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A carbon nanosheet loaded tio 2 Molecularly imprinted material and its preparation method and application

A technology of carbon nanosheets and molecular imprinting, which is applied in chemical instruments and methods, ion exchange, and other chemical processes, can solve the problem of low degradation effect of low-concentration pollutants in products, and does not involve strong coupling of selectivity-adsorption-photocatalysis and other problems, to achieve the effect of obvious adsorption-photocatalysis synergy, easy large-scale production, and simple process

Active Publication Date: 2021-08-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As mentioned above, the inventors of the present invention have successfully prepared highly efficient photocatalytic materials with adsorption-photocatalytic synergy, which can be found in Chinese patent document CN108654586A (patent application number: 201810427935.6), but currently in various documents published , all of which do not involve the strong coupling of selectivity-adsorption-photocatalysis, and the degradation effect of the product on low-concentration pollutants in actual complex water bodies is very low

Method used

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  • A carbon nanosheet loaded tio <sub>2</sub> Molecularly imprinted material and its preparation method and application
  • A carbon nanosheet loaded tio <sub>2</sub> Molecularly imprinted material and its preparation method and application
  • A carbon nanosheet loaded tio <sub>2</sub> Molecularly imprinted material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A carbon nanosheet supported TiO 2 A method for preparing a molecularly imprinted material, comprising the following steps:

[0058] (1) Dissolve F127 in water and absolute ethanol with a volume ratio of 1:1 at room temperature and constant stirring, and control its mass concentration to 0.06%. After the reagent is completely dissolved, add resorcinol in sequence , concentrated hydrochloric acid and formaldehyde solution, the control resorcinol and formaldehyde molar ratio is 1:2, the pH of solution is 1.5, obtains solution A; The mass ratio of F127 and hydroquinone is 1:1;

[0059] (2) Under the condition of room temperature and continuous stirring, put the titanium trichloride solution (containing 3wt% hydrochloric acid) with a concentration of 0.5mol / L in water, control its volume ratio to 1:1, stir for a period of time and then Add sodium nitrate and sodium sulfate, and control the volume ratios of their mass and titanium trichloride aqueous solution to 1:80g / mL an...

Embodiment 2

[0069] As described in Example 1, the difference is:

[0070] In step (6), the substance ratio of control template: functional monomer: crosslinking agent is 1:2:5. On this basis, the mass ratio of the matrix to the imprinted polymer (functional monomer + crosslinking agent) is controlled to be 1:2;

[0071]In step (7), the polymerization reaction was carried out in a water bath at 50° C. for 30 hours. Cool to room temperature, centrifuge, wash three times with ethanol and distilled water respectively, then add 300mL distilled water, place under 600W ultraviolet light for 1 hour to remove the template.

Embodiment 3

[0073] As described in Example 1, the difference is:

[0074] In step (6), the substance ratio of control template: functional monomer: crosslinking agent is 1:6:15. On this basis, the mass ratio of the matrix to the imprinted polymer (functional monomer + crosslinking agent) is controlled to be 1:8;

[0075] In step (7), the polymerization reaction was carried out in a water bath at 90° C. for 15 hours. Cool to room temperature, centrifuge, wash three times with ethanol and distilled water respectively, then add 300mL distilled water, place under 200W ultraviolet light for 5 hours to remove the template.

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Abstract

The invention relates to a carbon nanosheet loaded TiO 2 Molecularly imprinted material and its preparation method and application, the material is carbon nanosheet loaded TiO 2 As the substrate, antibiotics as the template, prepared by molecular imprinting technology. Material TiO 2 For anatase, graphitization of carbon nanosheets can not only enrich low-concentration antibiotics in solution but also accelerate the separation of photogenerated electrons and holes. Due to the abundant imprinted holes on the surface of the material, it can specifically recognize and adsorb ciprofloxacin and quickly mass transfer to the photocatalytic active species, so it shows strong synergy and selectivity between adsorption and photocatalysis. The adsorption and photocatalytic selectivity coefficients of stars are as high as 7.2 and 3.2, respectively. The preparation method of the invention has simple process and low cost, and the prepared molecularly imprinted photocatalytic material has broad application prospects for selectively degrading specific pollutants in the environment.

Description

technical field [0001] The invention relates to a carbon nanosheet loaded TiO 2 The molecularly imprinted material and its preparation method and application belong to the field of preparation of nanocomposite materials. Background technique [0002] In recent years, due to the mass production and unreasonable application of antibiotics and other drugs and personal care products, their pollution to the environment has become increasingly serious. TiO 2 As an environmentally friendly technology, photocatalysis can quickly and effectively degrade organic pollutants under mild conditions without secondary pollution. It has been widely used in antibiotic wastewater treatment research in recent years. The concentration of drugs such as antibiotics in the actual water environment is low, and the contact with the photocatalyst is limited, resulting in a slow degradation rate. The study found that by adding TiO 2 The composite photocatalytic material prepared by compounding with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D15/08B01J21/18B01J21/06
CPCB01J20/268B01J20/103B01J20/20B01D15/08B01J21/18B01J21/063B01J35/39B01J35/23B01J35/33
Inventor 徐世平郑旭阳张启亮李璐璐池英华岳钦艳高宝玉
Owner SHANDONG UNIV
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