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Method for degrading antibiotics by using double perovskite photocatalyst calcium copper titanate

A photocatalyst, copper calcium titanate technology, applied in chemical instruments and methods, special compound water treatment, light water/sewage treatment, etc., can solve the problem of antibiotic degradation of new copper calcium titanate catalyst, which has not been reported yet, and has not yet involved antibiotics Pollutant degradation application and other issues

Inactive Publication Date: 2017-08-29
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has not been involved in the application of photocatalytic degradation of antibiotic pollutants
In particular, the antibiotic degradation performance of novel calcium copper titanate catalysts with different morphologies has not been reported yet.

Method used

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  • Method for degrading antibiotics by using double perovskite photocatalyst calcium copper titanate
  • Method for degrading antibiotics by using double perovskite photocatalyst calcium copper titanate
  • Method for degrading antibiotics by using double perovskite photocatalyst calcium copper titanate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a. The antibiotic is tetracycline dissolved in water, and the concentration is 1×10 -5 mol / L solution, and then placed in ultrasonic treatment to make it a uniform and stable solution;

[0021] b. Under light-shielding conditions, add 40 mg of cubic photocatalyst calcium copper titanate to the solution obtained in step a, stir for 30 minutes, wrap in tin foil, and store in the dark;

[0022] c. The solution system in step b is irradiated with visible light by a 300W xenon lamp with a wavelength of 420nm, and the light energy density is 700mw / cm 2 , the temperature is kept at room temperature 25°C, the remaining solution system is 10cm away from the outlet of the xenon lamp, and 4mL is sampled every 10min;

[0023] d. After centrifuging the sample taken out, take the supernatant to test high-performance liquid chromatography and high-resolution mass spectrometry, analyze the degradation efficiency and degradation products of pollutants, and test the degradation rate of ...

Embodiment 2

[0025] a. The antibiotic is tetracycline dissolved in water, and the concentration is 1×10 -5 mol / L solution, and then placed in ultrasonic treatment to make it a uniform and stable solution;

[0026] b. Under light-shielding conditions, add 40 mg of polyhedral photocatalyst calcium copper titanate to the solution obtained in step a, stir for 30 minutes, wrap in tin foil, and store in the dark;

[0027] c. The solution system in step b is irradiated with visible light by a 300W xenon lamp with a wavelength of 420nm, and the light energy density is 700mw / cm 2 , the temperature is kept at room temperature 25°C, the remaining solution system is 10cm away from the outlet of the xenon lamp, and 4mL is sampled every 10min;

[0028] d. After centrifuging the sample taken out, take the supernatant to test high-performance liquid chromatography and high-resolution mass spectrometry, analyze the degradation efficiency and degradation products of pollutants, and test the degradation rat...

Embodiment 3

[0030] a. The antibiotic is tetracycline dissolved in water, and the concentration is 1×10 -5 mol / L solution, and then placed in ultrasonic treatment to make it a uniform and stable solution;

[0031] b. Under light-shielding conditions, add 40 mg of nanorod-shaped photocatalyst copper calcium titanate to the solution obtained in step a, stir for 30 minutes, wrap in tin foil, and store in the dark;

[0032] c. The solution system in step b is irradiated with visible light by a 300W xenon lamp with a wavelength of 420nm, and the light energy density is 700mw / cm 2 , the temperature is kept at room temperature 25°C, the remaining solution system is 10cm away from the outlet of the xenon lamp, and 4mL is sampled every 10min;

[0033] d. After centrifuging the sample taken out, take the supernatant to test high-performance liquid chromatography and high-resolution mass spectrometry, analyze the degradation efficiency and degradation products of pollutants, and test the degradation...

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Abstract

The invention relates to a method for degrading antibiotics by using a double perovskite photocatalyst, i.e., calcium copper titanate. According to the method, a frequently used antibiotic, i.e., tetracycline, is used as a pollutant probe molecule, and xenon lamp irradiation is carried out in the presence of double perovskite photocatalyst calcium copper titanate (CaCu3Ti4O12) compounds with different morphologies so as to degrade the antibiotic. Degradation results show that the photocatalysis degradation efficiency of the antibiotic reaches 99% or above within 50 min; and results of high-performance liquid chromatography and high-resolution mass spectrometry prove that the antibiotic is eventually degraded into CO2 and H2O. The CaCu3Ti4O12 catalyst prepared in the invention presents high-grade photocatalytic activity in single photocatalytic degradation of organic pollutants and still has high photocatalytic activity after cyclically used a plurality of times. The method can substantially meet demands of application of clean energy and environmental treatment; and an experimental base is laid for innovation and progress of treating technologies for harmful substances in environmental treatment with a novel catalysis material and a novel catalysis technology as breakthrough points.

Description

technical field [0001] The invention relates to a novel photocatalyst copper calcium titanate compound (cube, polyhedron, nanorod and octahedron) with different shapes, which degrades antibiotic pollutants under photocatalysis. Background technique [0002] The research on new organic pollutants is currently a hot field in environmental chemistry research in the world, and the environmental pollution and human health problems caused by them are also an important part of environmental health research in my country. With the continuous deepening of the implementation activities of the International Stockholm Convention, my country is facing the huge challenge of implementing the Convention and reducing and controlling persistent organic pollutants. Antibiotics are widely used in medicine, animal husbandry and aquaculture as an effective drug to treat diseases. However, antibiotic residues in medical waste will cause serious environmental pollution, which has become one of the ...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F101/34C02F101/38
CPCC02F1/30C02F2101/34C02F2101/38C02F2305/10Y02W10/37
Inventor 王传义热沙来提·海里里
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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