Preparation method for surface molecular imprinting nano-composite material of magnetic graphene

A nanocomposite material, surface molecular imprinting technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of cumbersome process, time-consuming and other problems, and achieve environmental friendliness and simple operation. Time-consuming, fast mass transfer results

Inactive Publication Date: 2015-12-16
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] When preparing surface molecularly imprinted composite materials, the surface molecularly imprinted polymer needs to be separated from the solution in the washing and elution steps. The separation method usually used is centrifugation, which is cumbersome and time-consuming

Method used

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  • Preparation method for surface molecular imprinting nano-composite material of magnetic graphene

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Embodiment 1

[0017] 500mg of graphene oxide was dispersed in 250ml of deionized water and ultrasonicated for 1h. 0.01molFeCl 3 ·6H 2 O and 0.075mol FeCl 2 4H 2 O was dissolved in 25ml deionized water, and then the above solution was dropped into the GO aqueous solution drop by drop, and N 2 , stirred for 1h. Add 28% ammonia water dropwise to adjust the pH of the solution to 9.5. Add 5ml of hydrazine hydrate at 60°C and stir for 4 hours. After the solution was cooled to room temperature, it was suction filtered and washed with deionized water to obtain magnetic graphene. Take 50mg of magnetic graphene, add 200mg of p-nitrophenol, and 50ml of deionized water. Then, 10 mg of phenyltriethoxysilane and 10 mg of tetraethoxysiloxane were added to the above system, and then 28% ammonia water was added to adjust the pH to 9.5, and the mixture was shaken in a water bath for 8 hours at a frequency of 80 Hz. After the reaction, the product was washed with deionized water. Shake the product wit...

Embodiment 2

[0019] 800mg of graphene oxide was dispersed in 250ml of deionized water and ultrasonicated for 2h. 0.03molFeCl 3 ·6H 2 O and 0.01mol FeCl 2 4H 2 O was dissolved in 25ml deionized water, and then the above solution was dropped into the GO aqueous solution drop by drop, and N 2 , stirred for 2h. 28% ammonia water was added dropwise to adjust the pH of the solution to 10. 10 ml of sodium borohydride was added at 80° C., and the reaction was stirred for 7 h. After the solution was cooled to room temperature, it was suction filtered and washed with deionized water to obtain magnetic graphene. Take 50mg of magnetic graphene, add 50mg of 2,4-dichlorophenol, and 50ml of deionized water. Then, 20 mg of phenyltriethoxysilane and 10 mg of tetramethoxysiloxane were added to the above system, and then 28% ammonia water was added to adjust the pH to 11, and the mixture was shaken in a water bath for 10 h at a frequency of 120 Hz. After the reaction, the product was washed with deion...

Embodiment 3

[0021] 1250mg of graphene oxide was dispersed in 250ml of deionized water and ultrasonicated for 4h. 0.06molFeCl 3 ·6H 2 O and 0.02mol FeCl 2 4H 2 O was dissolved in 25ml deionized water, and then the above solution was dropped into the GO aqueous solution drop by drop, and N 2 , stirred for 0.5h. Add 28% ammonia water dropwise to adjust the pH of the solution to 11. Add 15 ml of hydrazine hydrate at 100° C., and stir for 10 h. After the solution was cooled to room temperature, it was suction filtered and washed with deionized water to obtain magnetic graphene. Take 50m magnetic graphene, add 20mg 2-picoline, 50ml deionized water. Then, 50 mg of 3-aminopropyltrimethoxysilane and 10 mg of tetramethoxysiloxane were added to the above system, and then 28% ammonia water was added to adjust the pH to 12, and the mixture was shaken in a water bath for 15 hours at a frequency of 180 Hz. After the reaction, the product was washed with deionized water. Shake the product with el...

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Abstract

The invention provides a preparation method for a surface molecular imprinting nano-composite material of magnetic graphene and belongs to the technical field of preparation of environmental protection functional materials. The method comprises the following steps: modifying a layer of Fe3O4 nano-particles on the surface of graphene; by using the obtained magnetic graphene as a carrier and using siloxane as a functional monomer and a cross-linking agent, preparing the surface molecular imprinting nano-composite material of the magnetic graphene in a water solution at normal temperature through a sol-gel method. The surface molecular imprinting nano-composite material of the magnetic graphene is applied to harmful substances or substances to be detected in a selective magnetic separation water body, so that target molecules can be quickly enriched and separated. The preparation method for the surface molecular imprinting nano-composite material of the magnetic graphene, provided by the invention, is simple, the carrier, template molecules, the functional monomer and a solvent are mixed in proportion, the cost is low, and energy conservation and environmental protection are achieved. A product has the advantages of specificity selection, high adsorption capacity, convenient magnetic separation, high speed and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of environmentally friendly functional materials, in particular to a method for preparing a molecularly imprinted nanocomposite material on the surface of magnetic graphene. Background technique [0002] At present, activated carbon, composite metal oxides, and polymers containing special functional groups can be used to adsorb harmful substances in water bodies. However, none of the above methods can specifically adsorb and separate a single harmful substance. Molecular imprinting technology, as a new technology for preparing polymers with molecular recognition functions, has become an attractive option because of its advantages in the specific selective separation of harmful substances in water. A new technology for water pollution treatment with good application prospects. However, the traditional preparation methods of molecularly imprinted polymers have long preparation time, cumbersome ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 罗静高雅涵宋研君谭侃施维东刘晓亚
Owner JIANGNAN UNIV
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