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Catalyst for photocatalytic degradation of antibiotic as well as preparation method and application thereof

A catalyst and photocatalysis technology, which is applied in the field of environmental technology and water treatment, can solve the problems of low catalytic efficiency of enrofloxacin hydrochloride, low catalytic efficiency of catalyst, complex catalyst synthesis method, etc., and achieve high photocatalytic activity and degradation efficiency, The use method is simple, the synthesis method is simple and the pollution-free effect

Inactive Publication Date: 2017-01-11
NAT UNIV OF SINGAPORE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application publication CN201310016530.0 relates to a photocatalyst for visible light catalytic degradation of typical antibiotics in water. The synthesis method of the catalyst is simple, but the catalytic efficiency of the catalyst is low. The catalytic efficiency is calculated according to the change of absorbance, and it takes two hours to reach 98%. Tetracycline degradation rate
Chinese patent CN201210500672.X reports a floating magnetic conductive surface molecularly imprinted composite photocatalyst. The catalyst synthesis method is relatively complicated, and the catalytic efficiency of photocatalytic degradation of enrofloxacin hydrochloride is low. The catalytic efficiency is calculated according to the change of absorbance. It takes one hour to achieve 87% degradation of enrofloxacin hydrochloride

Method used

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  • Catalyst for photocatalytic degradation of antibiotic as well as preparation method and application thereof
  • Catalyst for photocatalytic degradation of antibiotic as well as preparation method and application thereof
  • Catalyst for photocatalytic degradation of antibiotic as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This example is one of the preparation and experiment examples of the titanium dioxide catalyst used for photocatalytic degradation of antibiotics according to the present invention.

[0047] 1. Preparation of catalyst:

[0048] 1) Preparation steps:

[0049] a. At room temperature, diffuse 1 gram of titanium dioxide powder (anatase structure, with a purity of 99.9%) into 50 milliliters of 5 mol / L sodium hydroxide solution, and magnetically stir for 10 minutes to obtain a milky white titanium dioxide suspension;

[0050] b. Transfer the titanium dioxide suspension to a 100 ml polytetrafluoroethylene-lined reactor for homogeneous hydrothermal reaction. The reactor rotation speed is 20 revolutions per minute, the temperature is 200°C, and the hydrothermal time is 24 hours;

[0051] c. Centrifuge and wash the reaction product obtained in step b to neutrality to obtain a white paste precipitate; disperse and soak the paste precipitate in 50 ml of 0.1mol / L hydrochloric acid...

Embodiment 2

[0066] This example is one of the preparation and experiment examples of the titanium dioxide catalyst used for photocatalytic degradation of antibiotics according to the present invention.

[0067] 1. Preparation of catalyst:

[0068] a. At room temperature, diffuse 0.5 gram of titanium dioxide powder (anatase structure, with a purity of 99.9%) into 30 milliliters of 5 mol / L sodium hydroxide solution, and magnetically stir for 10 minutes to obtain a milky white titanium dioxide suspension;

[0069] b. Transfer the suspension to a 100 ml polytetrafluoroethylene-lined reactor for homogeneous hydrothermal reaction. The temperature is 220° C., the hydrothermal time is 24 hours, and the reactor rotation speed is 20 revolutions per minute. white paste precipitate;

[0070] c. Centrifuge and wash the reaction product obtained in step b to neutrality to obtain a white paste precipitate; disperse and soak the paste precipitate in 30 ml of 0.1mol / L hydrochloric acid solution, and magn...

Embodiment 3

[0082] This example is one of the preparation and experiment examples of the titanium dioxide catalyst used for photocatalytic degradation of antibiotics according to the present invention.

[0083] 1. Preparation of catalyst:

[0084] a. At room temperature, diffuse 2 grams of titanium dioxide powder (anatase structure, with a purity of 99.9%) into 80 milliliters of 5 mol / L potassium hydroxide solution, and magnetically stir for 10 minutes to obtain a milky white titanium dioxide suspension;

[0085] b. Transfer the milky white suspension to a 100 ml polytetrafluoroethylene-lined reactor for homogeneous hydrothermal reaction. The reactor rotation speed is 20 revolutions per minute, the temperature is 200°C, and the hydrothermal time is 24 hours;

[0086] c. Centrifuge and wash the reaction product obtained in step b to neutrality to obtain a white paste precipitate; disperse and soak the paste precipitate in 100 ml of 0.1mol / L hydrochloric acid solution, and magnetically stir...

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Abstract

The invention belongs to the field of environmental technology and water treatment and specifically relates to a preparation method of a catalyst for photocatalytic degradation of antibiotic, a catalyst prepared by the method and application of the catalyst for photocatalytic degradation of antibiotic. The catalyst is anatase-phase banded-structure nanocrystal titanium dioxide exposing the crystal face {100}, and is synthesized by a homogeneous hydrothermal reaction and a calcination technology. The catalyst shows outstanding photocatalytic degradation performance on the photocatalytic degradation of broad-spectrum antibiotic medicines such as oxytetracycline, tetracycline hydrochloride, amoxicillin, norfloxacin and enrofloxacin. The catalyst has the characteristics of high activity, stable performance, easiness in separation, no toxicity and the like; the synthesis technology is pollution-free; the catalyst has a broad application prospect while the antibiotic medicine pollution is increasingly severe.

Description

technical field [0001] The invention belongs to the field of environmental technology and water treatment, and in particular relates to a strip-shaped single-crystal nano-titanium dioxide photocatalyst used for photocatalytic degradation of low-concentration water-soluble antibiotics and its preparation method and application. Background technique [0002] Antibiotics are a class of secondary metabolites with anti-pathogen or other activities produced by microorganisms (including bacteria, fungi, actinomycetes) or higher animals and plants, which can interfere with cell development and function, and are widely used as Drugs that treat various bacterial infections or inhibit pathogenic microbial infections. Its discovery and application have played a huge role in the fields of medical treatment and animal and plant pest control. However, due to the abuse or overuse of antibiotics, the environmental problems caused by antibiotics, especially water and soil pollution, have bec...

Claims

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Application Information

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IPC IPC(8): B01J21/06B82Y30/00B82Y40/00C02F1/30C02F1/58A62D3/17C02F101/38C02F101/34A62D101/26A62D101/28
CPCY02W10/37
Inventor 潘锋陈伟许国勤张龙珠
Owner NAT UNIV OF SINGAPORE
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