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Preparation method and application of adsorbent

A kind of adsorbent and related technology, applied in the field of adsorbent preparation, can solve the problems of not achieving the ideal effect, less methylene blue adsorption, poor water solubility, etc., and achieve the effect of large specific surface area, fast and effective treatment, and good water solubility

Inactive Publication Date: 2015-02-18
ANHUI NORMAL UNIV
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Problems solved by technology

[0006] The existing adsorbents prepared by polymerization of cyclodextrins have less adsorption capacity for methylene blue and poor water solubility, which cannot achieve the desired effect

Method used

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  • Preparation method and application of adsorbent
  • Preparation method and application of adsorbent

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Embodiment 1

[0034] A preparation method of adsorbent, comprising the following steps:

[0035] (1) The end of the cyclodextrin is connected to the amino group

[0036] a. Suspend 10g β-CD in 240mL deionized water under magnetic stirring, then slowly add 40mL 2.5M NaOH solution dropwise, the suspension becomes clear, then add 2.6g dissolved in 10mL acetonitrile dropwise under ice bath conditions P-toluenesulfonyl chloride (p-TsCl), stirred vigorously at room temperature for 3 hours, a white precipitate (unreacted p-TsCl) was produced, filtered to remove the precipitate, and dilute hydrochloric acid (or ammonium chloride) was added to the filtrate until the pH was 8. The obtained solution was cooled to 4°C overnight, and the precipitate was obtained by vacuum filtration, washed three times with acetone, and finally, the crude product was recrystallized three times in hot deionized water to remove unreacted p-TsCl and β-CD , 50 ° C vacuum drying to obtain TsO-β-CD.

[0037] b. Dissolve 5g ...

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Abstract

The invention provides a preparation method and application of an adsorbent. The preparation method comprises the following steps: grafting amido to the tail end of cyclodextrin, and then adding the cyclodextrin and polyacrylic acid to a graphene oxide dispersion liquid for reaction; preparing a surface grafting graphene oxide nanocomposite material through a one-step method, wherein the surface grafting graphene oxide nanocomposite material can fast and effectively treat dye wastewater and especially absorb methylene blue. The adsorbent prepared through the method provided by the invention has the advantages of property of forming clathration with a dye molecule by sufficiently utilizing a cyclodextrin molecule, large specific area of a nanometer material and a high-molecular material, abundance of oxygen-containing functional groups, good water solubility of the high-molecular material, abundance of hydroxy and carboxyl and the like and is capable of fast and effectively treating the dye wastewater by generating electrostatic attraction effect with a cationic dye by concentrating functional group carboxyl on the surfaces of the nanometer material and the high-molecular material; and the adsorbent prepared through the method provided by the invention is capable of fast and effectively treating the dye wastewater because the functional groups, namely the hydroxy, the carboxyl and the like, easily form hydrogen bonds with a water molecule.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a preparation method and application of an adsorbent. Background technique [0002] With the development of science and technology, the problem of water pollution has become more and more serious, among which dye pollution has become one of the most important sources of water pollution. Many industries, such as textiles, paper and plastics, discharge large amounts of dye wastewater during production. These pollutants have the characteristics of high biological oxygen demand (BOD), high chemical oxygen demand (COD), high toxicity, etc., and most dyes have complex aromatic structures, which make their properties stable and difficult to degrade. Therefore, how to effectively treat dye wastewater is a very important and urgent problem to be solved, and these dye wastewater must be treated before discharge. [0003] Dye wastewater is usually treated using physical or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C08B37/16C02F103/30
CPCB01J20/264C02F1/288C02F2101/308C08B37/0012
Inventor 刘金水刘国宁石小凤
Owner ANHUI NORMAL UNIV
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