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Preparation method of magnetic Fe3O4 loaded dendrimer adsorbent

A dendrimer and adsorbent technology, applied in the field of preparation of magnetic Fe3O4-loaded dendrimer adsorbent, can solve the problems of uneven distribution of functional groups, low loading rate, adverse effects of adsorption, etc., and achieve good adsorption selectivity , the effect of high content of functional groups

Inactive Publication Date: 2020-05-15
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The "Graft onto" method has advantages in controlling the regularity of the dendrimer structure, but due to the steric hindrance effect, the loading rate of the high-algebra dendrimers on the basic surface is low and the distribution of functional groups is uneven. to adversely affect

Method used

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  • Preparation method of magnetic Fe3O4 loaded dendrimer adsorbent
  • Preparation method of magnetic Fe3O4 loaded dendrimer adsorbent
  • Preparation method of magnetic Fe3O4 loaded dendrimer adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Under nitrogen protection, 5 g of Fe 3 o 4 @SiO 2 and 10 g of the 2.0th generation triethoxysilyl-based PAMAM dendrimer were added to a three-necked flask, and 100 ml of toluene was added as a solvent. The reaction mixture was ultrasonically dispersed and reacted for 18 hours at 80 ° C. After the reaction was completed, it was cooled to At room temperature, the product was separated by a magnet, and washed three times by adding 100 ml of absolute ethanol to a three-necked flask. Then add 100 milliliters of absolute ethanol and 11 grams of salicylaldehyde, heat and reflux to continue the reaction for 16 hours after ultrasonic dispersion is uniform, cool to room temperature after the reaction, separate the product by a magnet, reflux extraction with absolute ethanol for 12 hours, and dry to obtain Fe 3 o 4 @SiO 2 -G2.0-S.

Embodiment 2

[0020] Under nitrogen protection, 5 g of Fe 3 o 4 @SiO 2 and 15 g of the 2.0th generation triethoxysilyl-based PAMAM dendrimer were added to a three-necked flask, and 150 ml of toluene was added as a solvent. The reaction mixture was ultrasonically dispersed and reacted for 24 hours at 75 ° C. After the reaction was completed, it was cooled to At room temperature, the product was separated by a magnet, and washed three times by adding 100 ml of absolute ethanol to a three-necked flask. Then add 150 milliliters of absolute ethanol and 16 grams of salicylaldehyde, heat and reflux to continue the reaction for 20 hours after ultrasonic dispersion, and cool to room temperature after the end of the reaction. The product is separated by a magnet, extracted with absolute ethanol for 12 hours, and dried to obtain Fe 3 o 4 @SiO 2 -G2.0-S.

Embodiment 3

[0022] Under nitrogen protection, 5 g of Fe 3 o 4 @SiO 2 and 22 g of the 2.0th generation triethoxysilyl-based PAMAM dendrimer were added to a three-necked flask, and 150 ml of toluene was added as a solvent. The reaction mixture was ultrasonically dispersed and reacted for 36 hours at 70 ° C. After the reaction, it was cooled to At room temperature, the product was separated by a magnet, and washed three times by adding 100 ml of absolute ethanol to a three-necked flask. Then add 150 milliliters of absolute ethanol and 23 grams of salicylaldehyde, heat and reflux to continue the reaction for 24 hours after ultrasonic dispersion, and cool to room temperature after the reaction, separate the product by a magnet, reflux extraction with absolute ethanol for 12 hours, and dry to obtain Fe 3 o 4 @SiO 2 -G2.0-S.

[0023] Performance Evaluation 1: Adsorption performance of the adsorbent prepared in Example 3 to metal ions

[0024] Add 20 ml of 0.001 mol / L Hg(II), Pb(II), Ni(II)...

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Abstract

The invention relates to a preparation method of a magnetic Fe3O4 loaded functionalized PAMAM dendrimer adsorbent. The preparation method comprises the steps: taking 3-aminopropyltriethoxysilane as acentral core, and firstly, preparing a 2.0-generation triethoxy silicon-based PAMAM dendrimer; then carrying out surface modification on silicon dioxide coated magnetic nano Fe3O4 by utilizing the 2.0-generation triethoxy silicon-based PAMAM dendrimer; and finally functionalizing amino at the tail end of the PAMAM dendrimer by salicylaldehyde to prepare the metal ion adsorbent. The adsorbent prepared by the method has magnetism, contains rich nitrogen and oxygen functional groups, is easy to recycle, has good adsorption performance and adsorption selectivity on Hg (II) in water, and can be used for selective adsorption separation and enrichment recovery of Hg (II).

Description

technical field [0001] The invention relates to a magnetic Fe 3 o 4 The invention relates to a preparation method of a loaded dendrimer adsorbent, which belongs to the technical field of composite materials. Background technique [0002] With the development of battery, electroplating, metallurgy, mining and other industries, the pollution of heavy metal ions to the environment, especially to the pollution of water bodies has attracted widespread attention. Heavy metal ions are toxic, non-degradable and easy to accumulate in organisms through the food chain, seriously endangering human health. Therefore, the removal of heavy metal ions in water is of great significance. [0003] The removal of heavy metal ions in water by adsorption method has the advantages of simplicity and high efficiency. In recent years, magnetic nano-Fe 3 o 4 Due to the advantages of simple preparation method, large specific surface area, and easy separation and recovery, it is used to prepare met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/06B01J20/262B01J20/103B01J20/28009C02F1/281C02F1/285B01J2220/4812B01J2220/4806B01J2220/46C02F2101/20
Inventor 牛余忠陈厚李子威薛众鑫
Owner LUDONG UNIVERSITY
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