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Zinc vanadate electro-catalytic material as well as preparation method and application thereof

An electrocatalytic material, the technology of zinc vanadate, applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems such as the general shape of zinc vanadate, and achieve the effect of uniform and continuous shape, easy operation and excellent performance

Pending Publication Date: 2022-04-12
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the zinc vanadate prepared in this patent has a general appearance and is used to degrade rhodamine B solution to explore the photocatalytic performance

Method used

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  • Zinc vanadate electro-catalytic material as well as preparation method and application thereof
  • Zinc vanadate electro-catalytic material as well as preparation method and application thereof
  • Zinc vanadate electro-catalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of zinc vanadate electrocatalytic material, comprising steps as follows:

[0052](1) Dissolve 0.45 g of zinc nitrate hexahydrate, 0.12 g of ammonium metavanadate and 1 g of citric acid in 14 mL of deionized water, then add 1.5 mL of hydrochloric acid with a mass concentration of 37 wt%, and stir for 180 min to obtain the precursor body solution;

[0053] (2) Weigh 1.2 g of polyvinylpyrrolidone (PVP) and dissolve it in 15 mL of absolute ethanol, stir well; then add 3 mL of the precursor solution prepared in step (1) into it to obtain the precursor sol; The sol was electrospun at a pressure of 20 kV, a relative humidity of 20%, and room temperature. The spinning receiving distance was 20 cm and the advancing speed was 1 mL / h to obtain precursor fibers.

[0054] (3) The precursor fiber prepared in step (2) was dried at 40 °C for 12 h, then placed in a tube furnace, and the temperature was raised to 450 °C at a heating rate of 1 °C / min, at 450 °C The ...

Embodiment 2

[0058] A preparation method of zinc vanadate electrocatalytic material, comprising steps as follows:

[0059] (1) Dissolve 0.45 g of zinc nitrate hexahydrate, 0.12 g of ammonium metavanadate and 1 g of citric acid in 14 mL of deionized water, then add 1.5 mL of nitric acid with a mass concentration of 66 wt%, and stir for 120 min to obtain the precursor body solution;

[0060] (2) Weigh 0.8 g of polyvinylpyrrolidone (PVP) and dissolve it in 10 mL of absolute ethanol, stir well; then add 2 mL of the precursor solution prepared in step (1) into it to obtain the precursor sol; The sol was electrospun at a pressure of 25 kV, a relative humidity of 30%, and room temperature. The spinning receiving distance was 15 cm and the advancing speed was 1.2 mL / h to obtain precursor fibers.

[0061] (3) The precursor fiber prepared in step (2) was dried at 40 °C for 16 h, then placed in a tube furnace, and the temperature was raised to 450 °C at a heating rate of 2 °C / min, at 450 °C The ele...

Embodiment 3

[0063] A preparation method of zinc vanadate electrocatalytic material, comprising steps as follows:

[0064] (1) Dissolve 0.5 g of zinc nitrate hexahydrate, 0.13 g of ammonium metavanadate and 1.12 g of citric acid in 16 mL of deionized water, then add 2 mL of 99 wt% acetic acid dropwise, and stir for 150 min to obtain the precursor body solution;

[0065] (2) Weigh 0.9 g of polyvinylpyrrolidone (PVP) and dissolve it in 12 mL of absolute ethanol, stir well; then add 2 mL of the precursor solution prepared in step (1) into it to obtain the precursor sol; The sol was electrospun at a pressure of 20 kV, a relative humidity of 25%, and room temperature. The spinning receiving distance was 25 cm and the advancing speed was 1 mL / h to obtain precursor fibers.

[0066] (3) The precursor fiber prepared in step (2) was dried at 60 °C for 12 h, then placed in a tube furnace, and the temperature was raised to 450 °C at a heating rate of 2 °C / min, at 450 °C The electrocatalytic material...

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Abstract

The invention belongs to the technical field of electro-catalytic materials, and particularly relates to a zinc vanadate electro-catalytic material as well as a preparation method and application thereof. The zinc vanadate nanofibers are prepared by combining a sol-gel method with an electrostatic spinning technology, and the prepared fibers are porous nanofibers with the diameter of 100-200 nm, have a large length-diameter ratio and are uniform and continuous in morphology. The zinc vanadate nanofiber prepared by the method disclosed by the invention is excellent in oxygen reduction (ORR) performance. The preparation method disclosed by the invention is simple in process equipment, simple and convenient to operate, low in raw material cost, free of wastewater and waste gas emission in the preparation process, environment-friendly and has the potential of large-scale production, and the obtained zinc vanadate nanofiber has a porous structure. The zinc vanadate electrocatalytic material prepared by the invention is green and pollution-free, and does not generate secondary pollution to the environment in the application process.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, in particular to a zinc vanadate electrocatalytic material and its preparation method and application. Background technique [0002] Due to the continuous reduction of fossil fuels and the deterioration of the environment, it is of great significance and urgency to explore abundant, environmentally friendly, and renewable energy sources. Many energy conversion and storage technologies have been widely developed due to their high efficiency and environmental friendliness, such as proton exchange membrane fuel cells (direct conversion of free energy of chemical reactions into electricity), water electrolyzers (water splitting to produce oxygen and hydrogen), regenerative batteries (a system consisting of an electrolyzer and a fuel cell). To some extent, electrochemical processes play an important role in these systems, for example, occurring in the H 2 -O 2 Oxygen reduction re...

Claims

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Application Information

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IPC IPC(8): H01M4/90D01D5/00D01D5/247D01D10/06D01F9/08
CPCY02E60/50
Inventor 卢启芳李雪司聪慧郭恩言魏明志
Owner QILU UNIV OF TECH
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