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Preparation and application of metal ion doped CdSe quantum dot photocatalyst

A technology of metal ions and photocatalysts, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of reducing the stability of quantum dots, photocatalytic performance suppression, etc., and achieve green environmental protection treatment technology , easy operation and efficient treatment technology

Inactive Publication Date: 2014-04-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the photocorrosion phenomenon of quantum dots, its photocatalytic performance is severely inhibited, and the stability of quantum dots is greatly reduced.

Method used

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  • Preparation and application of metal ion doped CdSe quantum dot photocatalyst
  • Preparation and application of metal ion doped CdSe quantum dot photocatalyst
  • Preparation and application of metal ion doped CdSe quantum dot photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of NaHSe precursor solution:

[0026] Weigh 0.00075 mol of Se powder and 0.005 mol of NaHB into a glass reaction bottle, add deionized water, and magnetically stir to assist the reaction. 2 Protect until the white precipitate appears in the reaction, draw the supernatant liquid with a syringe, which is the NaHSe precursor.

[0027] (2) Preparation of metal ion doped CdSe quantum dot photocatalyst:

[0028] Weigh 0.09134g cadmium chloride (CdCl 2 2.5H 2 O), 0.004g cobalt chloride (CoCl 2 ·6H 2 0) Put into a small beaker, add deionized water and stir until completely dissolved, then add 0.069g of 3-mercaptopropionic acid and mix well, then adjust the pH=9 of the solution with 1mol / L sodium hydroxide solution, then prepare the NaHSe precursor solution Inject into the above solution with a syringe and stir. After 15 minutes of purging nitrogen to remove oxygen, the solution will appear flocculent precipitation, pour it into a 50mL autoclave and heat it ...

Embodiment 2

[0031] (1) Preparation of NaHSe precursor solution:

[0032] Weigh 0.00075 mol of Se powder and 0.01 mol of NaHB into a glass reaction bottle, add deionized water, and magnetic stirring assists the reaction. 2 Protect until the white precipitate appears in the reaction, draw the supernatant liquid with a syringe, which is the NaHSe precursor.

[0033] (2) Preparation of metal ion doped CdSe quantum dot photocatalyst:

[0034] Weigh 0.09134g cadmium chloride (CdCl 2 2.5H 2 O), 0.004g cobalt chloride (CoCl 2 ·6H 2 0) Put into a small beaker, add deionized water and stir until completely dissolved, then add 0.069g of 3-mercaptopropionic acid after fully mixing, adjust the pH=9 of the solution with 1mol / L sodium hydroxide solution, then prepare the NaHSe precursor solution Inject into the above solution with a syringe and stir. After 15 minutes of purging nitrogen to remove oxygen, the solution will appear flocculent precipitation, pour it into a 50mL autoclave and heat it in...

Embodiment 3

[0037] (1) Preparation of NaHSe precursor solution:

[0038]Weigh 0.00075 mol of Se powder and 0.0015 mol of NaHB into a glass reaction bottle, add deionized water, and magnetic stirring assists the reaction. 2 Protect until the white precipitate appears in the reaction, draw the supernatant liquid with a syringe, which is the NaHSe precursor.

[0039] (2) Preparation of metal ion doped CdSe quantum dot photocatalyst:

[0040] Weigh 0.09134g cadmium chloride (CdCl 2 2.5H 2 O), 0.004g cobalt chloride (CoCl 2 ·6H 2 0) Put into a small beaker, add deionized water and stir until completely dissolved, then add 0.069g of 3-mercaptopropionic acid and mix well, then adjust the pH=9 of the solution with 1mol / L sodium hydroxide solution, then prepare the NaHSe precursor solution Inject into the above solution with a syringe and stir. After 15 minutes of purging nitrogen to remove oxygen, the solution will appear flocculent precipitation, pour it into a 50mL autoclave and heat it in...

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Abstract

The invention relates to preparation and application of a metal ion doped CdSe quantum dot photocatalyst, and belongs to the technical field of environmental material preparation. The preparation of the metal ion doped CdSe quantum dot photocatalyst comprises the following steps: (1) preparation of an NaHSe precursor solution, namely putting Se powder and sodium borohydride into a glass reaction bottle, adding deionized water, and carrying out magnetic stirring reaction; and (2) preparation of the metal ion doped CdSe quantum dot photocatalyst, namely adding cadmium chloride, metal ion chloride and stabilizing agents by taking deionized water as a solvent, adjusting the pH value of the solution after stirring fully, injecting an NaHSe precursor solution again, removing oxygen by introducing nitrogen, pouring into a high-pressure reaction kettle and heating after flocculent is generated in the solution, taking out, cooling naturally, centrifuging, washing, putting into a baking oven, and drying, thereby obtaining the metal ion doped CdSe quantum dot photocatalyst. According to the preparation disclosed by the invention, the aim of degrading antibiotic wastewater by taking the metal ion doped semiconductor quantum dots as the photocatalyst is reached.

Description

technical field [0001] The invention relates to a preparation method and application of a metal ion-doped CdSe quantum dot photocatalyst, and belongs to the technical field of environmental material preparation. Background technique [0002] Antibiotics are a class of chemicals produced by microorganisms that inhibit or kill other microorganisms at low concentrations. Currently widely used antibiotics can be divided into β-lactams, quinolones, tetracyclines, aminoglycosides, macrolides, sulfonamides, etc. according to their chemical structures. For a long time, antibiotics have been widely used in the treatment of human and animal diseases, and are added to animal feed in sub-therapeutic doses to prevent animal diseases and promote their growth. However, most antibiotics cannot be completely absorbed by the body. About 90% of antibiotics are excreted into the environment in the form of prototype or metabolites through the feces and urine of patients, livestock and poultry, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C02F1/30C02F1/72C02F1/58
CPCY02W10/37
Inventor 闫永胜马长畅刘馨琳汤艳峰冯梦遥周明君吴宇霆霍鹏伟
Owner JIANGSU UNIV
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