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

Composite photoanode and preparation method thereof

A technology of composite materials and photoanodes, which is applied in the fields of nanomaterials, semiconductor materials and electrochemistry, can solve problems affecting photoelectric performance and poor conductivity, and achieve the effects of enhancing photoelectric performance, improving photoelectric performance, and improving conductivity

Inactive Publication Date: 2019-08-02
SOUTHEAST UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electron-hole pairs generated by it under light are easy to recombine, and its conductivity is poor, which affects its photoelectric performance.

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
  • Composite photoanode and preparation method thereof
  • Composite photoanode and preparation method thereof
  • Composite photoanode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 prepares α-Fe 2 o 3 Nanocrystalline

[0016] 1. Preparation of Fe(acac) by electrospinning 3 / PVP composite nanofiber

[0017] Take 0.6g of PVP with a molecular weight of 30000-40000 into a 20mL strain bottle, then put it into a magnet with a width of about 1.5cm, then add 4.5mL of ethanol solution, and stir on a magnetic stirrer. After stirring for 12 hours (or using the hot solution method, that is, heat and stir until a clear and transparent solution appears), add 5.25mL of glacial acetic acid to prevent Fe(acac) 3 Hydrolyze, continue to stir until the solution is uniform, then add 1.2g of Fe(acac) 3 Just mix well. Inject the evenly stirred liquid into a 5mL syringe, then fix the syringe in a large electrospinning machine, cover the bottom of the syringe with tin foil as a receiver, set the voltage to 17.5kV, flow rate to 3mL / h, and adjust the humidity to below 40%.

[0018] 2. α-Fe 2 o 3 Preparation of nanocrystals:

[0019] Take 16mg Fe(acac)...

Embodiment 2

[0020] Example 2 Preparation of α-Fe with GO doping amount of 1% 2 o 3 / RGO Composite Nanomaterials

[0021] 1. Preparation of Fe(acac) by electrospinning 3 / PVP composite nanofiber:

[0022] Take 0.6g of PVP with a molecular weight of 30000-40000 into a 20mL strain bottle, then put it into a magnet with a width of about 1.5cm, then add 4.5mL of ethanol solution, and stir on a magnetic stirrer. After stirring for 12 hours (or using the hot solution method, that is, heat and stir until a clear and transparent solution appears), add 5.25mL of glacial acetic acid to prevent Fe(acac) 3 Hydrolyze, continue to stir until the solution is uniform, then add 1.2g of Fe(acac) 3 Just mix well. Inject the evenly stirred liquid into a 5mL syringe, then fix the syringe in a large electrospinning machine, cover the bottom of the syringe with tin foil as a receiver, set the voltage to 17.5kV, flow rate to 3mL / h, and adjust the humidity to below 40%.

[0023] 2. Improved Hummers method t...

Embodiment 3

[0032] Example 3 Preparation of α-Fe with GO doping amount of 5% 2 o 3 / RGO Composite Nanomaterials

[0033] 1. Preparation of Fe(acac) by electrospinning 3 / PVP composite nanofiber:

[0034] Take 0.6g of PVP with a molecular weight of 30000-40000 into a 20mL strain bottle, then put it into a magnet with a width of about 1.5cm, then add 4.5mL of ethanol solution, and stir on a magnetic stirrer. After stirring for 12 hours (or using the hot solution method, that is, heat and stir until a clear and transparent solution appears), add 5.25mL of glacial acetic acid to prevent Fe(acac) 3 Hydrolyze, continue to stir until the solution is uniform, then add 1.2g of Fe(acac) 3 Just mix well. Inject the evenly stirred liquid into a 5mL syringe, then fix the syringe in a large electrospinning machine, cover the bottom of the syringe with tin foil as a receiver, set the voltage to 17.5kV, flow rate to 3mL / h, and adjust the humidity to below 40%.

[0035] 2. α-Fe 2 o 3 Preparation ...

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 composite photoanode and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing composite nanofibers by electrostatic spinning; then, preparing alpha-Fe2O3 nanocrystals with specific morphology in ammonia water by a hydrothermal method; adding GO in a hydrothermal process under alkaline conditions, so that the GO is compounded with the alpha-Fe2O3 nanocrystals to prepare alpha-Fe2O3 / RGO; and preparing pure Fe2O3 nanocrystals and alpha-Fe2O3 / RGO composite nanomaterials into a photoanode, wherein the photoelectric performance evaluation is completed by utilizing a light source electrochemical workstation; and the optimal proportion is found out by changing the doping amount of the alpha-Fe2O3 / RGO composite nanomaterials.

Description

technical field [0001] The invention belongs to the fields of nanometer materials, semiconductor materials and electrochemistry, and specifically relates to a composite material photoanode and a preparation method thereof. Background technique [0002] α-Fe 2 o 3 With many excellent properties, it has great application potential in photovoltaic conversion and photocatalysis, but it still has some shortcomings. First of all, the excited-state electrons and holes generated under light have a short lifetime of only 10-12ps, which leads to a short hole diffusion distance of about 2-4nm, so the generated electron-hole pairs are very easy to recombine. The density of the current generated under the light is reduced; and due to the α-Fe 2 o 3 Its own poor conductivity makes the mobility of carriers lower, so that the generated electrons or holes cannot be conducted out in time and recombined, making it difficult to quickly carry out the reaction of electrolyzing water. Therefo...

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): C25B1/04C25B11/04H01G9/20D01D5/00
CPCC25B1/04C25B11/091D01D5/003D01D5/0061H01G9/2027Y02E10/542Y02E60/36
Inventor 代云茜刘垦符婉琳赵经武武亚南田计兰孙岳明
Owner SOUTHEAST 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