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Preparation method of surface imprinting CdS compound photocatalyst based on magnetic carbon material

A technology of surface imprinting and composite light, which is applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of secondary pollution and low efficiency, and achieve high Selectivity, convenient separation and recovery, and good photocatalytic activity

Inactive Publication Date: 2014-05-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many experts and scholars use physical, chemical and biological methods to remove ciprofloxacin residues in the environment, but these methods are less efficient and easily cause secondary pollution

Method used

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  • Preparation method of surface imprinting CdS compound photocatalyst based on magnetic carbon material
  • Preparation method of surface imprinting CdS compound photocatalyst based on magnetic carbon material
  • Preparation method of surface imprinting CdS compound photocatalyst based on magnetic carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: (1) Fe 3 o 4 Preparation of nanospheres: Add 1.35g of ferric chloride hexahydrate and 3.6g of sodium acetate into a beaker containing 50mL of ethylene glycol, stir magnetically until the mixture is evenly dispersed, then transfer the yellow solution to an autoclave, React at 200°C for 8 hours, then take out the autoclave, cool to room temperature, rinse the obtained black magnetic particles with absolute ethanol for 5 times, recover the black magnetic particles with a magnet, and dry them in vacuum at 30°C to obtain Fe 3 o 4 nanospheres.

[0041] (2) CFe 3 o 4 Preparation: 0.5g of Fe 3 o 4 , 4.0g of glucose and 1g of PEG were dissolved in a beaker containing 50ml of distilled water. After ultrasonication for 1.5h, the above solution was transferred to a 100ml reactor and reacted at 160°C for 12h. After that, the reactor was taken out, cooled to room temperature, and washed with distilled water Wash with ethanol at least three times, use a magnet to re...

Embodiment 2

[0049] Example 2: Follow the same steps of the preparation process in Example 1, except that in step (5), the ratio of ciprofloxacin to methacrylic acid is five groups of different ratios, 1:1, 1:2, 1:4, 1 : 6, 1: 8, to prepare different magnetic surface imprinted CdS composite photocatalysts, investigate the impact of different ciprofloxacin and methacrylic acid ratios on the magnetic surface imprinted CdS composite photocatalyst photocatalytic activity, according to Example 1 (8) Steps to investigate the activity of photodegradation of ciprofloxacin antibiotic wastewater. The photocatalytic effect is as figure 2 As shown, it can be seen that the magnetic surface imprinted CdS composite photocatalyst prepared with a ratio of 1:6 has the best photodegradation effect on ciprofloxacin antibiotic wastewater. Under 60 minutes of visible light irradiation, the degradation of ciprofloxacin The rate can reach 62.29%.

Embodiment 3

[0050]Example 3: Carry out the same steps as the preparation process of Example 1, except that in step (5), five groups of different times of 0.5h, 1h, 2h, 3h, and 4h are used for the polymerization time of ultraviolet light irradiation to prepare different magnetic surface imprints CdS composite photocatalyst, investigate the effect of different ultraviolet light irradiation polymerization time on the photocatalytic activity of magnetic surface imprinted CdS composite photocatalyst, according to the steps in Example 1 (8) to investigate the activity of photodegradation of ciprofloxacin antibiotic wastewater. The experimental results show that the magnetic surface imprinted CdS composite photocatalyst prepared by ultraviolet light irradiation for 2 hours has the best photodegradation effect on ciprofloxacin antibiotic wastewater. Under 60 minutes of visible light irradiation, the degradation rate of ciprofloxacin It can reach 66.52%.

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Abstract

The invention belongs to the technical field of preparation of environmental materials, and particularly relates to a preparation method of a surface imprinting CdS compound photocatalyst based on a magnetic carbon material. The preparation method comprises the following steps: coating the surface of Fe3O4 with a C layer on as adopting the Fe3O4 as a carrier, loading CdS to prepare a CdS@C@Fe3O4 compound photocatalyst, and modifying the surface of CdS@C@Fe3O4 by utilizing polyethylene glycol-4000; preparing the magnetic surface imprinting CdS compound photocatalyst by taking the CdS@C@Fe3O4 as a base body, ciprofloxacin as a template molecule, methacrylic acid as a functional monomer, trimethylol-propane trimethacrylate as a cross-linking agent and azobisisobutyronitrile as an initiator by adopting a surface imprinting technology and an ultraviolet light-induced polymerization method. The surface imprinting CdS compound photocatalyst is relatively conveniently, fast and efficiently separated and recovered and has the very high selectivity on photodegradable ciprofloxacin in a binary mixed-phase antibiotic solution. According to the method, photo-induced electrons and a photo-induced cavity of a common CdS photocatalyst are separated to the greatest degree due to the introduction of the C layer, so that the photocatalysis activity of the photocatalyst is enhanced.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and in particular relates to a method for preparing a surface imprinted CdS composite photocatalyst based on magnetic carbonaceous materials. Background technique [0002] Ciprofloxacin is one of the most widely used quinolone antibiotics. It has the characteristics of antibacterial spectrum and strong effect. It is mostly used to treat gastrointestinal and respiratory infections. The side effects will induce bacteria to develop strong drug resistance, and will cause gene mutations to other organisms, etc., which have directly affected the ecology and human health. Therefore, it is an important link to deal with ciprofloxacin residues in life and production reasonably and effectively. Many experts and scholars use physical, chemical and biological methods to remove ciprofloxacin residues in the environment, but these methods are less efficient and easily cause secondar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28C02F1/30C02F1/58
Inventor 逯子扬陈斐陈婷婷宋旼珊罗莹莹闫永胜马中飞霍鹏伟
Owner JIANGSU UNIV
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