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Preparation method and application of molecularly imprinted polymer of sulfadiazine for controlled catalytic degradation

A sulfadiazine, catalytic degradation technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve controllable catalytic degradation and good regeneration performance.

Inactive Publication Date: 2012-11-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few reports on the coupling of photocatalytic technology and molecular recognition technology to prepare specific catalytic materials. It is of great significance to study controllable catalytic materials and use them to catalytically degrade pollutants in the environment.

Method used

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  • Preparation method and application of molecularly imprinted polymer of sulfadiazine for controlled catalytic degradation
  • Preparation method and application of molecularly imprinted polymer of sulfadiazine for controlled catalytic degradation
  • Preparation method and application of molecularly imprinted polymer of sulfadiazine for controlled catalytic degradation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: (1) SiO 2 Synthesis of nanoparticles: Mix 32.5mL of absolute ethanol, 49.5mL of distilled water and 18mL of concentrated ammonia water evenly, stir magnetically at 1000rpm for 2min, then add 91mL of absolute ethanol and 9mL of tetraethyl orthosilicate to the above mixed solution, room temperature Stir at 400rpm for 2.0h, wash with absolute ethanol several times after high-speed centrifugation, and dry at room temperature in vacuum to obtain SiO 2 Nanoparticles.

[0037] 2)SiO2 2 / ZnO / ZnS nanoparticles preparation: 2g SiO 2 Nanoparticles were dispersed in a mixed solution of 40 mL of absolute ethanol and 60 mL of distilled water, heated to 90 °C under stirring at 400 rpm, and 1.1 g of zinc acetate, 0.75 g of thioacetamide and 5.32 mL of triethylamine were added after 10 min, and the mixed solution was Heating with magnetic stirring at 90°C for 1h, the obtained product was dried and calcined in a resistance furnace at 700°C for 3 hours, and the light yell...

experiment example 1

[0044] Experimental example 1: Using the imprinted catalytic material and non-imprinted catalytic material prepared in the actual amount above, using adsorption synergistic catalysis, prepare 200 mL of sulfadiazine solution with an initial concentration of 0.1 mmol / L, and adjust the pH value to 7.0; weigh 0.2 g Imprinted and non-imprinted catalytic materials are added to the sulfadiazine solution, the temperature of the catalytic system is controlled at 15°C, and the ultraviolet light source and tungsten lamp (visible) light source are used to irradiate, and the residual concentration of sulfadiazine in the reaction system at different times is measured to calculate and obtain The amount of sulfadiazine degraded.

[0045] The degradation rate was calculated by the following formula:

[0046]

experiment example 2

[0047] Experimental Example 2: Using the imprinted catalytic material and non-imprinted catalytic material prepared in the above actual dosage, prepare 200 mL of sulfadiazine solution with an initial concentration of 0.1 mmol / L, and adjust the pH value to 8.0; weigh 0.2 g of imprinted and non-imprinted catalytic materials respectively Add the material into the sulfadiazine solution, control the temperature of the catalytic system at 45°C, irradiate with an ultraviolet light source and a tungsten lamp (visible) light source, measure the residual concentration of sulfadiazine in the reaction system at different times to calculate the amount of degraded sulfadiazine .

[0048] The following is a detailed description of each accompanying drawing:

[0049] figure 1 For silicon spheres (a), SiO 2 / ZnO / ZnS nanoparticles (b), RAFT reagent functionalized SiO 2 Fourier transform infrared spectra of / ZnO / ZnS nanoparticles (c) and imprinted polymers (d). From the infrared image of the...

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Abstract

The invention relates to a preparation method and application of a molecularly imprinted polymer of sulfadiazine for controlled catalytic degradation, belonging to the technical field of material preparation and pollution control of water environments. The molecularly imprinted polymer of sulfadiazine for controlled catalytic degradation is prepared according to the steps of preparation of a substrate material of a molecularly imprinted controlled catalytic material by loading catalytic inorganic nanoparticles on a surface of a silica nanosphere, and coating of a layer of imprinted polymer on the surface of the silica nanospher by a controlled polymerization technology. When observed through a transmission electron microscope, the catalytic material has a uniform microstructure and good dispersibility. The catalytic degradation capability of the catalyst is evaluated by a static catalytic degradation experiment. Experimental results show that the catalyst has certain selective catalytic degradation capability for sulfadiazine and good regeneration performance and can be used in certain potential applications.

Description

technical field [0001] The invention belongs to the technical field of material preparation and water environment pollution control, and relates to a new type of controllable catalytic molecularly imprinted polymer prepared by surface-induced reversible addition cracking chain transfer polymerization technology, in particular to a controllable catalytic degradation molecule of sulfadiazine Preparation methods and applications of imprinted polymers. Background technique [0002] Sulfonamides are common synthetic antibiotics, mostly derived from p-aminobenzenesulfonamide (referred to as sulfonamide) as the basic structure, and have a broad antibacterial spectrum. However, because it is transferred to the human body through bioaccumulation, it can damage human organs, increase drug resistance and produce some chronic poisoning phenomena. Common sulfonamide antibiotics include Sulfadiazine, Sulfamethazine, Sulfamethizol, Sulfafurazole, Sulfamonomethoxine, etc. More than 95% of...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F2/44C08J9/28B01J31/26
Inventor 潘建明徐龙城戴江栋孟敏佳闫永胜
Owner JIANGSU UNIV
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