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Preparation method and application of cauliflower-like cds nano-microsphere photocatalyst

A photocatalyst and nano-microsphere technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as limited applications, and achieve easy operation, high-efficiency treatment technology, and green environmental protection treatment technology Effect

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

AI Technical Summary

Problems solved by technology

Because of its excellent optical and electrical properties, it is widely used in various light-emitting devices, photovoltaic devices, optical detectors, photosensitive sensors, and photocatalysis. However, the photocorrosion of CdS itself limits its application.

Method used

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  • Preparation method and application of cauliflower-like cds nano-microsphere photocatalyst
  • Preparation method and application of cauliflower-like cds nano-microsphere photocatalyst
  • Preparation method and application of cauliflower-like cds nano-microsphere photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of cauliflower-like CdS microsphere photocatalyst:

[0025] Add deionized water into a small beaker, add cadmium chloride 1.542g after purging nitrogen to remove oxygen, stir until it is completely dissolved, adjust the pH of the solution to 7 with 1mol / L sodium hydroxide solution after stirring fully, and then dissolve 1.248g Sodium sulfide was added to the above solution, continue to pass nitrogen gas to remove oxygen for 15 minutes, pour it into a 50mL autoclave and heat for 2 hours, take it out and let it cool naturally, centrifuge the cooled solution, wash it and put it in a vacuum drying oven at 50°C for 6 hours drying to obtain a cauliflower-like CdS microsphere photocatalyst photocatalyst with a molar mass ratio of cadmium source to sulfur source of 1.29:1.

[0026] (2) Take 0.05 g of the sample in (1) and conduct a photocatalytic degradation test in a photochemical reaction apparatus. It is measured that the degradation rate of the photocatalyst...

Embodiment 2

[0028] (1) Add deionized water in a small beaker, add 1.542g of cadmium chloride after purging nitrogen to remove oxygen, stir until completely dissolved, after fully stirring, adjust the pH=7 of the solution with 1mol / L sodium hydroxide solution, then Add 0.811g of sodium sulfide to the above solution to keep the molar mass ratio of cadmium source and sulfur source at 1:0.5, continue to feed nitrogen to remove oxygen for 15 minutes, pour it into a 50mL autoclave and heat for 2 hours, take it out and let it cool naturally, and put the cooled solution Centrifuge, wash and dry in a vacuum drying oven at 50°C for 6 hours to obtain a cauliflower-shaped CdS microsphere photocatalyst with a molar mass ratio of cadmium source to sulfur source of 1:0.5.

[0029] (2) Take the sample in (1) and carry out the photocatalytic degradation test in a 0.05g photochemical reaction apparatus. It is measured that the degradation rate of the photocatalyst to 15mg / L oxytetracycline hydrochloride ant...

Embodiment 3

[0031] According to the steps in Example 1, the difference is that the ratio of cadmium source to sulfur source in (1) is 1:3 to prepare the catalyst, wherein 1.542g of cadmium chloride and 4.865g of sodium sulfide. After the reaction is finished, take it out to cool naturally, centrifuge the cooled solution, wash it and put it into a vacuum drying oven to dry to obtain a photocatalyst.

[0032] (2) Get 0.05g of the sample in (1) and carry out the photocatalytic degradation test in the photochemical reaction instrument, and the photocatalytic degradation rate of 15mg / L oxytetracycline hydrochloride antibiotics obtained reaches 30.22% within 60min,

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Abstract

The invention relates to a preparation method and application of a cauliflower-like CdS nanometer microsphere photocatalyst, belonging to the technical field of environmental material preparation. The invention includes the preparation of cauliflower-like CdS nano-microsphere photocatalyst, which is to add cadmium chloride and stabilizer to ionized water, adjust the pH value of the solution with sodium hydroxide after sufficient stirring, pass nitrogen to remove oxygen, and then take appropriate amount of sodium sulfide to dissolve in water. Then the above-prepared solution was passed through nitrogen to remove oxygen, and sodium sulfide was added until the solution changed from colorless to orange-yellow. microsphere photocatalyst. The cauliflower-like CdS nanometer microsphere photocatalyst obtained according to the preparation method of the invention can effectively utilize visible light to degrade oxytetracycline hydrochloride solution in antibiotic wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and relates to the hydrothermal synthesis of cauliflower-like CdS nanometer microsphere photocatalyst and its application. Background technique [0002] Antibiotics are chemical substances produced by certain microorganisms, animals and plants, substances that can inhibit the proliferation of microorganisms and other cells, and are widely used as drugs for treating various bacterial infections or inhibiting pathogenic microbial infections. Due to the irrational use of antibiotics, it has caused great harm to the environment. Taking oxytetracycline hydrochloride as an example, many research reports have shown that antibiotics have been widely oxidized in soil, surface water, groundwater, sediment, urban sewage and animal excreta. In the pond. Therefore, the elimination of environmental pollution caused by antibiotic residues in the environment and the safety of food cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J35/08B01J37/10C02F1/72C02F101/36
CPCY02W10/37
Inventor 闫永胜汤艳峰喻龙宝刘馨琳马长畅周明君霍鹏伟
Owner JIANGSU UNIV