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Method for preparing bismuth vanadate film through two-step spray pyrolysis and application thereof

A technology of spray pyrolysis and bismuth vanadate, which is applied in the fields of chemical instruments and methods, hydrogen production, physical/chemical process catalysts, etc. It can solve the problems of extremely high equipment requirements, low yield, and difficult control of electrodeposition experimental conditions, etc. problem, to achieve the effect of cost reduction

Active Publication Date: 2021-04-30
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the experimental conditions of the electrodeposition method are difficult to control, and the yield rate is low; the chemical vapor deposition method and laser sputtering deposition method have extremely high requirements on equipment, which is also not conducive to industrialization

Method used

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  • Method for preparing bismuth vanadate film through two-step spray pyrolysis and application thereof
  • Method for preparing bismuth vanadate film through two-step spray pyrolysis and application thereof
  • Method for preparing bismuth vanadate film through two-step spray pyrolysis and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve bismuth nitrate pentahydrate in ethylene glycol solution to obtain a bismuth nitrate solution with a concentration of 0.02mol / L; dissolve ammonium iodide in ethylene glycol solution to obtain a 0.02mol / L ammonium iodide solution; mix bismuth nitrate solution with The ammonium iodide solution was uniformly mixed, methanol was added, and the viscosity of the mixed solution was controlled to be 20 cps to obtain a precursor solution.

[0029] The area of ​​the FTO conductive glass is 20cm×20cm. The temperature of the FTO conductive glass substrate is controlled to 200°C by using a flat heating table, and the precursor solution at room temperature is atomized and sprayed on the FTO glass substrate by using a high-speed airflow atomization or ultrasonic atomization device. , the control spraying speed is 0.1 ml / cm2 / min, and the typical total amount of spraying is 5 ml / cm2. A BiOI thin film with a thickness of about 550 nm was formed on the FTO glass substrate.

[00...

Embodiment 2

[0034] Dissolve bismuth nitrate pentahydrate in ethylene glycol solution to obtain a bismuth nitrate solution with a concentration of 0.02mol / L; dissolve ammonium iodide in ethylene glycol solution to obtain a 0.1mol / L ammonium iodide solution; mix bismuth nitrate solution with The ammonium iodide solution was uniformly mixed, methanol was added, and the viscosity of the mixed solution was controlled to be 26 cps, which was the precursor solution.

[0035] The area of ​​the FTO conductive glass is 20cm×20cm. The temperature of the FTO conductive glass substrate is controlled to 400°C by using a flat heating table, and the precursor solution at room temperature is atomized and sprayed on the FTO glass substrate by using a high-speed airflow atomization or ultrasonic atomization device. , the control spraying speed is 0.5 ml / cm2 / min, and the typical spraying amount is 10 ml / cm2. A BiOI thin film with a thickness of about 700 nm was formed on the FTO glass substrate.

[0036]0.5...

Embodiment 3

[0038] Dissolve bismuth nitrate pentahydrate in ethylene glycol solution to obtain a bismuth nitrate solution with a concentration of 0.02mol / L; dissolve ammonium iodide in ethylene glycol solution to obtain a 0.04mol / L ammonium iodide solution; mix bismuth nitrate solution with The ammonium iodide solution was uniformly mixed, methanol was added, and the viscosity of the mixed solution was controlled to be a precursor solution of 12 cps.

[0039] The area of ​​the FTO conductive glass is 20cm×20cm. The temperature of the FTO conductive glass substrate is controlled to 320°C by using a flat heating table, and the precursor solution at room temperature is atomized and sprayed on the FTO glass substrate by using a high-speed airflow atomization or ultrasonic atomization device. , the control spraying speed is 0.1 ml / cm2 / min, and the typical total amount of spraying is 5 ml / cm2. A BiOI thin film with a thickness of about 460 nm was formed on the FTO glass substrate.

[0040] 0.5...

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Abstract

The invention provides a method for preparing a bismuth vanadate film through two-step spray pyrolysis. The method comprises the following steps: taking a mixed organic solution containing ammonium iodide and bismuth nitrate as a precursor; controlling the temperature of the conductive substrate to be 200-400 DEG C, atomizing the precursor solution, spraying the atomized precursor solution on the conductive substrate, and controlling the spraying speed to be 0.1-2 ml / cm<2> / min and the total spraying amount to be 5-20 ml / cm<2> to form a BiOI film; and then, uniformly spraying the molybdenum-doped vanadyl acetylacetonate DMSO mixed solution on the BiOI film at the temperature of 80-120 DEG C, and calcining at the temperature of 300-500 DEG C for 1-5 hours to obtain the bismuth vanadate film. The method is low in cost, simple and easy to operate, can be used for preparing the bismuth vanadate film with a nano structure, a large area and high performance, and can be used as a photo-anode for hydrogen production by photoelectrocatalytic decomposition of water.

Description

technical field [0001] The invention belongs to the field of material preparation and photoelectric catalysis, and in particular relates to a method for preparing a bismuth vanadate thin film by two-step spray pyrolysis and its application in photoelectric catalytic decomposition of water to produce hydrogen. Background technique [0002] At present, the carbon emissions produced by fossil fuels and the environmental problems caused by energy distribution and unbalanced consumption are becoming more and more serious. New renewable and clean energy has become a key issue related to the sustainable development of mankind. Hydrogen energy derived from solar energy has attracted increasing attention in recent years and is considered to be one of the most likely solutions to the challenges of human future energy development. One of the core issues is how to efficiently convert solar energy into hydrogen energy. Among many solutions, the photoelectric catalytic water splitting sys...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J35/06C01B3/04
CPCB01J23/22C01B3/042C01B2203/0277C01B2203/1088B01J35/33B01J35/59B01J35/39Y02E60/36
Inventor 刘德宇况永波田恒政
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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