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

Nano polyhedral ferric vanadate film photoelectrode with visible light response and preparation method and application thereof

A technology of thin film electrodes and polyhedrons, which is applied in the field of nano-polyhedral iron vanadate thin film photoelectrodes and its preparation, can solve the problems of unfavorable electron/hole pair separation and interface charge transport, poor charge transport ability, and small space charge density. Achieve excellent photocatalytic performance, high degradation rate, uniform dispersion of nanostructures

Active Publication Date: 2021-09-03
NANHUA UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing FeVO 4 The preparation methods mainly include drop coating method, spray pyrolysis method and sol-gel method, but the FeVO prepared by these methods 4 These disordered nanostructures are not conducive to the separation of electron / hole pairs and interfacial charge transport, resulting in FeVO 4 The poor overall charge transport ability and small space charge density of FeVO greatly limit the 4 Applications in the field of photoelectrocatalysis

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
  • Nano polyhedral ferric vanadate film photoelectrode with visible light response and preparation method and application thereof
  • Nano polyhedral ferric vanadate film photoelectrode with visible light response and preparation method and application thereof
  • Nano polyhedral ferric vanadate film photoelectrode with visible light response and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The invention provides a method for preparing a nano-polyhedron iron vanadate film photoelectrode responsive to visible light, comprising the following steps:

[0036] (1) Iron salt is mixed with alkali metal nitrate, water and acid to obtain a mixed solution;

[0037] (2) carrying out the hydrothermal reaction with the mixed solution obtained in the step (1) to obtain the FeOOH film electrode;

[0038] (3) coating the vanadium source solution on the FeOOH film electrode obtained in the step (2) and performing heat treatment to obtain a nano-polyhedron iron vanadate film photoelectrode.

[0039] Such as figure 1 As shown, the flow process of the preparation method of the nano-polyhedral iron vanadate thin film photoelectrode of the visible light response provided by the present invention is to first prepare the FeOOH nanorod array film, then coat the vanadium source solution and carry out heat treatment to obtain iron vanadate and vanadium pentoxide, After being washe...

Embodiment 1

[0080] (1) 75mmol FeCl 3 ·6H 2 O and 0.5mol sodium nitrate were dissolved in 70mL of deionized water, and hydrochloric acid was added dropwise to adjust the pH to 1.5 to obtain a mixed solution (FeCl 3 ·6H 2 The ratio of the amount of O and sodium nitrate is 0.15:1, FeCl 3 ·6H 2 The volume ratio of the amount of O substance to deionized water is 7.5mmol: 7mL);

[0081] (2) Transfer the mixed solution obtained from the step (1) to the reaction kettle with the conductive side of the cleaned 3cm×3cm FTO conductive glass facing down, and conduct a hydrothermal reaction at 100°C for 6h, cool to room temperature naturally, and wash with water And dry, obtain FeOOH film electrode;

[0082] (3) The dimethyl sulfoxide solution of 0.18mL 0.1mol / L vanadium acetylacetonate is uniformly drip-coated on the FeOOH film electrode (the ratio of the surface area of ​​the dimethyl sulfoxide solution of vanadium acetylacetonate to the FTO conductive glass is 0.02mL : 1cm 2 ), dried on a fla...

Embodiment 2

[0094] (1) 75mmol FeCl 3 ·6H 2 O and 0.5mol sodium nitrate were dissolved in 70mL of deionized water, and hydrochloric acid was added dropwise to adjust the pH to 1.5 to obtain a mixed solution (FeCl 3 ·6H 2 The ratio of the amount of O and sodium nitrate is 0.15:1, FeCl 3 ·6H 2 The volume ratio of the amount of O substance to deionized water is 7.5mmol: 7mL);

[0095] (2) Transfer the mixed solution obtained from the step (1) to the reaction kettle with the conductive side of the cleaned 3cm×3cm FTO conductive glass facing down, and conduct a hydrothermal reaction at 100°C for 1 hour, cool to room temperature naturally, and wash with water And dry, obtain FeOOH film electrode;

[0096] (3) The dimethyl sulfoxide solution of the vanadium acetylacetonate of 0.01mol / L is uniformly drip-coated on the FeOOH film electrode (the ratio of the volume of the dimethyl sulfoxide solution of vanadium acetylacetonate to the surface area of ​​the FTO conductive glass is 0.01mL: 1cm 2...

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
Thicknessaaaaaaaaaa
Lengthaaaaaaaaaa
The average diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a nano polyhedral ferric vanadate film photoelectrode with visible light response and a preparation method and application thereof, and belongs to the technical field of photoelectric materials.The preparation method comprises the steps: making ferric salt, alkali metal nitrate, water and acid mixed and then subjected to a hydrothermal reaction with a matrix to obtain a FeOOH film electrode; and coating the vanadium source solution on the FeOOH film electrode for heat treatment to obtain the nano polyhedral ferric vanadate film photoelectrode. The ferric vanadate film photoelectrode prepared by the method has an ordered polyhedral nanostructure, and the nanostructure is relatively uniform in dispersion, high in purity and excellent in photoelectrocatalysis performance. Results of the embodiment show that the prepared nano polyhedral ferric vanadate film photoelectrode has response to light with the wavelength being 610 nm or below, the photoelectric conversion efficiency under illumination with the wavelength being 400 nm reaches up to 12%, the nano polyhedral ferric vanadate film photoelectrode has the high degradation rate on various organic matter, and the degradation efficiency of methyl orange, Congo red and rhodamine B exceeds 95%.

Description

technical field [0001] The invention relates to the technical field of photoelectric materials, in particular to a nano-polyhedron iron vanadate film photoelectrode responsive to visible light, a preparation method and application thereof. Background technique [0002] Photocatalytic water splitting to produce hydrogen and degrade organic matter based on visible light excitation is a promising technology. As the core part of photocatalysis, the performance of photocatalytic electrode directly affects the effect of photocatalytic system, therefore, it is of great significance to prepare photoelectrode materials with high photoelectrocatalytic (PEC) performance. [0003] At present, it is generally believed that the characteristics that an excellent semiconductor photocatalytic electrode should have are: good visible light absorption performance, orderly nanocrystal structure, stability in aqueous solution, non-toxic, easy to prepare and cheap. Among the existing photocatalyt...

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): B01J23/847C25B1/04C25B1/55C25B11/087C25B11/077C25B11/052C02F1/30C02F101/34C02F101/38
CPCB01J23/8472C25B1/04C25B1/55C25B11/087C25B11/077C25B11/052C02F1/30C02F2101/38C02F2101/40C02F2101/34C02F2305/10B01J35/33B01J35/39Y02W10/37
Inventor 曾庆意傅喜军刘永王玉梅高贝贝曹瑜寒杨柳
Owner NANHUA 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