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Preparation method and application of cdsecds core-shell quantum dot photocatalyst

A photocatalyst, core-shell structure technology, applied in chemical instruments and methods, physical/chemical process catalysts, nano optics, etc., can solve problems such as antibiotic residues in aquaculture products, achieve green environmental protection treatment technology, high-efficiency treatment technology, and easy operation Effect

Active Publication Date: 2016-01-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the needs of the livestock and poultry breeding industry, the abuse of tetracycline drugs occurs from time to time, and the extensive use of antibiotics in the breeding industry eventually leads to antibiotic residues in farmed products

Method used

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  • Preparation method and application of cdsecds core-shell quantum dot photocatalyst
  • Preparation method and application of cdsecds core-shell quantum dot photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of CdSe quantum dots:

[0024] Add 0.0592g of Se powder to 20mL1.2mol / LNa 2 SO 3 Magnetic stirring in the solution was heated to boiling to obtain Na 2 SeSO 3 solution; 0.0913gCdCl 2 2.5H 2 O and 0.0975g of thiomalic acid were added to 20mL of deionized water and mixed, and the pH of the solution was adjusted to 7 with 1mol / L NaOH, and under the protection of nitrogen, new Na 2 SeSO 3 solution, the oil bath was heated to 100 o C, reflux for 1 hour, and cool to room temperature.

[0025] (2) Preparation of CdSeCdS core-shell quantum dot photocatalyst:

[0026] Weigh 0.0913gCdCl 2 2.5H 2 O was dissolved and added to the solution prepared in step (1), and stirred for 30 min. After adding 0.079g sodium thiosulfate and stirring for 30min, 100 o C was refluxed for 1 hour, cooled to room temperature, centrifuged, and dried to obtain a CdSeCdS core-shell structure quantum dot photocatalyst, wherein the molar ratio of CdSe to CdS was 1:1.

[0027] (3...

Embodiment 2

[0029] (1) Preparation of CdSe quantum dots:

[0030] According to the steps in Example 1, the difference is that the pH=8 of the solution is adjusted in step (1), and under the protection of nitrogen, the newly prepared Na 2 SeSO 3 solution, the oil bath was heated to 100 o C, reflux for 2 hours, and cool to room temperature.

[0031] (2) Preparation of CdSeCdS core-shell quantum dot photocatalyst:

[0032] Weigh 0.0913gCdCl 2 2.5H 2 O was dissolved and added to the solution prepared in step (1), and stirred for 30 min. After adding 0.079g sodium thiosulfate and stirring for 30min, 100 oC was refluxed for 1 hour, cooled to room temperature, centrifuged, and dried to obtain a CdSeCdS core-shell structure quantum dot photocatalyst, wherein the molar ratio of CdSe to CdS was 1:1.

[0033] (3) Take the sample in step (2) and carry out the photocatalytic degradation test in the photochemical reaction apparatus, and it is measured that the degradation rate of the tetracyclin...

Embodiment 3

[0035] (1) Preparation of CdSe quantum dots:

[0036] According to the steps in Example 1, the difference is that the pH=9 of the solution is adjusted in step (1), and under the protection of nitrogen, the newly prepared Na 2 SeSO 3 solution, the oil bath was heated to 100 o C, reflux for 3 hours, and cool to room temperature.

[0037] (2) Preparation of CdSeCdS core-shell quantum dot photocatalyst:

[0038] Weigh 0.0913gCdCl 2 2.5H 2 O was dissolved and added to the solution prepared in step (1), and stirred for 30 min. After adding 0.079g sodium thiosulfate and stirring for 30min, 100 o C was refluxed for 1 hour, cooled to room temperature, centrifuged, and dried to obtain a CdSeCdS core-shell structure quantum dot photocatalyst, wherein the molar ratio of CdSe to CdS was 1:1.

[0039] (3) Take the sample in step (2) and carry out the photocatalytic degradation test in the photochemical reaction instrument, and it is measured that the degradation rate of the tetracycl...

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Abstract

The invention relates to a preparation method of CdSeCdS core-shell structure quantum dot photocatalyst. First, CdSe quantum dots are prepared, and selenium powder is added to Na2SO3 solution for magnetic stirring to obtain Na2SeSO3 solution; then CdCl2 and thiomalic acid are added to deionized water and mixed. Finally, adjust the pH of the solution with NaOH, and under the protection of nitrogen, add the newly prepared Na2SeSO3 solution, heat the oil bath to 100oC, reflux, and cool to room temperature; then prepare CdSeCdS core-shell structure quantum dot photocatalyst, weigh CdCl2 and dissolve Add to the solution prepared above and stir. After adding a certain amount of sodium thiosulfate and stirring, reflux at 100°C for 1-4 hours, cool to room temperature, centrifuge, and dry to obtain a CdSeCdS core-shell structure quantum dot photocatalyst, wherein the molar ratio of CdSe and CdS is 1:(1-4 ).

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and relates to a preparation method and application of a cadmium selenide cadmium sulfide (CdSeCdS) core-shell structure quantum dot photocatalyst. Background technique [0002] Tetracycline Antibiotics (TCs) are a class of broad-spectrum antibiotics produced by Actinomycetes or semi-synthesized, mainly including tetracycline, oxytetracycline and aureomycin, which can promote the growth of livestock and poultry, improve feed remuneration, play an important role in disease prevention and control. Due to the needs of the livestock and poultry breeding industry, the abuse of tetracyclines occurs from time to time, and the extensive use of antibiotics in the breeding industry eventually leads to antibiotic residues in farmed products. Therefore, it brings potential harm to the health of humans and animals. Practice has proved that after antibiotics enter the body of humans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057C02F1/30B82Y20/00C02F101/38
Inventor 陈康敏蒋珍刘馨琳闫永胜姚冠新吕鹏马长畅
Owner JIANGSU UNIV