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Method for preparing selectively degraded ciprofloxacin photocatalyst

A selective, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult target removal, lack of selectivity, etc., to achieve improved efficiency and strong selectivity The effect of treating antibiotic wastewater

Inactive Publication Date: 2011-07-20
ZHENJIANG GAOPENG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People have modified semiconductors and compound semiconductors to deal with environmental pollution and achieved good results, but they are not selective, and it is difficult to remove the target in complex water bodies where multiple pollutants coexist.

Method used

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  • Method for preparing selectively degraded ciprofloxacin photocatalyst
  • Method for preparing selectively degraded ciprofloxacin photocatalyst
  • Method for preparing selectively degraded ciprofloxacin photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0021] Embodiment 1-4: (1) Hydrothermal synthesis of ZnS semiconductor materials: firstly, Zn(COOH) 2 and CS(NH 2 ) 2 Dissolve in an appropriate amount of distilled water at a mass ratio of 1:2 (6 mmol : 12 mmol), stir magnetically at a constant rate for 4 h to fully mix the two, and then add the solution to a polytetrafluoroethylene-lined reactor In this method, the total solution volume does not exceed 80% of the volume of the reactor, react at a constant temperature of 150 ° C for 24 h, and naturally cool at room temperature after the reaction is completed. Drying under vacuum at 60°C finally obtains ZnS semiconductor microspheres with uniform particle size.

[0022] (2) A certain amount of ZnS microspheres prepared by hydrothermal treatment was added to a certain amount of methanol solution dissolved in acrylamide so that the mass ratio of ZnS and acrylamide was 3:1 (15 mmol : 5 mmol). After stirring at room temperature for 20 h, the acrylamide-modified ZnS particles ...

Embodiment 5

[0031] Example 5: Use the photocatalyst prepared in (3) in Example 1 to degrade the mixed solution of ciprofloxacin and interfering substances (gatifloxacin, chloramphenicol) at the same concentration, and calculate the degradation efficiency of different substances And then calculate its selectivity coefficient for different substances.

[0032] E% = ×100 % (1); D = (2); α= (3); α γ = (4)

[0033] where C 0 , C e are the initial and degraded concentrations of ciprofloxacin (mg L -1 ); D is the distribution coefficient, D CIP ,D M are the partition coefficients of ciprofloxacin and interfering substances, respectively; α is the selectivity coefficient, α i , α n are the selectivity coefficients of imprinted and blank polymer photocatalysts, α r is the relative selectivity coefficient.

[0034] The experimental results show that the degradation efficiency of MIP-2 photocatalyst to ciprofloxaci...

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Abstract

The invention discloses a method for preparing a selectively degraded ciprofloxacin photocatalyst, and belongs to the technical fields of material preparation and environmental pollution treatment. The method comprises the following steps of: (1) hydrothermal synthesis of a ZnS semiconductor material; (2) ZnS surface modification; (3) preparation of a molecular imprinting polymer photocatalyst; and (4) elution of template modules in the imprinting polymer from the obtained solid powdery substance. The photocatalytic degradation process of the molecular imprinting polymer photocatalyst can effectively fulfill the purposes of selective identification, adsorption and catalytic degradation of target pollutants, the effective degradation efficiency of the target substance is improved, and the photocatalyst has the advantage of strong selective treatment of antibiotic wastewater.

Description

technical field [0001] The invention relates to a method for preparing a semiconductor photocatalyst imprinted with ciprofloxacin by using a surface molecular imprinting technology, and belongs to the technical field of material preparation and environmental pollution control. Background technique [0002] Ciprofloxacin belongs to fluoroquinolones, which has strong antibacterial ability and broad-spectrum bactericidal characteristics, and is widely used in aquaculture. However, its drug resistance and its side effects also seriously affect people's lives, and long-term low-level accumulation is prone to drug resistance; studies have shown that ciprofloxacin has serious liver and kidney toxicity, which directly threatens people's lives and health. Therefore, the rational treatment of antibiotic and medical wastewater in domestic wastewater is an important link. At present, photocatalytic technology has been widely used in the research of wastewater treatment in the environme...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J20/26B01J37/00C02F1/30C02F101/38
Inventor 闫永胜张孝杰霍鹏伟高晓艳逯子扬高旬吴迪刘小琳
Owner ZHENJIANG GAOPENG PHARMA
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