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

Z-mechanism Bi2O3@CeO2 photocatalyst rich in oxygen vacancy, and preparation method and application thereof

A photocatalyst, oxygen vacancy technology, applied in the field of photocatalysis, can solve the problems of high photo-generated electron-hole recombination rate and low utilization rate of photocatalyst, achieve high catalytic degradation activity, fast degradation rate, improve electrical conductivity and oxidation effect of ability

Active Publication Date: 2019-08-16
SHAANXI NORMAL UNIV
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, β-Bi 2 o 3 Photocatalysts have a high photogenerated electron-hole recombination rate, resulting in a low utilization rate, which is not enough for better application in the field of photocatalysis

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
  • Z-mechanism Bi2O3@CeO2 photocatalyst rich in oxygen vacancy, and preparation method and application thereof
  • Z-mechanism Bi2O3@CeO2 photocatalyst rich in oxygen vacancy, and preparation method and application thereof
  • Z-mechanism Bi2O3@CeO2 photocatalyst rich in oxygen vacancy, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Oxygen vacancy-rich Z-mechanism Bi 2 o 3 @CeO 2 The preparation method of photocatalyst, it comprises the steps:

[0033] 1) Preparation of reaction solution

[0034] a. Dissolve 2 g of cerium nitrate hexahydrate in 60 mL of deionized water to form a uniform solution, then add 0.8 g of acrylamide and 1.8 g of glucose and stir for 20 minutes to prepare a cerium nitrate solution;

[0035] b. Bi(NO 3 ) 3 ·5H 2 O was dissolved in ethylene glycol solution and stirred for 20 minutes until the solution was uniform to prepare bismuth nitrate solution;

[0036] 2) Slowly drop the bismuth nitrate solution prepared in step 2) into the cerium nitrate solution prepared in step 1) according to the atomic ratio of Ce:Bi=1:0.04 and stir for 20 minutes, and use ammonia with a volume concentration of 5%. The pH of the aqueous solution was adjusted to 10, stirred for another 3 hours, and then transferred into a stainless steel reaction kettle for hydrothermal reaction at 180° C. fo...

Embodiment 2

[0042] Different from Example 1, the oxygen-vacancy-rich Z-mechanism Bi prepared in this example 2 o 3 @CeO 2 The preparation method of photocatalyst comprises the following steps:

[0043] 1) Preparation of reaction solution

[0044] a. Dissolve 2.5 g of cerium nitrate hexahydrate in 50 mL of deionized water to form a uniform solution, then add 1 g of acrylamide and 1.6 g of glucose and stir for 28 minutes to prepare a cerium nitrate solution;

[0045] b. Bi(NO 3 ) 3 ·5H 2 O was dissolved in ethylene glycol solution and stirred for 26 minutes until the solution was uniform to prepare bismuth nitrate solution;

[0046] 2) Slowly drop the bismuth nitrate solution prepared in step 2) into the cerium nitrate solution prepared in step 1) according to the atomic ratio of Ce:Bi=1:0.04 and stir for 26 minutes, and use ammonia with a volume concentration of 7% The pH of the aqueous solution was adjusted to 10, and then stirred for 2.5 hours, then transferred into a stainless st...

Embodiment 3

[0051] Different from Example 1 and Example 2, the oxygen-vacancy-rich Z-mechanism Bi prepared in this example 2 o 3 @CeO 2 The preparation method of photocatalyst comprises the following steps:

[0052] 1) Preparation of reaction solution

[0053] a. Dissolve 3 g of cerium nitrate hexahydrate in 60 mL of deionized water to form a uniform solution, then add 1.2 g of acrylamide and 2 g of glucose and stir for 30 minutes to prepare a cerium nitrate solution;

[0054] b. Bi(NO 3 ) 3 ·5H 2 O was dissolved in ethylene glycol solution and stirred for 30 minutes until the solution was uniform to prepare bismuth nitrate solution;

[0055] 2) Slowly drop the bismuth nitrate solution prepared in step 2) into the cerium nitrate solution prepared in step 1) according to the atomic ratio of Ce:Bi=1:0.05 and stir for 30 minutes, and use ammonia with a volume concentration of 5.5%. The pH of the aqueous solution was adjusted to 11, stirred for another 3 hours, and then transferred int...

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
Thicknessaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a Z-mechanism Bi2O3@CeO2 photocatalyst rich in oxygen vacancy, a preparation method and application of same, and belongs to the technical field of photocatalysis. The method comprises the following steps: 1) preparing a reaction solution; 2) preparing a catalyst precursor solution; 3) under the protection of N2, calcining the precursor solution in a tubular furnace at a hightemperature to prepare an intermediate Bi@CeO2; and 4) preparing the Z-mechanism Bi2O3@CeO2 photocatalyst rich in oxygen vacancy. The catalyst is of a globular flower shaped structure by attaching nanosheet-shaped Bi2O3 to globular flower shaped CeO2 particles. The photocatalyst can be applied to degradation of NOx in air under the condition of visible light, is high in degradation rate and longin activity retention time, and the yield of an intermediate product NO2 is low. Products formed by degradation are low in toxicity or non-toxic, so that secondary pollution to the air is avoided.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a Z-mechanism Bi that is rich in oxygen vacancies 2 o 3 @CeO 2 Photocatalyst and its preparation method and application. Background technique [0002] Atmospheric Pollutants SOx, Nox and CO 2 Degradation of phospholipids has always been a matter of concern to people, because they not only bring huge challenges to the environment, but also seriously endanger human health and pose a huge challenge to future economic development. Photocatalytic oxidation technology is one of the efficient and green ways to degrade pollutants, usually with TiO 2 ,CeO 2 ,ZnO,WO 3 Such semiconductors are used as photocatalysts, but these photocatalysts have poor electrical conductivity and weak oxidation ability due to their weak photoresponsive ability and low carrier separation and transfer efficiency. [0003] CeO 2 As a traditional photocatalyst, because of its high efficiency, non-t...

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): B01J23/18B01D53/86B01D53/56B01J35/08B01J35/10
CPCB01J23/002B01J23/18B01D53/8628B01J35/40B01J35/51B01J35/615B01J35/39
Inventor 孙辉聂俊丽朱刚强
Owner SHAANXI NORMAL 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