Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Amorphous bismuth oxide composite photocatalyst, preparation method and application method

A bismuth oxide, amorphous technology, applied in the field of photocatalyst preparation, can solve problems such as low NO degradation rate, and achieve the effects of increasing crystallinity, simple preparation and remarkable effect

Active Publication Date: 2019-05-28
CHONGQING TECH & BUSINESS UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention of this application is to provide an amorphous bismuth oxide composite photocatalyst, its preparation method and its use method, so as to solve the problem of low degradation rate of NO by existing photocatalysts

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
  • Amorphous bismuth oxide composite photocatalyst, preparation method and application method
  • Amorphous bismuth oxide composite photocatalyst, preparation method and application method
  • Amorphous bismuth oxide composite photocatalyst, preparation method and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] 6mol(NO 3 ) 3 ·5H 2 O was dissolved in 40 ml of bismuth solution with a volume ratio of ethanol and ethylene glycol of 1:1, and the mixture was heat-treated at a heating temperature of 160° C. and the heat treatment time was 3 hours to obtain an amorphous bismuth oxide solid. Disperse 1g of amorphous bismuth oxide in 30ml of distilled water at room temperature, add dropwise 30mL of 1mmol / L sodium borohydride solution, add 1g of PVP as a stabilizer, and react for 1h to obtain the product in a test tube for later use.

[0076] The amorphous bismuth oxide composite photocatalyst with a reducing agent concentration of 1 mmol / L prepared in the examples of this application degrades NO. The specific process is: at a relative humidity of 60%, an oxygen content of 21%, and a flow of NO gas flow of 3.3L / L min. Under the condition that the initial concentration of NO is 600μg / kg, 0.2g of the amorphous bismuth oxide composite photocatalyst prepared in the example is placed on a glass d...

Embodiment 2

[0078] 6mol(NO 3 ) 3 ·5H 2 O was dissolved in 40 ml of bismuth solution with a volume ratio of ethanol and ethylene glycol of 1:1, and the mixture was heat-treated at a heating temperature of 160° C. and the heat treatment time was 3 hours to obtain an amorphous bismuth oxide solid. Disperse 1g of amorphous bismuth oxide in 30ml of distilled water at room temperature, add dropwise 30mL of 3mmol / L sodium borohydride solution, add 1g of PVP as a stabilizer, react for 1h, and put the product in a test tube for later use.

[0079] Degradation of NO by the amorphous bismuth oxide composite photocatalyst prepared in the example of this application with a reducing agent concentration of 3 mmol / L is the same as that of Example 1 to calculate the degradation of NO by the amorphous bismuth oxide composite photocatalyst prepared in the example of this application The rate is 23.4%. It can be seen that bismuth element can activate the NO degradation rate of amorphous bismuth oxide, and the st...

Embodiment 3

[0081] 6mol(NO 3 ) 3 ·5H 2 O was dissolved in 40 ml of bismuth solution with a volume ratio of ethanol and ethylene glycol of 1:1, and the mixture was heat-treated at a heating temperature of 160° C. and the heat treatment time was 3 hours to obtain an amorphous bismuth oxide solid. Disperse 1g of amorphous bismuth oxide in 30ml of distilled water at room temperature, add 1g of PVP as a stabilizer, react for 1h, and add 30ml of 5mmol / L sodium borohydride solution dropwise to obtain the product and put it in a test tube for later use.

[0082] Degradation of NO by the amorphous bismuth oxide composite photocatalyst prepared in the example of this application with a reducing agent concentration of 5mmol / L is the same as that of Example 1 and calculated to obtain the degradation of NO by the amorphous bismuth oxide composite photocatalyst prepared in the example of this application The rate is 37.1%. It can be seen that bismuth element can activate the NO degradation rate of amorphou...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

This application discloses an amorphous bismuth oxide composite photocatalyst, a preparation method and a use method. The preparation method includes: dissolving a bismuth elemental precursor in a solvent to obtain a bismuth solution. The solvent includes: a volume ratio of 1:1 Ethanol and ethylene glycol; place the bismuth solution in a 160°C environment for heat treatment to obtain amorphous bismuth oxide; uniformly disperse the amorphous bismuth oxide in water to obtain a dispersant, and add it dropwise to the dispersant A reducing solvent is used to obtain a mixture solution; the mixture solution is reacted at room temperature and allowed to stand to obtain an amorphous bismuth oxide composite photocatalyst. Through experimental analysis, it can be seen that the amorphous bismuth oxide composite photocatalyst obtained by the preparation method shown in this application is decorated with in-situ reduced elemental bismuth on the surface of the amorphous bismuth oxide as a photoelectron capture center, which promotes the separation of photogenerated carriers and enhances visible light. The absorption capacity further activates the photocatalytic activity of amorphous bismuth oxide.

Description

Technical field [0001] This application relates to the technical field of photocatalyst preparation, and more specifically to an amorphous bismuth oxide composite photocatalyst, preparation method and use method Background technique [0002] With the advancement of human science and technology, industry has developed on a large scale, automobiles are becoming more and more popular, and a large amount of nitrogen oxides are discharged into the atmosphere. Nitrogen oxide is a pollutant that destroys the photochemical smog, acid rain, and ozone layer. Nitrogen oxide has become an air pollution problem that needs to be solved urgently in countries all over the world. The photocatalyst can cause the degradation reaction of nitrogen oxides under the action of photocatalysis to generate H 2 0, C0 2 , Salt, etc. to achieve harmlessness, thereby purifying the environment. [0003] Generally, the energy band of a semiconductor photocatalyst is discontinuous. There is a forbidden band betwee...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/18B01D53/86B01D53/56
CPCB01D53/007B01D53/8628B01J23/18B01D2259/802B01J35/39
Inventor 董帆李欣蔚崔雯孙艳娟
Owner CHONGQING TECH & BUSINESS UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com