Preparation method for novel nano magnetic cyclodextrin/graphene biological adsorption material

A nano-magnetic and biological adsorption technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of long adsorption time, poor mechanical properties, difficult separation, etc., to improve the adsorption speed and adsorption. Quantity, enhance mechanical properties, prevent the effect of local agglomeration

Inactive Publication Date: 2012-10-10
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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  • Preparation method for novel nano magnetic cyclodextrin/graphene biological adsorption material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Example 1: Preparation of magnetic cyclodextrin / graphene adsorption material

[0019] A. Preparation of functionalized graphene

[0020] Weigh 1.0g of graphite powder and add it to 150mL of mixed acid (volume ratio of concentrated nitric acid to concentrated sulfuric acid: 1:6) (in an ice-water bath, add nitric acid first and then sulfuric acid under stirring), stir and react for 20 minutes, then add 5.0g permanganate Potassium, oil bath 85 ° C, heated to reflux, and reacted for 13 hours. Under ice-bath conditions, slowly add hydrogen peroxide dropwise until no more reaction occurs, centrifuge, wash with dilute hydrochloric acid and ethanol in sequence, and dry to obtain functionalized graphene.

[0021] B. Preparation of Magnetic Cyclodextrin / Graphene Adsorbent Material

[0022] 1.5 g of cyclodextrin, 0.5 g of magnetic particles, and 5 mL of glutaraldehyde were added to 30 mL of 10% ammonia water, and stirred at room temperature for 1 h. Take 10 mL of 0.2 mg / mL grap...

example 2

[0023] Example 2: Preparation of magnetic cyclodextrin / graphene adsorption material

[0024] A. Preparation of functionalized graphene

[0025] Weigh 1.0g of graphite powder and add it to 150mL of mixed acid (volume ratio of concentrated nitric acid to concentrated sulfuric acid: 1:5) (in an ice-water bath, add nitric acid first and then sulfuric acid under stirring), stir for 30 minutes, then add 6.0g of permanganic acid Potassium, oil bath at 90°C, heated to reflux, reacted for 15h. Under ice-bath conditions, slowly add hydrogen peroxide dropwise until no more reaction occurs, centrifuge, wash with dilute hydrochloric acid and ethanol in sequence, and dry to obtain functionalized graphene.

[0026] B. Preparation of Magnetic Cyclodextrin / Graphene Adsorbent Material

[0027] 2.0 g of cyclodextrin, 0.5 g of magnetic particles, and 6 mL of glutaraldehyde were added to 30 mL of 15% ammonia water, and the reaction was stirred at room temperature for 1.5 h. Take 10mL of 0.3mg / m...

example 3

[0028] Example 3: Preparation of magnetic cyclodextrin / graphene adsorption material

[0029] A. Preparation of functionalized graphene

[0030] Weigh 1.0g of graphite powder and add it to 150mL of mixed acid (volume ratio of concentrated nitric acid to concentrated sulfuric acid: 1:3) (in an ice-water bath, add nitric acid first and then sulfuric acid under stirring), stir and react for 50 minutes, then add 7.0g permanganate Potassium, oil bath 100 ° C, heated to reflux, and reacted for 16 hours. Under ice-bath conditions, slowly add hydrogen peroxide dropwise until no more reaction occurs, centrifuge, wash with dilute hydrochloric acid and ethanol in sequence, and dry to obtain functionalized graphene.

[0031] B. Preparation of Magnetic Cyclodextrin / Graphene Adsorbent Material

[0032] 2.5 g of cyclodextrin, 0.5 g of magnetic particles, and 10 mL of glutaraldehyde were added to 30 mL of 20% ammonia water, and stirred at room temperature for 2 h. Take 10mL of 0.5mg / mL grap...

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Abstract

The invention discloses a preparation method for a novel nano magnetic cyclodextrin / graphene biological adsorption material and particularly relates to modifying the surface of graphene with magnetic cyclodextrin through a surface modification technology. The novel method is characterized in that a nano magnetic particle is adopted as a carrier; coating modification is conduced on the nano magnetic particle to obtain the magnetic cyclodextrin with a core-shell structure; and then the functional graphene is modified with the magnetic cyclodextrin to prepare the novel magnetic nano biological adsorption material with super-strong adsorbability, easiness in separation and zero contamination. Through the adoption of the preparation method, the defect of high possibility of agglomeration of the graphene is overcome, the specific surface area of the adsorption material is greatly enlarged, the enveloping sites of cyclodextrin molecules are increased, and the range of adsorption objects is expanded. The adsorption material prepared by the invention has the advantages of strong controllability of a surface structure, reliable mechanical stability, strong recognition capability, high adsorptive capacity, easiness in desorption, reusability and the like; and simple and feasible ways and means are provided for treatment of environmental pollutants and recycling of waste.

Description

technical field [0001] The invention belongs to a preparation method of a novel biological adsorption material, in particular to a simple and convenient method for preparing magnetic cyclodextrin / graphene as an adsorption material for wastewater treatment. 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 pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/26C02F1/28
Inventor 罗川南范露露孙敏
Owner UNIV OF JINAN
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