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Organic composite photocatalyst for degrading drugs and pathogenic bacteria and preparation method thereof

A photocatalyst and composite light technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve human health hazards, accelerate drug-resistant pathogenic bacteria, etc. problem, to achieve the effect of removal, improvement of photocatalytic degradation efficiency, and good stability

Active Publication Date: 2022-07-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the drugs in the water can enhance the drug resistance of pathogenic bacteria, and gradually accelerate the formation of drug-resistant pathogenic bacteria, thus causing greater harm to human health.

Method used

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  • Organic composite photocatalyst for degrading drugs and pathogenic bacteria and preparation method thereof
  • Organic composite photocatalyst for degrading drugs and pathogenic bacteria and preparation method thereof
  • Organic composite photocatalyst for degrading drugs and pathogenic bacteria and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] [Example 1] Preparation of supported photocatalyst CP / DAX-8

[0052] CP / DAX-8 is prepared by stirring cercosporin and macroporous adsorption resin in a solvent: weigh 40 mg of cercosporin, dissolve it in 50 mL of methanol solution, add 1 g of macroporous adsorption resin Resin TM DAX-8), after magnetic stirring for 24h, the solid composite material was obtained by suction filtration. The solid was washed three times with methanol and ultrapure water, and then the solid material was vacuum-dried at 35°C for 24h, and finally the supported photocatalyst CP / DAX was obtained. -8.

[0053] For the raw material macroporous adsorption resin Supelite in this implementation TM DAX-8, cercosporin, and the prepared photocatalyst CP / DAX-8 were tested by infrared, figure 1 The infrared spectra of the macroporous adsorption resin, cercosporin and CP / DAX-8 in this example are shown by figure 1 It can be seen that the infrared spectrum of the synthesized CP / DAX-8 contains both the...

Embodiment 2

[0055] [Example 2] Degradation of ciprofloxacin

[0056] At room temperature, 40 mg of the catalyst CP / DAX-8 prepared in Example 1 was added to 10 mL of a 10 mg / L ciprofloxacin solution with a pH value of 7. Stir for 30 min under dark conditions, then at 15W (14.8mW cm -2 ) under fluorescent irradiation and continued stirring for 3 h. Three parallels were set in each group, and a sample was taken every 30 min, and the remaining amount of ciprofloxacin in the solution was detected by HPLC. The liquid phase conditions were 0.1% phosphoric acid water:acetonitrile=80:20, the flow rate was 1 mL / min, the detection wavelength was 277 nm, and the column temperature was 25°C. The test results showed that the degradation rate of ciprofloxacin reached 99.8%.

Embodiment 3

[0057] [Example 3] Degradation of ciprofloxacin

[0058] At room temperature, 40 mg of the catalyst CP / DAX-8 prepared in Example 1 was added to 10 mL of a 50 mg / L ciprofloxacin solution with a pH of 7. Stir for 30 min under dark conditions, then at 15W (14.8mW cm -2 ) Continue to stir for 3h under fluorescent irradiation, take a sample every 30min, and detect the remaining amount of ciprofloxacin in the solution by HPLC, and the detection method is the same as that in Example 2. The detection results showed that the degradation rate of ciprofloxacin reached 76.7%.

[0059] image 3 It is the degradation effect of ciprofloxacin with different initial concentrations (10mg / L, 20mg / L, 30mg / L, 40mg / L, 50mg / L) under CP / DAX-8 photocatalysis. Depend on image 3 It can be seen that the low concentration of ciprofloxacin is more conducive to improving the removal efficiency of CP / DAX-8.

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Abstract

The invention discloses an organic composite photocatalyst for degrading medicines and pathogenic bacteria and a preparation method thereof, and belongs to the technical field of water pollutant treatment. In the method of the present invention, a simple green method is used to load cercosporin on the macroporous adsorption resin to obtain a supported photocatalyst. It can generate singlet oxygen, superoxide radicals, etc. under the irradiation of fluorescent lamps and even sunlight. These oxygen free radicals can react with drugs and pathogenic bacteria, so as to achieve the purpose of degrading drugs and pathogenic bacteria. The method can completely degrade drugs within 3 hours of reaction under light, these drugs include: antibacterial drugs: quinolones ciprofloxacin, gatifloxacin, moxifloxacin, ofloxacin, enrofloxacin , sparfloxacin, trimethoprim sulfonamides, and antiviral drugs: chloroquine phosphate. In addition, the photocatalyst can also effectively inhibit the pathogenic bacteria Staphylococcus aureus, realizing the simultaneous removal of drugs and pathogenic bacteria in water pollution.

Description

technical field [0001] The invention relates to an organic composite photocatalyst for degrading medicines and pathogenic bacteria and a preparation method thereof, and belongs to the technical field of water pollutant treatment. Background technique [0002] The adverse effects of drug pollution in water bodies on human life and health have aroused widespread concern in society. At the same time, drugs in water can enhance the drug resistance of pathogenic bacteria, and gradually accelerate the formation of drug-resistant pathogenic bacteria, thus causing greater harm to human health. At present, in order to treat pollutants in the water environment, people have developed physical methods (adsorption, filtration, flocculation, etc.), biological methods (activated sludge method), chemical methods (Fenton oxidation method, electrochemical method, photocatalysis method, etc.) Law). Among them, the photocatalytic method has received extensive attention due to its excellent ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/08B01J35/10C02F1/30C02F1/50C02F101/30
CPCB01J31/08B01J35/004B01J35/1004C02F1/30C02F1/50C02F2101/30Y02W10/37
Inventor 饶义剑张艳吴雅雯袁振波杨丽烽
Owner JIANGNAN UNIV
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