Floral Beta-Bi2O3@CoO heterojunction photocatalyst, preparation method and application thereof

A photocatalyst, -bi2o3 technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the limitation of photocatalytic technology, it is difficult to use visible light parts, etc. problem, to achieve the effect of rich porous structure, outstanding redox ability, good stability and reusability

Active Publication Date: 2019-06-28
沈阳宏坤电气设备有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of photocatalytic technology is limited due to the fact that wide bandgap semiconductor materials are difficu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Floral Beta-Bi2O3@CoO heterojunction photocatalyst, preparation method and application thereof
  • Floral Beta-Bi2O3@CoO heterojunction photocatalyst, preparation method and application thereof
  • Floral Beta-Bi2O3@CoO heterojunction photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Flower-shaped β-Bi 2 o 3 Preparation of @CoO Heterojunction Photocatalyst

[0034] 1.25g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10 mL of acetic acid, and then 12.5 mL of ethanol was added to form a white suspension. After stirring for 45min, add 25mL of N,N-dimethylformamide and continue stirring until the solution is clear. Transfer to a 100 mL Teflon-lined autoclave and keep at 100 °C for 40 min. After cooling to room temperature, the collected white powder samples were washed with water and ethanol, and dried in an oven at 80 °C. The obtained white precursor was heated in a muffle furnace at 2°C / min to 350°C for 4h to obtain β-Bi 2 o 3 powder.

[0035] 0.5g β-Bi 2 o 3 Disperse in 20mL deionized water, add 0.083g Co(CH 3 COO) 2 4H 2O, and continued to stir for 24h. Subsequently, the mixture was evaporated to dryness at 60°C. in N 2 Under protection, the temperature was raised to 350°C at 2°C / min and calcined for 2 hours to obtain β-Bi 2 o 3 @CoO c...

Embodiment 2

[0045] (1) Degradation of organic pollutants under visible light irradiation

[0046] The β-Bi prepared by 20mg embodiment 1 2 o 3 @CoO was dispersed in 50mL of 10mg / L TC, CTC or OTC aqueous solution. Before light exposure, the suspension was magnetically stirred for 30 min in the dark to achieve adsorption-desorption equilibrium. Subsequently, irradiate the suspension with a 300W xenon lamp (λ≥420nm), collect 5mL of the suspension every 20min, centrifuge to remove the catalyst, measure the concentration with a UV-Vis spectrophotometer, and calculate the degradation rate, the result is as follows Figure 7a , Figure 7b and Figure 7c .

[0047] Under visible light irradiation, the prepared β-Bi was evaluated by catalytic degradation of TC, CTC, OTC in aqueous solution, respectively 2 o 3 Photocatalytic activity of @CoO composites. Figure 7a As shown, after 60min, β-Bi 2 o 3 The degradation efficiency of TC by @CoO is about 86%, while β-Bi 2 o 3 The degradation ra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

This invention discloses floral Beta-Bi2O3@CoO heterojunction photocatalyst, a preparation method and application thereof. The Beta-Bi2O3 is dispersed in deionized water. After 20 min stirring, Co (CH3COO) 24H2O is added, and then the mixture is continuously stirred for 24h and is evaporated at 60 oC. Under the protection of N2, the product is calcined at 350oC for 2h, and the floral Beta-Bi2O3@CoO heterojunction photocatalyst is obtained. The floral Beta-Bi2O3@CoO heterojunction photocatalyst successfully loads p-type semiconductor CoO nanoparticles on three-dimensional floral Beta-Bi2O3 of n-type semiconductors to form a stable p-n junction. The composite has large specific surface area, super high visible light absorption capacity, enhanced electron-hole pair separation efficiency, andshows excellent visible light catalytic performance. Under visible light irradiation, the constructed Beta-Bi2O3@CoO heterojunction material shows a good degradation effect on TC/CTC/OTC.

Description

technical field [0001] The invention belongs to the field of photocatalysts, in particular to a flower-like β-Bi with a Z-type p-n junction structure 2 o 3 @CoO photocatalyst and its application in photocatalytic degradation of organic pollutants. Background technique [0002] With the widespread application of antibiotics in medical treatment, animal husbandry, and aquaculture, a large amount of antibiotic-containing wastewater or antibiotics that have not been metabolized by organisms enter the environmental water body through excrement, which not only causes harm to aquatic organisms, but also enters with the food chain. human body and pose a threat to human health. [0003] Tetracycline antibiotics (TCs) are a class of broad-spectrum antibiotics, including tetracycline (tetracycline, TC), chlortetracycline (chlotetracycline, CTC) and oxytetracycline (oxytetracycline, OTC), etc., widely used in medical and animal husbandry . It is reported that a large part of antibio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J23/843C02F1/30C02F101/38
Inventor 刘雪岩张蕾杨真
Owner 沈阳宏坤电气设备有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap