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A preparation method of functionalized β-cyclodextrin modified graphene oxide composite material

A technology of β-cyclodextrin and composite materials, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as unstable chemical properties, long adsorption time, difficult separation, etc., to achieve Broaden the application direction, increase the adsorption performance, and enhance the effect of dispersion

Active Publication Date: 2018-05-22
成都恒固新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical application, cyclodextrin still faces some problems, such as: (1) unstable chemical properties, easy to dissolve and lose; (2) long adsorption time, time-consuming; (3) to metal ions and organic pollutants (4) Difficult to separate; (5) Poor mechanical properties

Method used

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  • A preparation method of functionalized β-cyclodextrin modified graphene oxide composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a method for preparing a functionalized β-cyclodextrin-modified graphene oxide composite material, which is specifically completed through the following process.

[0024] (1) Preparation of functionalized β-CD

[0025] Add 5g of pre-dried β-cyclodextrin to the round bottom flask, then add solvent 40mL DMF (N,N-dimethylformamide) to dissolve the cyclodextrin and carry out nitrogen protection, then add 5.9 mL of GPTMS (the molar ratio of β-CD to GPTMS is 1:6). Subsequently, 0.1 g of sodium hydroxide was added to the cyclodextrin-dissolved solvent, and the mixture was continuously stirred for 48 hours under nitrogen protection at 55°C. Cool the reacted solution to room temperature and add acetone to it to precipitate the product, wash the obtained product with a large amount of acetone, and then dry it in a vacuum oven at 40°C to obtain a yellowish white water-soluble powder, which is the modified cyclopaste Essence is β-CD / GPTMS.

[0026] (2) P...

Embodiment 2

[0030] The β-CD / GPTMS / GO compound that embodiment 1 prepares is applied to the treatment of hexavalent chromium ion wastewater, comprises the following steps: get three hexavalent chromium solutions that initial concentration is respectively 10,20 and 40mg / L, adjust The pH value of the solution was 3.0, and the β-CD / GPTMS / GO complex prepared in Example 1 was added. The dosage of the complex was 0.17 g / L, and the oscillating adsorption reaction was carried out in an air bath constant temperature oscillator at 30 ° C. The rotation speed was 180rpm, the content of unadsorbed hexavalent chromium in the wastewater was measured by ultraviolet spectrophotometry, and the calculated adsorption results are shown in Table 1.

[0031] Table 1 Adsorption data of chromium by β-CD / GPTMS / GO composites under different initial concentrations of chromium

[0032] Initial concentration (mg / L)

[0033] As can be seen from Table 1, the adsorption capacity of the complex to hexavalent chro...

Embodiment 3

[0035] The β-CD / GPTMS / GO composite prepared in Example 1 is applied to the treatment of hexavalent chromium ion wastewater, comprising the following steps: getting a hexavalent chromium solution with an initial concentration of 10 mg / L, adjusting the pH value of the solution to 3.0, Add the β-CD / GPTMS / GO complex prepared in Example 1, the amount of the complex is 0.17g / L, and the adsorption reaction is carried out in an air bath constant temperature oscillator at 10, 30 and 50°C, and the rotation speed is 180rpm. The content of unadsorbed hexavalent chromium in the wastewater was determined by ultraviolet spectrophotometry, and the calculated adsorption results are shown in Table 2.

[0036] Table 2 The adsorption data of chromium on the composite of β-cyclodextrin and magnetic graphene oxide under different temperature conditions

[0037] Reaction temperature (°C)

[0038] It can be seen from Table 2 that the adsorption capacity of the complex to chromium ions is 35...

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Abstract

The invention discloses a preparation method of a functional beta-cyclodextrin modified graphene oxide composite material. The preparation method comprises the following steps of dissolving pre-dried beta-cyclodextrin by using DMF (Dimethyl Formamide), and sequentially adding GPTMS (Gamma-Glycidoxypropyltrimethoxysilane) and sodium hydroxide for reaction under the protection of nitrogen, thus obtaining modified cyclodextrin; dissolving the modified cyclodextrin by using deionized water, thus obtaining a hydrolysate; adding graphene oxide for carrying out an ultrasonic reaction, thus obtaining a cyclodextrin modified graphene oxide supermolecular hybrid material. The preparation method disclosed by the invention has the advantages that the cost is low, the technology is simple, the adsorption performance is high, separation is easy, environment friendliness is realized, and the like.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to a preparation method of a functionalized β-cyclodextrin modified graphene oxide composite material. Background technique [0002] Cyclodextrin, whose molecule is shaped like a cylinder, contains a large number of hydroxyl groups on the outside, and a hydrophobic cavity inside, which can combine with many inorganic and organic molecules to form host-guest inclusion complexes, and can change the physical and chemical properties of the inclusion complexes. It has the characteristics of protecting and stabilizing guest molecules and selectively orienting molecules; in addition, cyclodextrin has the advantages of wide sources, low price, easy degradation, and no pollution. Therefore, it has an important role in environmental protection and other fields as an adsorption material. research and application value. However, in practical application, cyclodextrin s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/20B01J20/22B01J20/24B01J2220/46B01J2220/4806B01J2220/4812B01J2220/4825C02F1/283C02F1/285C02F1/286C02F1/288C02F2101/20C02F2101/22
Inventor 何毅吕亮余宗学第海辉曾广勇潘阳詹迎青
Owner 成都恒固新材料科技有限公司
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