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Preparation method of a selective and specific recognition ppy@znfe2o4 magnetically imprinted composite photocatalyst

A photocatalyst, znfe2o4 technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor catalytic activity, achieve good photocatalytic activity, The effect of good selectivity and stability

Inactive Publication Date: 2018-06-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the photocatalytic reaction, pure ZnFe 2 o 4 At the same time, in practical applications, antibiotic wastewater contains a variety of substances with low toxicity but high content. How to selectively decompose pollutants with low content and high toxicity from many substances has become a problem that restricts the development of photocatalyst technology. a real problem

Method used

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  • Preparation method of a selective and specific recognition ppy@znfe2o4 magnetically imprinted composite photocatalyst
  • Preparation method of a selective and specific recognition ppy@znfe2o4 magnetically imprinted composite photocatalyst
  • Preparation method of a selective and specific recognition ppy@znfe2o4 magnetically imprinted composite photocatalyst

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Experimental program
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Embodiment 1

[0035] (1) ZnFe 2 o 4 Preparation of photocatalyst: First, add 0.808g of ferric nitrate nonahydrate and 0.297g of zinc nitrate hexahydrate into a mixed organic solvent containing 50mL of ethylene glycol and ethanol, stir magnetically until the mixture is uniform, then transfer to a stainless steel reaction kettle and heat to 200°C Reaction after 24h. After cooling to room temperature, separate with a magnet, wash with deionized water and ethanol three times each to remove excess reactants and side reactants, and vacuum dry at 50°C to obtain spherical ZnFe 2 o 4 Nanoparticles;

[0036] (2)PPy@ZnFe 2 o 4 Preparation of magnetically imprinted composite photocatalyst: 0.02 g of ciprofloxacin and 0.1 mL of pyrrole were added to 30 mL of dimethyl sulfoxide, dissolved by ultrasonic waves and stirred at room temperature to form a pre-assembly solution. With the ZnFe that makes in the 0.3g step (1) 2 o 4 Add the magnetic photocatalyst to the above pre-assembly solution, stir un...

Embodiment 2

[0040] Carry out by the same step of embodiment 1 preparation technology, difference is that in step (1) ZnFe 2 o 4 During semiconductor synthesis, the temperature of solvothermal synthesis is 150°C, 180°C, and 250°C to prepare different ZnFe 2 o 4 catalyst of light.

Embodiment 3

[0042] Carry out by the same step of embodiment 1 preparation technology, difference is that in step (1) ZnFe 2 o 4 During semiconductor synthesis, the time of solvothermal synthesis is 12h, 18h, 20h, 32h to prepare different ZnFe 2 o 4 catalyst of light.

[0043] By comparison of Example 2, Example 3 and Example 1, it was found that the ZnFe generated when the ambient temperature was 200°C for 24h 2 o 4 Semiconductor photocatalysts have relatively the best yield and catalytic activity. Therefore, this application selects the solvothermal reaction time as 24h, and the ambient temperature is 200°C to prepare ZnFe 2 o 4 Semiconductor photocatalyst, and preserved for PPy@ZnFe 2 o 4 Preparation of magnetically imprinted composite photocatalysts.

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Abstract

The present invention provides a method for preparing a selectively and specifically identified PPy@ZnFe2O4 magnetically imprinted composite photocatalyst, which is carried out according to the following steps: the steps of preparing ZnFe2O4 magnetic photocatalyst and the steps of preparing PPy@ZnFe2O4 magnetically imprinted composite photocatalyst . The PPy@ZnFe2O4 magnetically imprinted composite photocatalyst prepared by this method uses ZnFe2O4 magnetic photocatalyst as the matrix material, which not only has catalytic activity, but also avoids the disadvantage that the catalyst is difficult to recycle after use; at the same time, pyrrole is used as the functional monomer and catalytic active substance, It not only simplifies the preparation process of the imprinted polymer, but also further improves the activity of ZnFe2O4 magnetic photocatalyst.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and in particular relates to a selective and specific identification of PPy@ZnFe 2 o 4 A method for preparing a magnetically imprinted composite photocatalyst. Background technique [0002] Antibiotics have the characteristics of broad-spectrum antibacterial activity and good bactericidal effect, and are widely used in human medicine, aquaculture and animal husbandry. However, due to the abuse of antibiotics, the residue of antibiotics in the environment and the problem of drug resistance caused by them are becoming more and more serious, and the negative impact on human beings and the ecological environment is increasing day by day. Studies have confirmed that antibiotics can produce toxicity to the human digestive system, central nervous system and blood system, and can also damage organs such as the kidney and heart. In addition, it can also make the viruses in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C02F1/30C02F101/38
CPCY02W10/37
Inventor 王友山逯子扬闫永胜朱志赵晓旭高乃玲霍鹏伟
Owner JIANGSU UNIV
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