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Preparation method of carbon-based magnetic temperature-sensitive surface imprinted adsorbent

A surface imprinting and temperature-sensitive technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as complex components, achieve high adsorption capacity, reduce non-specific adsorption, and facilitate particle size effects

Inactive Publication Date: 2013-11-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the composition of environmental water is complex, and it is particularly important to selectively identify and separate target pollutants (2,4,5-trichlorophenol)

Method used

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  • Preparation method of carbon-based magnetic temperature-sensitive surface imprinted adsorbent
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  • Preparation method of carbon-based magnetic temperature-sensitive surface imprinted adsorbent

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Embodiment 1

[0028] 1. A method for preparing a carbon-based magnetic temperature-sensitive surface imprinted adsorbent, characterized in that it is carried out according to the following steps:

[0029] (1) Ferric oxide (Fe 3 o 4 ) synthesis method

[0030] 4g hexahydrate and ferric chloride (FeCl 3 ·6H 2 O) and 5g of sodium acetate (NaAc) were dissolved in 40ml of ethylene glycol, and the mixture was stirred at 130°C for 1h under nitrogen protection, then transferred to a 100ml reactor, reacted at 150°C for 8h, cooled to room temperature, black The magnetic Fe3O4 was washed several times with absolute ethanol and dried at 50°C for 4h.

[0031] (2) Magnetic carbon sphere composites (Fe 3 o 4 C) Preparation

[0032] Fe 3 o 4 Microspheres 0.1g, glucose 4g, PEG ( M W =1500) 0.3g, dissolved in 10ml of distilled water, ultrasonic 10min, the mixture was stirred for 30 minutes, then put into the reaction kettle, heated to 150°C, the temperature was raised for 3h, kept for 6h, coo...

Embodiment 2

[0049] 1. A method for preparing a carbon-based magnetic temperature-sensitive surface imprinted adsorbent, characterized in that it is carried out according to the following steps:

[0050] (1) Synthesis method of ferric oxide (Fe3O4)

[0051] 9g of hexahydrate and ferric chloride (FeCl3 6H2O) and 10g of sodium acetate (NaAc) were dissolved in 70ml of ethylene glycol, and the mixture was stirred at 180°C for 3h under the protection of nitrogen, then transferred to a 100ml reaction kettle, and heated at 200°C The reaction was carried out for 12 hours, cooled to room temperature, the black magnetic ferric iron tetroxide was washed several times with absolute ethanol, and dried at 60°C for 8 hours.

[0052] (2) Preparation of magnetic carbon sphere composite (Fe3O4C)

[0053] Fe3O4 microspheres 0.3g, glucose 7g, PEG (MW=1500) 0.6g, dissolved in 25ml distilled water, ultrasonicated for 20min, the mixture was stirred for 30min, then put into the reaction kettle, heated to 200°C, ...

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Abstract

The invention relates to a preparation method of a carbon-based magnetic temperature-sensitive surface imprinted adsorbent, belonging to the technical field of preparation of an environmental functional material. The preparation method comprises the following steps: preparing a ferroferric oxide / carbon (Fe3O4 / C) magnetic composite material through a simple effective hydrothermal synthesis method; performing vinyl modification on the magnetic composite material; and preparing the magnetic carbon composite material surface temperature-sensitive imprinted adsorbent through a free-radical polymerization process, and using the adsorbent for selective recognition and separation of 2,4,5-trichlorophenol in a water solution. Due to the addition of a temperature-sensitive monomer, the material can realize controllable release under the acid-free conditions. The coating of the carbon layer ensures that the prepared imprinted adsorbent has remarkable magnetic stability under acidic conditions, and effectively prevents the aggregation phenomenon of ferric oxide. The material has high adsorption capacity, and obvious 2,4,5-trichlorophenol molecule recognition performance, magnetic separation and temperature-sensitive property.

Description

technical field [0001] The invention relates to a preparation method of a carbon-based magnetic temperature-sensitive surface imprinted adsorbent, which belongs to the technical field of preparation of environmental functional materials. [0002] Background technique [0003] Molecular imprinting is a method of preparing polymers containing one or more specific molecular binding sites, and the prepared molecularly imprinted polymers (MIPs) can produce specific adsorption on template molecules. Surface molecular imprinting technology, by establishing molecular recognition sites on the surface of the matrix material, can better solve some serious defects in the traditional molecular imprinting technology as a whole, such as too deep embedding of active sites, and the dynamics of mass transfer and charge transfer. The chemical rate is slow, and the kinetic performance of adsorption-desorption is not good. Commonly used matrix materials are SiO 2 and ore soil, etc., where SiO...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
Inventor 潘建明李林子戴江栋朱文静瞿琴杭辉
Owner JIANGSU UNIV
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