Preparation method and application of photocatalysis nanometer material for degrading TC (tetracycline)

A technology of nanomaterials and catalytic materials, applied in the field of one-step hydrothermal Ag+ doped SrTiO3 nanomaterials and its preparation, can solve the problems of interfering with the endocrine of aquatic species, discontinuity of wastewater discharge, refractory antibiotic degradation, etc., and achieve low cost , reduce energy consumption, and facilitate mass production

Inactive Publication Date: 2018-06-22
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the wastewater produced in the antibiotic pharmaceutical process contains high concentrations of active antibiotics, which can inhibit the growth of microorganisms in water treatment, interfere with the endocrine of aquatic species, promote the production of drug-resistant genes, and the discontinuity of wastewater discharge during the production process And the characteristics of large fluctuations in concentration make it difficult to degrade the antibiotics in the production wastewater

Method used

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  • Preparation method and application of photocatalysis nanometer material for degrading TC (tetracycline)
  • Preparation method and application of photocatalysis nanometer material for degrading TC (tetracycline)
  • Preparation method and application of photocatalysis nanometer material for degrading TC (tetracycline)

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of SrTiO prepared by hydrothermal method 3 Spherical nanomaterials are carried out as follows:

[0028] A. Dissolve 1.26g of citric acid in 15mL of absolute ethanol;

[0029] B, in step A solution, add dropwise the solution containing 1.058g Sr(NO 3 ) 2 15mL solution, then dropwise added 1.5mL isopropyl titanate, stirred to mix evenly to form a white solution;

[0030] C, drip NaOH solution in above-mentioned mixed solution, adjust pH;

[0031] D. Transfer the solution to a 100mL polytetrafluoroethylene liner, react at 150°C for 36 hours, and then wash three times with glacial acetic acid, absolute ethanol, and deionized water;

[0032] E. Dry the centrifuged product in an oven at 60-80°C for 12 hours.

[0033] SrTiO prepared by the present invention 3 The degradation rate of nanomaterials to tetracycline is 9.09% when the xenon lamp is irradiated for 120 minutes.

Embodiment 2

[0035] A kind of Ag-SrTiO prepared by hydrothermal method 3 Spherical nanomaterials are carried out as follows:

[0036] A. Dissolve 1.26g of citric acid in 15mL of absolute ethanol;

[0037] B, in step A solution, add dropwise the solution containing 1.058g Sr(NO 3 ) 2 15mL solution, then dropwise added 1.5mL isopropyl titanate, stirred to mix evenly to form a white solution;

[0038] C, add dropwise to the white solution that contains 0.02497g AgNO 3 15mL solution;

[0039] D, drop NaOH solution in above-mentioned mixed solution, adjust pH;

[0040] E. Transfer the solution to a 100mL polytetrafluoroethylene liner, react at 150°C for 36 hours, and then wash three times with glacial acetic acid, absolute ethanol, and deionized water;

[0041] F. Dry the centrifuged product in an oven at 60-80°C for 12 hours.

[0042] Ag-SrTiO prepared by the present invention 3 Nanomaterials (S3), the degradation rate of tetracycline can reach 79.63% when illuminated by xenon light fo...

Embodiment 3

[0044] A. Dissolve 1.26g of citric acid in 15mL of absolute ethanol;

[0045] B, in step A solution, add dropwise the solution containing 1.058g Sr(NO 3 ) 2 15mL solution, then dropwise added 1.5mL isopropyl titanate, stirred to mix evenly to form a white solution;

[0046] C, add dropwise to the white solution that contains 0.0125g AgNO in step B 3 15mL solution;

[0047] D, drop NaOH solution in above-mentioned mixed solution, adjust pH;

[0048]E. Transfer the solution to a 100mL polytetrafluoroethylene liner, react at 150°C for 36 hours, and then wash three times with glacial acetic acid, absolute ethanol, and deionized water;

[0049] F. Dry the centrifuged product in an oven at 60-80°C for 12 hours.

[0050] Ag-SrTiO prepared by the present invention 3 Nanomaterials (S1).

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Abstract

The invention belongs to the technical field of inorganic nanometer material and environment material preparation, and relates to a novel Ag-SrTiO3 nanometer material as well as a preparation method and application thereof. According to the nanometer material, an Ag<+> doped SrTiO3 photocatalyst is successfully prepared by a one-step hydrothermal synthesis method; under the visible light irradiation, the TC is subjected to photodegradation. Experiments find that the Ag<+> doping quantity is 1.5 to 5 weight percent. Photocatalysis experiments show that the prepared Ag-SrTiO3 photocatalyst has ahigh effect in the TC degradation rate aspect. Through the comparation with pure SrTiO3 under the visible light irradiation, particularly the doping quantity of an Ag-SrTiO3 sample is 3 percent, high-efficiency TC degradation rate (79.63 percent) is shown in 120min. The response range of the SrTiO3 photocatalyst is expanded by Ag<+> doping, so that the visible light response is effectively realized. The invention aims at providing a semiconductor material with simple process and shape being the spherical nanometer structure; the advantages of good chemical stability and the like are realized;a good photodegradation effect is achieved on TC wastewater. The catalyst has the advantages that the preparation process is simple; the photocatalytic activity is high, and the like.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials and environmental materials and their degradation of environmental pollutants, and relates to a one-step hydrothermal Ag + doped SrTiO 3 Nanomaterials and their preparation methods and applications. Background technique: [0002] In recent years, water safety issues have attracted widespread attention from all over the world. With the continuous development of the medical industry, the negative impact of pharmaceutical wastewater on the environment has become more and more serious. Antibiotics have been around for a long time in the environment. Most of the wastewater produced in the antibiotic pharmaceutical process contains high concentrations of active antibiotics, which can inhibit the growth of microorganisms in water treatment, interfere with the endocrine of aquatic species, promote the production of drug-resistant genes, and the discontinuity of wast...

Claims

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Application Information

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IPC IPC(8): B01J23/58C02F1/30C02F101/30
CPCC02F1/30B01J23/002B01J23/58C02F2101/30C02F2305/10B01J2523/00B01J35/39B01J2523/47B01J2523/24B01J2523/18
Inventor 曹丽丽王利平彭慧汪楚乔蒋善庆
Owner CHANGZHOU UNIV
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