Unlock instant, AI-driven research and patent intelligence for your innovation.

A bivo for photocatalytic oxygen evolution 4 -al 2 o 3 -ni 4 o 4 Composite film and preparation method thereof

A bivo4-al2o3-ni4o4, composite film technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problems of complex synthesis, dissociation, poor stability of photoanode, etc. , Improve stability and low cost

Active Publication Date: 2020-03-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The metal-organic cocatalysts currently reported are mainly cobalt-based compounds, but the synthesis of cobalt-based compounds is relatively complicated, and they are easily dissociated in water, making the modified photoanode less stable.

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 bivo for photocatalytic oxygen evolution <sub>4</sub> -al <sub>2</sub> o <sub>3</sub> -ni <sub>4</sub> o <sub>4</sub> Composite film and preparation method thereof
  • A bivo for photocatalytic oxygen evolution <sub>4</sub> -al <sub>2</sub> o <sub>3</sub> -ni <sub>4</sub> o <sub>4</sub> Composite film and preparation method thereof
  • A bivo for photocatalytic oxygen evolution <sub>4</sub> -al <sub>2</sub> o <sub>3</sub> -ni <sub>4</sub> o <sub>4</sub> Composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of BiVO 4 Seed layer: Dissolve 0.3638g of bismuth nitrate and 0.4384g of ethylenediaminetetraacetic acid in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare A solution; weigh 0.0877g of ammonium metavanadate Dissolve 0.1096g of ethylenediaminetetraacetic acid in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare B solution; mix A and B solutions, continue to stir and mix, and prepare the seed layer precursor , put the FTO conductive glass on the spin coater, take the seed layer precursor solution for spin coating, spin coating 3 times, and keep it at 500°C for 10 minutes after each spin coating, and finally put the spin coated FTO conductive glass on the Preparing the bismuth vanadate seed layer by incubating at 500°C for 2 hours in air atmosphere;

[0032] (2) Preparation of BiVO 4 Film: Disperse 0.1455g of bismuth nitrate and 0.1315g of ethylenediaminetetr...

Embodiment 2

[0036] (1) Preparation of BiVO 4 Seed layer: Dissolve 0.395g of bismuth nitrate and 0.438g of ethylenediaminetetraacetic acid in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare A solution; weigh 0.117g of partial vanadium Dissolve ammonium chloride and 0.141g of EDTA in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare B solution; mix A and B solutions, continue to stir and mix, and obtain a seed layer For the precursor solution, put the FTO conductive glass on a spin coater, take the seed layer precursor solution for spin coating, 10 drops each time, spin coating three times, and keep it at 500°C for 15 min after each spin coating, and finally The spin-coated FTO conductive glass was kept in air at 500°C for 1.5 hours to obtain a bismuth vanadate seed layer;

[0037] (2) Preparation of BiVO 4 Film: Dissolve 0.12g of bismuth nitrate and 0.132g of ethylenediaminetetraacetic acid ...

Embodiment 3

[0041] (1) Preparation of BiVO 4 Seed layer: Dissolve 0.3638g of bismuth nitrate and 0.4384g of ethylenediaminetetraacetic acid in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare A solution; weigh 0.0877g of ammonium metavanadate Dissolve 0.1096g of ethylenediaminetetraacetic acid in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare B solution; mix A and B solutions, continue to stir and mix, and prepare the seed layer precursor ;Put the FTO conductive glass on the spin coater, take the seed layer precursor solution for spin coating, spin coating 3 times, put it in 500°C for 10min after each spin coating, and finally put the FTO conductive glass after spin coating in the air In the atmosphere, heat preservation at 500°C for 2 hours to prepare a bismuth vanadate seed layer;

[0042] (2) Preparation of BiVO 4 Film: Disperse 0.1455g of bismuth nitrate and 0.1315g of ethylenediamine...

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
band gapaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a BiVO4-Al2O3-Ni4O4 composite film applied to photoelectric catalytic oxygen evolution and a preparation method of the BiVO4-Al2O3-Ni4O4 composite film. The composite film comprises a BiVO4 nanometer plate, Al2O3 and Ni4O4, wherein the Al2O3 and the Ni4O4 are sequentially and uniformly loaded on the BiVO4 nanometer plate; the preparation method comprises the following stepsof: preparing a BiVO4-Al2O3 composite film; subsequently preparing a mixed solution of methylene dichloride and ethanol; dissolving Ni4O4 cubane powder in the mixed solution; subsequently soaking theBiVO4-Al2O3 composite film into the mixed solution; and stewing for 6-12 hours to obtain the BiVO4-Al2O3-Ni4O4 composite film. The BiVO4-Al2O3-Ni4O4 composite film disclosed by the invention is highin stability; the take-off potential in oxygen evolution is low; the photocurrent density is large; and meanwhile the preparation method is simple, low in cost and high in operability.

Description

technical field [0001] The invention belongs to the field of composite thin films, in particular to a BiVO used for photoelectrocatalytic oxygen precipitation 4 -Al 2 o 3 -Ni 4 o 4 Composite film and method for its preparation. Background technique [0002] Since the 21st century, with the continuous progress of society, the demand for energy has become increasingly urgent, and traditional fossil energy will cause great pollution to the environment. Therefore, finding efficient and renewable clean energy is considered to be the key to solving the problem. As the main source of energy for the earth, solar energy can be said to be inexhaustible. How to utilize solar energy efficiently has attracted extensive attention of researchers. Among them, the use of metal oxide semiconductor thin film photoanodes to absorb solar energy and photocatalyze water splitting to generate hydrogen and oxygen is considered to have great application prospects. [0003] For semiconductor th...

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): C25B1/04C25B11/06
CPCC25B1/04C25B1/55C25B11/091Y02E60/36
Inventor 王涛高斌范晓莉龚浩冯亚亚郭虎李晶晶何建平黄现礼
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS