Polypyrrole/cadmium sulfide imprinted composite photocatalyst as well as preparation method and application thereof

A photocatalyst, cadmium sulfide technology, applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, chemical instrument and method, etc., can solve non-pathogenic bacterial variation, emission, soil function and The impact of aquatic organisms and other issues, to achieve strong stability and good results

Active Publication Date: 2020-08-07
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most farmers or farmers do not know the characteristics of these drugs, resulting in a large amount of fluoroquinolone antibiotics eventually being discharged into the soil and the surrounding water environment
When the content of antibiotics in the environment reaches the upper limit, it will have a great impact on the function of the soil and aquatic organisms. The more serious consequence is that the non-pathogenic bacteria in the environment will develop resistance and then mutate into highly resistant bacteria. Drug-resistant pathogenic bacteria pose a huge threat to human health

Method used

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  • Polypyrrole/cadmium sulfide imprinted composite photocatalyst as well as preparation method and application thereof
  • Polypyrrole/cadmium sulfide imprinted composite photocatalyst as well as preparation method and application thereof
  • Polypyrrole/cadmium sulfide imprinted composite photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the preparation of cadmium sulfide photocatalyst

[0028] Synthesis of cadmium sulfide photocatalyst by solvothermal method.

[0029] Weigh 6.41 g of Cd(NO 3 ) 2 4H 2 O and 4.74 g of thiourea were added to a dry Teflon-lined autoclave with a capacity of 100 mL. After injecting 55mL of ethylenediamine thereinto then, the autoclave was sealed and heated at 180°C for 72 hours, and rapidly cooled to room temperature after the thermal reaction of the solvent. The obtained yellow precipitate was centrifuged, rinsed three times with a mixed solution of ethanol / distilled water with a volume ratio of 8:2, and finally dried in a vacuum oven at 60 °C.

Embodiment 2

[0030] Example 2: Preparation of polypyrrole / cadmium sulfide imprinted composite photocatalyst (MIP-PPy / CdS)

[0031] Weigh 0.02g sparfloxacin and dissolve in 15mL dimethyl sulfoxide, then add 1mL pyrrole. Then the mixed solution was sonicated for 15 min and stirred for 5 h. Subsequently, 0.15 g of cadmium sulfide photocatalyst, 0.15 g of N,N'-methylenebisacrylamide, 0.011 g of ammonium persulfate and 7.0 μL of tetramethylethylenediamine were added dropwise to the above mixture, and the 2 Remove air. Then, at a temperature of 45°C, N 2 Polymerization under atmosphere for 12h. Finally, the resulting product was rinsed with a mixed solution of ethanol / distilled water with a volume ratio of 8:2 and ultrasonically treated for 5 minutes to remove sparfloxacin. The product was collected and dried in a vacuum oven at 60°C.

Embodiment 3

[0032] Example 3: Preparation of polypyrrole / cadmium sulfide non-imprinted composite photocatalyst (NIP-PPy / CdS)

[0033] The polypyrrole / cadmium sulfide non-imprinted composite photocatalyst was synthesized according to the experimental steps of Examples 2 and 3 above. Just need to keep other conditions constant during the synthesis process, but do not add sparfloxacin.

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PUM

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Abstract

The invention discloses a polypyrrole / cadmium sulfide imprinted composite photocatalyst which comprises a crystalline cadmium sulfide photocatalyst serving as a carrier and a polypyrrole imprinted layer formed on the surface of the carrier. The polypyrrole imprinted layer is internally provided with holes formed by taking sparfloxacin as template molecules. The invention also discloses a preparation method and application of the photocatalyst, and a method for degrading sparfloxacin. The polypyrrole / cadmium sulfide imprinted composite photocatalyst provided by the invention has strong stability and can selectively and effectively degrade sparfloxacin.

Description

technical field [0001] The invention belongs to the field of organic chemistry, in particular to a polypyrrole / cadmium sulfide imprinted composite photocatalyst and its preparation method and application. Background technique [0002] Fluoroquinolone antibiotics are widely used in clinical treatment of various infectious diseases, aquaculture, fruit and vegetable cultivation and other fields. Sparfloxacin is a synthetic fluoroquinolone antibiotic, which also includes lomefloxacin, norfloxacin, ciprofloxacin, etc. [0003] At present, the production of fluoroquinolone antibiotics in my country is very large. Rural and coastal aquaculture areas use a lot of these antibiotics. However, most farmers or breeders do not know the characteristics of these drugs, resulting in a large amount of fluoroquinolone antibiotics eventually being discharged into the soil and the surrounding water environment. When the content of antibiotics in the environment reaches the upper limit, it wi...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/06C02F1/30C02F101/38
CPCB01J31/26B01J31/06C02F1/30C02F2101/38C02F2305/10B01J35/39Y02W10/37
Inventor 李彬黄略略段续范大明梁勇
Owner SHENZHEN POLYTECHNIC
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