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

A method to enhance the photocatalytic performance of ferroelectric materials by regulating spontaneous polarization

A ferroelectric material and spontaneous polarization technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of lack of control means and achieve photocatalysis Effects of performance improvement and photocatalytic performance improvement

Active Publication Date: 2019-12-10
SHANGHAI RES INST OF MATERIALS CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the reports on regulating the spontaneous polarization of ferroelectric materials are limited to thin film materials and ceramic materials, and there are extremely few methods for regulating spontaneous polarization in powder materials.

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
  • A method to enhance the photocatalytic performance of ferroelectric materials by regulating spontaneous polarization
  • A method to enhance the photocatalytic performance of ferroelectric materials by regulating spontaneous polarization
  • A method to enhance the photocatalytic performance of ferroelectric materials by regulating spontaneous polarization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Bismuth tungstate (Bi 2 WO 6 ) to enhance the photocatalytic performance, specifically:

[0030] 1) Dissolving the soluble polymer material polymethyl methacrylate (PMMA) in ethyl acetate, the addition ratio is 0.5g PMMA dissolved in 10mL ethyl acetate solvent, stirring evenly on a magnetic stirrer to prepare a clear solution;

[0031] 2) Add 1g Bi directly to the above mixed solution 2 WO 6 Powder, mix the mixture evenly under continuous stirring;

[0032] 3) Take a small amount of the above mixed solution, and evenly drop it on the cleaned ITO conductive glass substrate, or spin-coat it on the conductive glass substrate through a coater to prepare an organic film with a thickness of less than 1mm;

[0033] 4) Transfer the above insulating film to an oven at 60°C for drying for more than 15 minutes, so that the ethyl acetate is fully volatilized, and a flat insulating film is prepared;

[0034] 5) Prepare another piece of the same material, whose size is slightly ...

Embodiment 2

[0039] Bismuth ferrite (BiFeO) controlled by an external electric field 3 ) to enhance the photocatalytic performance, specifically:

[0040] 1) Dissolving the soluble polymer material polymethyl methacrylate (PMMA) in ethyl acetate, the addition ratio is 0.5g PMMA dissolved in 10mL ethyl acetate solvent, stirring evenly on a magnetic stirrer to prepare a clear solution;

[0041] 2) Add 1g BiFeO directly to the above mixed solution 3 Powder, mix the mixture evenly under continuous stirring;

[0042] 3) Take a small amount of the above mixed solution, and evenly drop it on the cleaned ITO conductive glass substrate, or spin-coat it on the conductive glass substrate through a coater to prepare an organic film with a thickness of less than 1mm;

[0043] 4) Transfer the above insulating film to an oven at 60°C for drying for more than 15 minutes, so that the ethyl acetate is fully volatilized, and a flat insulating film is prepared;

[0044] 5) Prepare another piece of the same...

Embodiment 3

[0048] Tuning barium titanate (BaTiO) by applying an electric field 3 ) to enhance the photocatalytic performance, specifically:

[0049] 1) Dissolving the soluble polymer material polymethyl methacrylate (PMMA) in ethyl acetate, the addition ratio is 0.5g PMMA dissolved in 10mL ethyl acetate solvent, stirring evenly on a magnetic stirrer to prepare a clear solution;

[0050] 2) Add 1g BaTiO directly to the above mixed solution 3 Powder, mix the mixture evenly under continuous stirring;

[0051] 3) Take a small amount of the above mixed solution, and evenly drop it on the cleaned ITO conductive glass substrate, or spin-coat it on the conductive glass substrate through a coater to prepare an organic film with a thickness of less than 1mm;

[0052] 4) Transfer the above insulating film to an oven at 60°C for drying for more than 15 minutes, so that the ethyl acetate is fully volatilized, and a flat insulating film is prepared;

[0053] 5) Prepare another piece of the same mat...

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

The invention relates to a method for enhancing the photocatalytic performance of ferroelectric materials by regulating spontaneous polarization. A soluble polymer material is used to load ferroelectric material powder to prepare an insulating film. The spontaneous polarization intensity of the ferroelectric material is adjusted by applying an external electric field, so that Photogenerated electrons and holes are effectively separated under the action of the intrinsic polarization field, thereby extending the lifetime of photogenerated carriers and achieving the purpose of improving the photocatalytic performance of the material. Compared with the existing technology, the present invention provides a simple and effective way to enhance the photocatalytic performance of ferroelectric materials (especially ferroelectric powder materials).

Description

technical field [0001] The invention relates to a method for enhancing the photocatalytic performance of ferroelectric materials, in particular to a method for enhancing the photocatalytic performance of ferroelectric materials by regulating spontaneous polarization. Background technique [0002] Photocatalytic technology has great application prospects in the fields of environmental purification, photolysis of water to produce hydrogen, and dye-sensitized solar cells. However, the solar energy conversion efficiency of existing photocatalysts is still relatively low, mainly due to the rapid recombination of photogenerated electrons and holes and the low rate of surface redox reactions. The rate of surface redox reaction depends on the lifetime of photogenerated carriers. Since carrier separation, diffusion and surface redox reactions must be carried out within the lifetime of photogenerated carriers, the recombination of photogenerated electrons and holes is a photocatalytic...

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): B01J23/31B01J32/00B01J37/34C02F1/30C02F101/30
CPCC02F1/30B01J23/31B01J31/06B01J37/342C02F2101/308B01J35/39
Inventor 张刚华曾涛李精赵程付栖勇
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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