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

A surface molecular imprinting and photocatalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Slow rate and other issues, to achieve the effect of improving photocatalytic activity, improving photodegradation activity, and reducing the bandgap width

Inactive Publication Date: 2013-03-13
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
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Effect test

Embodiment 1

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

[0032] (2) Completely dissolve 1mmol of tetracycline template molecule in 30mL acetonitrile. After stirring in a water bath at 25°C for 30min, add the functional monomer (4-vinylpyridine) to the above solution and stir for 1h, then add the crosslinking agent (trimethylol Base propane acrylate) and initiator (azobisisobutyl cyanide) are stirred for 30 minutes, where the ratio of the amount of template molecule: functional monomer: crosslinking agent: initiator is 1:2:6:0.3; take 1g (1) Add the photocatalyst ...

Embodiment 2

[0035] According to the steps in Example 1, the difference is that in (2), 1mmol of tetracycline template molecules are completely dissolved in 30mL of toluene, and after stirring in a water bath at 25°C for 30 minutes, the functional monomer (4-vinylpyridine) is added to the above solution Stir for 1h, then add crosslinking agent (trimethylolpropane acrylate) and initiator (azobisisobutyronitrile) and stir for 30min, where template molecule: functional monomer: crosslinking agent: the amount of initiator The ratio is 1:2:6:0.3; take 1g of the photocatalyst synthesized in (1) and add it to the solution and keep stirring for 30min. Then inject the solution into a microwave reaction flask. Microwave 600W, 70℃ for 60min, magnetic force during heating The stirring speed is 2000 rpm, natural cooling, centrifugal separation of the obtained solution to obtain the solid matter, placed in a 60 ℃ vacuum drying oven for 12 hours; the obtained solid powder is Soxhlet extracted and eluted te...

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 minutes. Stir for 1h, then add crosslinking agent (trimethylolpropane acrylate) and initiator (azobisisobutyronitrile) and stir for 30min, where template molecule: functional monomer: crosslinking agent: the amount of initiator The ratio is 1:2:6:0.3; take 1g of the photocatalyst synthesized in (1) and add it to the solution and keep stirring for 30min. Then inject the solution into a microwave reaction flask. Microwave 600W, 70℃ for 60min, magnetically stir during heating Rotation speed is 2000rpm, natural cooling, centrifugal separation of the resulting solution to obtain the solid matter, placed in a 60℃ vacuum drying oven for 12h; the obtained solid powder is Soxhlet extracted and eluted templa...

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Abstract

The invention belongs to the technical field of environment material preparation, and relates to a preparation method and an application of microwave-assisted synthesized chlorine-element-doped surface molecular imprinting photocatalyst. The preparation method comprises a preparation for chlorine-element-doped composite photocatalyst, comprising the following steps of: dropping tetrabutyl titanate to absolute ethyl alcohol, dropwise adding diluted hydrochloric acid, stirring and ageing the mixture, carrying out vacuum drying on the stirred and aged mixture and carrying out high-temperature calcinations on the vacuum-dried mixture; the preparation method further comprises a preparation for microwave-assisted synthesized chlorine-element-doped surface molecular imprinting photocatalyst, comprising the following steps of: dissolving antibiotic template molecules to an organic solvent; adding a functional monomer, a cross-linking agent and a initiator for mixing after stirring; injecting the stirred prepared photocatalyst to a microwave reaction kettle for reaction, cooling the photocatalyst and carrying out centrifugal separation to obtain solid substance; and carrying out soxhlet extraction on the solid substance to elute antibiotic template molecule to prepare the microwave-assisted synthesized chlorine-element-doped surface molecular imprinting photocatalyst. The microwave-assisted synthesized chlorine-element-doped surface molecular imprinting photocatalyst prepared by the preparation method disclosed by the invention has a photo-catalysis selective recognition function, and can effectively degrade tracycline antibiotics in the waste water containing antibiotics by utilizing visible light.

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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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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