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Preparation and application of fluorescent magnetic graphene oxide based 4-chlorophenol molecularly imprinted polymer

A technology of imprinting polymers and chlorophenol molecules, applied in the direction of magnetic properties of alkali metal compounds, alkali metal oxides/hydroxides, organic materials/organic magnetic materials, etc., can solve problems such as endangering water safety and achieve mass transfer rates Fast, simple operation, short diffusion distance effect

Active Publication Date: 2016-11-09
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the usual tap water chlorination treatment, the phenolic substances contained in the water body are easily chlorinated to form 4-chlorophenol, which endangers water safety.

Method used

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  • Preparation and application of fluorescent magnetic graphene oxide based 4-chlorophenol molecularly imprinted polymer
  • Preparation and application of fluorescent magnetic graphene oxide based 4-chlorophenol molecularly imprinted polymer
  • Preparation and application of fluorescent magnetic graphene oxide based 4-chlorophenol molecularly imprinted polymer

Examples

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Effect test

Embodiment 1

[0029] A preparation method of fluorescent magnetic graphene oxide-based 4-chlorophenol molecularly imprinted polymer, the specific steps of the preparation method are as follows:

[0030] 1) Preparation of graphene oxide:

[0031] Add 23mL of concentrated sulfuric acid with a mass concentration of 98% in the three-necked flask, put it in an ice bath and cool it below 4°C, add 1g of natural graphite flakes and 0.5g of sodium nitrate under mechanical stirring, and add 3g of high manganese after stirring for 1 hour Potassium acid, control the temperature of the reaction solution at 10-15°C, stir for 2 hours, raise the temperature of the reaction solution to 35°C, add 80mL of deionized water after 30 minutes of reaction, raise the temperature of the reaction solution to 95°C, and react for 30 minutes. After the color of the reaction solution turns golden yellow, add 60mL of deionized water to dilute the reaction solution to terminate the reaction, and then add a certain amount of...

Embodiment 2

[0039] A preparation method of fluorescent magnetic graphene oxide-based 4-chlorophenol molecularly imprinted polymer, the specific steps of the preparation method are as follows:

[0040] 1) Preparation of graphene oxide: Same as Example 1.

[0041] 2) Preparation of magnetic graphene oxide: same as Example 1.

[0042] 3) Synthesis of cadmium telluride quantum dots: same as in Example 1.

[0043] 4) Preparation of fluorescent magnetic graphene oxide-based 4-chlorophenol molecularly imprinted polymer:

[0044] Ultrasonic disperse 2.0 g of cadmium telluride quantum dots prepared in step 3) in a 0.05 mol / L polyethylene glycol (mPEG-SH) solution, react at room temperature for 24 hours, and then add 0.50 g of cadmium telluride quantum dots prepared in step 2) Magnetic graphene oxide and 100ml of ethanol, mechanically stirred for 30min, 5.0mmol of 3-aminopropyltriethoxysilane and 2.0mmol of 4-chlorophenol were dissolved in 80mL of ethanol solvent, and 5.0mL of orthosilicon Ethyl...

Embodiment 3

[0046] A preparation method of fluorescent magnetic graphene oxide-based 4-chlorophenol molecularly imprinted polymer, the specific steps of the preparation method are as follows:

[0047] 1) Preparation of graphene oxide: Same as Example 1.

[0048] 2) Preparation of magnetic graphene oxide: same as Example 1.

[0049] 3) Synthesis of cadmium telluride quantum dots: same as in Example 1.

[0050] 4) Preparation of fluorescent magnetic graphene oxide-based 4-chlorophenol molecularly imprinted polymer

[0051] Ultrasonic disperse 1.0 g of cadmium telluride quantum dots prepared in step 3) in a 0.05 mol / L polyethylene glycol (mPEG-SH) solution, react at room temperature for 16 hours, and then add 0.25 g of cadmium telluride prepared in step 2) Magnetic graphene oxide and 50ml of ethanol, mechanically stirred for 30min, 2.5mmol of 3-aminopropyltriethoxysilane and 1.0mmol of 4-chlorophenol were dissolved in 40mL of ethanol solvent, and 2.5mL of orthosilicon Add ethyl acetate to...

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Abstract

The invention discloses preparation and application of a fluorescent magnetic graphene oxide based 4-chlorophenol molecularly imprinted polymer and belongs to the technical field of functional materials. A preparation method includes: compositing graphene oxide with a magnetic material; modifying the surface of a composite with fluorescent quantum dots; adopting molecular imprinting technology to prepare the fluorescent magnetic graphene oxide based 4-chlorophenol molecularly imprinted polymer has specific recognition capability to 4-chlorophenol template molecules. The molecularly imprinted polymer is large in specific surface area and recognition site number, high in mass transfer rate and excellent in selective adsorption performance. The molecularly imprinted polymer can be quickly separated from complex matrixes under action of a magnetic field and can be applied to fluorescent detection specific to 4-chlorophenol; when serving as a solid phase extraction agent, the molecularly imprinted polymer can be used for specifically gathering and detecting trace 4-chlorophenol. The method is high in gathering multiple and low in detection limit, thereby having high extraction capability and efficiency.

Description

technical field [0001] The invention relates to the preparation and application of a fluorescent magnetic graphene oxide-based 4-chlorophenol molecularly imprinted polymer, which belongs to the technical field of functional materials. Background technique [0002] 4-Chlorophenol (4-CP) is the main component of biopesticides, wood preservatives, dyes, rust removers and other products, and it causes serious pollution to the environment in its application. The 4-chlorophenol left in the environment is directly harmful to humans and animals, not only causing digestive system, nervous system, and respiratory system disorders, but also carcinogenic. During the usual chlorination of tap water, the phenolic substances contained in the water are easily chlorinated to form 4-chlorophenol, which endangers water safety. Therefore, it is of great significance to establish a sensitive, accurate and rapid separation and detection method for 4-chlorophenol in environmental water. [0003]...

Claims

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Application Information

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IPC IPC(8): C08G77/26C08K9/02C08K3/04C08K3/30C08J9/26B01J20/26B01J20/28B01J20/30C02F1/28G01N21/64G01N30/02C09K11/88H01F1/42C02F101/36
CPCB01J20/268B01J20/28009C02F1/285C02F2101/36C08G77/26C08J9/26C08J2201/0424C08J2383/08C08K3/04C08K3/30C08K9/02C09K11/883G01N21/6428G01N30/02G01N2021/6432G01N2030/027H01F1/42
Inventor 韩爽姜海燕程卉袁欣王远
Owner QIQIHAR UNIVERSITY
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