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3D chrysanthemum-like Z type Bi2S3@CoO heterojunction composite catalyst as well as preparation method and application thereof

A composite catalyst and heterojunction technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of plant damage and human health, so as to improve the absorption capacity and improve the light intensity. Response range, photocatalytic performance, and high catalytic activity

Active Publication Date: 2018-11-23
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wastewater containing TCs not only has immeasurable damage to plants, but more importantly, it will feed back to the human body along the food chain, resulting in a large enrichment of antibiotics, which greatly damages human health.

Method used

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  • 3D chrysanthemum-like Z type Bi2S3@CoO heterojunction composite catalyst as well as preparation method and application thereof
  • 3D chrysanthemum-like Z type Bi2S3@CoO heterojunction composite catalyst as well as preparation method and application thereof
  • 3D chrysanthemum-like Z type Bi2S3@CoO heterojunction composite catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of CoO

[0035] Weigh 0.582g of cobalt nitrate hexahydrate, 0.600g of urea and 0.074g of ammonium fluoride, add them into 50mL of double distilled water, keep stirring for 30min, then transfer to a 100mL hydrothermal reaction kettle, 110℃ water Thermal reaction for 6 hours. After the reaction was completed, cool to room temperature, collect the reaction product by centrifugation, and wash repeatedly with twice distilled water until the pH is neutral. Finally, it was dried in an oven at 60° C. for 12 hours. The completely dried reaction product was moved to a tube furnace, fed with nitrogen, and calcined at 300° C. for 2 h to obtain CoO.

[0036] (2) 3D chrysanthemum-shaped Z-shaped Bi 2 S 3 Preparation of @CoO Heterojunction Composite Catalysts

[0037] Weigh 600mg of CoO and 58mg of Bi(NO 3 ) 3 , was added to 30 mL of double distilled water, and stirred continuously for 20 min. Then 20mL containing 43mg Na was added dropwise 2 S aqueous solutio...

Embodiment 2

[0045] (1) 3D chrysanthemum-shaped Z-shaped Bi with different mass ratios 2 S 3 Preparation of @CoO Heterojunction Composite Catalysts

[0046] In 600mgCoO, add 23mg, 58mg, 69mg, 92mg and 115mg of Bi(NO 3 ) 3 , add 30mL of double distilled water, and continue to stir for 20min. Then add 20mL containing 17mg, 43mg, 51mg, 68mg and 85mg Na 2 The aqueous solution of S was stirred and reacted for 30 min, and the reaction product was collected by centrifugation, and washed several times with twice distilled water until the pH was neutral. Finally, it was dried in an oven at 60° C. for 12 hours. The completely dried material was moved to a tube furnace, fed with nitrogen, and calcined at 250°C for 2 hours to obtain the mass ratio Bi 2 S 3 :CoO=2:100, 5:100, 6:100, 8:100 and 10:100 3D chrysanthemum-like Z-shaped Bi 2 S 3 @CoO heterojunction composite catalyst.

[0047] (2) Degradation of organic pollutants

[0048] Method: weigh 3D chrysanthemum-shaped Z-shaped Bi 2 S 3 A...

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Abstract

The invention relates to a 3D chrysanthemum-like Z type Bi2S3@CoO heterojunction composite catalyst as well as a preparation method and application thereof. The preparation method of the 3D chrysanthemum-like Z type Bi2S3@CoO heterojunction composite catalyst comprises the following steps: adding CoO and Bi(NO3)3 into redistilled water, continuously stirring, dropwise adding a Na2S aqueous solution, stirring and reacting, then centrifuging and taking a solid product, repeatedly washing the solid product with redistilled water until the solid product is neutral, drying the solid product, then putting the product into a tubular furnace, and calcining for 2 hours under 250 DEG C to obtain a target product. The degradation rate on tetracycline of Bi2S3@CoO can reach up to 90%, and the degradation rate on aureomycin of Bi2S3@CoO can reach over 70%; the preparation method is simple, convenient and efficient and is low in cost; the prepared composite material has the characteristics of narrowband gap, large specific surface area and high catalytic activity, is excellent in visible light absorption performance, excellent in stability, high in photoelectric efficiency and excellent in photoelectrocatalysis degradation effect on organic matters, and can be applied to the fields of photoelectrocatalysis degradation organic matters and sensors.

Description

technical field [0001] The present invention relates to visible light responsive 3D chrysanthemum-like Z-shaped Bi 2 S 3 @CoO heterojunction composite catalyst and its application in the degradation of organic pollutants are mainly aimed at wastewater from the pharmaceutical industry and belong to the field of water treatment. Background technique [0002] As a new type of wastewater treatment technology, photoelectrocatalysis has shown broad application prospects in the advanced treatment of organic wastewater. It has been widely concerned by researchers at home and abroad for its remarkable advantages of completely degrading organic pollutants. The photoelectric catalytic process has the unique advantages of almost no selectivity to the degradation of organic matter, can completely degrade organic pollutants, has no secondary pollution, simple equipment, low investment, and good effect. Photoelectric catalytic oxidation technology is a semiconductor catalyst that generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043C02F1/30C02F101/38
CPCC02F1/30B01J27/043C02F2101/38C02F2305/10B01J35/39
Inventor 李莹杨真胡言东张蕾
Owner LIAONING UNIVERSITY
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