oxidized graphene is prevented, oxidized graphene with small size is hard to remove from a water body, and the problem of secondary micro-pollution to the water environment is solved.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a preparation method of a novel 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] G...

Claims

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Application Information

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Patent Type & Authority Applications(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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