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Preparation method and application of microwave-assisted synthesized chlorine-element-doped surface molecular imprinting photocatalyst

A surface molecular imprinting, photocatalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of deep embedding of active sites, poor selectivity of imprinted polymers, kinetic rate slow and so on

Inactive Publication Date: 2014-07-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surface Molecular Imprinting Technique (Surface Molecular Imprinting Technique) can better solve some serious defects of traditional molecular imprinting technology by establishing molecular recognition sites on the surface of matrix materials, such as: active sites are embedded too deeply, The kinetic rate of mass transfer and charge transfer is slow, the kinetic performance of adsorption-transfer-readsorption-retransfer cycle is poor; the removal of template molecules is not complete, the utilization of active sites inside the polymer network is low, and the imprinted polymer poor selectivity

Method used

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  • Preparation method and application of microwave-assisted synthesized chlorine-element-doped surface molecular imprinting photocatalyst
  • Preparation method and application of microwave-assisted synthesized chlorine-element-doped surface molecular imprinting photocatalyst
  • Preparation method and application of microwave-assisted synthesized chlorine-element-doped surface molecular imprinting photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Slowly add 10mL tetrabutyl titanate dropwise to 100mL absolute ethanol solution, stir at room temperature for 30min; add 100mL 1mol / L dilute hydrochloric acid dropwise to the above solution, stir for 6h, and age for 2h until Form a gel; dry the obtained gel in a vacuum drying oven at 70°C for 10 hours, take it out and put it into a muffle furnace for calcination at 500°C for 4 hours, and cool naturally to obtain a chlorine-doped titanium dioxide composite photocatalyst;

[0032] (2) Dissolve 1 mmol of tetracycline template molecules in 30 mL of acetonitrile, stir in a water bath at 25°C for 30 min, then add the functional monomer (4-vinylpyridine) into the above solution and stir for 1 h, then add a cross-linking agent (trimethylol propane acrylate) and initiator (azobisisobutyrocyanide) and stirred for 30min, wherein the ratio of template molecule: functional monomer: crosslinking agent: initiator is 1:2:6:0.3; take 1g Add the photocatalyst synthesized in (1) into ...

Embodiment 2

[0035] According to the steps in Example 1, the difference is that in (2), 1 mmol of tetracycline template molecules are completely dissolved in 30 mL of toluene, and the functional monomer (4-vinylpyridine) is added to the above solution after stirring in a water bath at 25 °C for 30 min. Stir for 1h, then add crosslinking agent (trimethylolpropane acrylate) and initiator (azobisisobutyrocyanide) and stir for 30min, wherein template molecule: functional monomer: crosslinking agent: initiator The ratio is 1:2:6:0.3; take 1g of the photocatalyst synthesized in (1) and add it to the solution and continue to stir for 30 minutes. Stir at 2000rpm, cool naturally, centrifuge the obtained solution to obtain a solid substance and place it in a vacuum oven at 60°C for 12 hours; the obtained solid powder is subjected to Soxhlet extraction to elute template molecules and then dried for later use;

[0036] (3) According to the steps in Example 1, the activity of photodegradation of tetrac...

Embodiment 3

[0038]According to the steps in Example 1, the difference is that in (2), 1 mmol of tetracycline template molecules are completely dissolved in 30 mL of methanol, and the functional monomer (4-vinylpyridine) is added to the above solution after stirring in a water bath at 25 °C for 30 min. Stir for 1h, then add crosslinking agent (trimethylolpropane acrylate) and initiator (azobisisobutyrocyanide) and stir for 30min, wherein template molecule: functional monomer: crosslinking agent: initiator The ratio is 1:2:6:0.3; take 1g of the photocatalyst synthesized in (1) and add it to the solution and continue to stir for 30 minutes, then inject the solution into a microwave reaction bottle and heat at 600W and 70°C for 60 minutes, and magnetically stir during the heating process The rotating speed is 2000rpm, and it is cooled naturally, and the obtained solution is centrifuged to obtain a solid substance, which is dried in a vacuum oven at 60°C for 12 hours; the obtained solid powder ...

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Abstract

The invention belongs to the technical field of environmental material preparation, and relates to a preparation method and application of microwave-assisted synthesis of chlorine-doped surface molecularly imprinted photocatalysts. The invention includes the preparation of chlorine element-doped composite photocatalyst, which is to drop tetrabutyl titanate into absolute ethanol, then add dropwise dilute hydrochloric acid to stir, age, vacuum dry and then calcinate at high temperature; it also includes microwave-assisted synthesis of chlorine element The preparation of doped surface molecularly imprinted photocatalysts is to dissolve the antibiotic template molecules in organic solvents, add functional monomers, crosslinking agents, and initiators after stirring, add the prepared photocatalysts and stir, and inject them into microwave reaction flasks for reaction. After cooling, the solid matter is centrifuged and separated; finally, the solid matter is subjected to Soxhlet extraction to elute the antibiotic template molecule. The chlorine element doped surface molecularly imprinted photocatalyst obtained according to the preparation method of the present invention has photocatalytic selective recognition and can effectively utilize visible light to degrade tetracycline antibiotics in antibiotic-containing wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and relates to microwave-assisted synthesis of surface molecularly imprinted photocatalysts, in particular to a preparation method and application of microwave-assisted synthesis of chlorine-doped surface molecularly imprinted photocatalysts. Background technique [0002] Antibiotics are chemical substances produced by certain microorganisms, animals and plants, substances that can inhibit the proliferation of microorganisms and other cells, and are widely used as drugs for treating various bacterial infections or inhibiting pathogenic microbial infections. Due to the irrational use of antibiotics, it has caused great harm to the environment. Taking tetracycline as an example, many research reports have shown that antibiotics are widely present in soil, surface water, groundwater, sediment, urban sewage, and animal excrement. Therefore, the elimination of environmental ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J37/34C02F1/30C02F1/58
Inventor 刘馨琳闫永胜姚冠新吕鹏马长畅汤艳峰吴宇霆
Owner JIANGSU UNIV
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