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Preparation method of CdSe/CdS core-shell structured quantum dot photocatalyst and application thereof

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: 2014-02-26
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 of CdSe/CdS core-shell structured quantum dot photocatalyst and application thereof
  • Preparation method of CdSe/CdS core-shell structured quantum dot photocatalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of CdSe quantum dots:

[0025] Add 0.0592g Se powder to 20mL1.2mol / L Na 2 SO 3 Magnetic stirring in the solution was heated to boiling to obtain Na 2 SeSO 3 solution; 0.0913g CdCl 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.

[0026] (2) Preparation of CdSeCdS core-shell quantum dot photocatalyst:

[0027] Weigh 0.0913g CdCl 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.

[002...

Embodiment 2

[0030] (1) Preparation of CdSe quantum dots:

[0031] 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.

[0032] (2) Preparation of CdSeCdS core-shell quantum dot photocatalyst:

[0033] Weigh 0.0913g CdCl2 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.

[0034] (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 tetracyc...

Embodiment 3

[0036] (1) Preparation of CdSe quantum dots:

[0037] 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.

[0038] (2) Preparation of CdSeCdS core-shell quantum dot photocatalyst:

[0039] Weigh 0.0913g CdCl 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.

[0040] (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 tetracy...

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Abstract

The invention relates to a preparation method of a CdSe / CdS core-shell structured quantum dot photocatalyst, comprising the following steps: firstly, preparing CdSe quantum dot, adding selenium powder into a Na2SO3 solution and carrying out magnetic stirring to obtain a Na2SeSO3 solution; then, adding CdCl2 and thiomalic acid into deionized water and mixing, adjusting pH of the solution by the use of NaOH, adding the newly-prepared Na2SeSO3 solution under the protection of nitrogen, heating with oil bath to 100 DEG C, refluxing, and cooling to room temperature; preparing a CdSe / CdS core-shell structured quantum dot photocatalyst, weighing CdCl2, dissolving CdCl2 and adding it into the above prepared solution, and stirring; and finally adding a certain amount of sodium hyposulfite and stirring, refluxing at 100 DEG C for 1-4 hours, cooling to room temperature, centrifuging, and drying to obtain the CdSe / CdS core-shell structured quantum dot photocatalyst, wherein the mole ratio of CdSe to 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 chlortetracycline, which play a role in promoting the growth of livestock and poultry and improving feed remuneration. , disease prevention and other aspects play an important role. 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 antibi...

Claims

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Application Information

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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
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