P-n-BaTiO3/NiO heterojunction piezoelectric ceramic, preparation method thereof and application in self-powered efficient hydrogen production

A p-n-batio3, n-batio3 technology, applied in the field of p-n-BaTiO3/NiO heterojunction piezoelectric ceramic materials, can solve the problems of low piezoelectric catalytic efficiency and easy charge recombination

Active Publication Date: 2021-05-18
SUZHOU JINHONG GAS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of p-n-BaTiO that improves piezoelectric charge separation efficiency 3 / NiO heterojunction piezoelectric ceramic material, its preparation method, and its application in the vehicle-mounted self-supply energy-efficient production of high-purity hydrogen, in order to overcome the shortcomings of the existing hydrogen production technology that the charges generated by piezoelectricity are easy to recombine, resulting in low piezoelectric catalytic efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The p-n-BaTiO 3 The preparation method of / NiO heterojunction piezoelectric ceramic material comprises the following steps:

[0063] (1) Preparation of BaTiO 3 Ceramic blank particles: react barium chloride, titanium chloride and sodium hydroxide to form BaTiO 3 ceramic pellets;

[0064] (2) Granulation: to the BaTiO obtained in step (1) 3 A certain amount of polyvinyl alcohol solution is added to the granules, and then ball milled to granulate;

[0065] (3) Preparation of pottery: the BaTiO obtained in step (2) 3 The ceramic blank particles are added into a mold of a certain size, and pressed into a ceramic blank under a pressure of 10MPa by a film pressing machine;

[0066] (4) Degumming: heat the pottery blank to 520°C, and carry out degumming treatment at a constant temperature for 2 hours;

[0067] (5) Molding: After degumming, treat it at a temperature of 1100°C for 2 hours, and make BaTiO after cooling 3 ceramics;

[0068] (6)p-n-BaTiO 3 / NiO Piezoelectri...

Embodiment 2

[0075] The p-n-BaTiO 3 The preparation method of / NiO heterojunction piezoelectric ceramic material comprises the following steps:

[0076] (1) Preparation of BaTiO 3 Ceramic blank particles: react barium nitrate, titanium nitrate and ammonia water to form BaTiO 3 ceramic pellets;

[0077] (2) Granulation: to the BaTiO obtained in step (1) 3 A certain amount of polyvinyl alcohol solution is added to the ceramic granules, and then ball milled to granulate;

[0078] (3) Preparation of pottery: the BaTiO obtained in step (2) 3 The particles are added into a mold of a certain size, and pressed into a ceramic blank under a pressure of 15MPa by a film pressing machine;

[0079] (4) Degumming: heat the pottery blank to 450°C, and degumming at constant temperature for 2 hours;

[0080] (5) Molding: After degumming, treat it at a temperature of 1200°C for 1 hour, and make BaTiO after cooling 3 ceramics;

[0081] (6)p-n-BaTiO 3 / NiO Piezoelectric Ceramics: In BaTiO 3 Uniform co...

Embodiment 3

[0088] The p-n-BaTiO 3 The preparation method of / NiO heterojunction piezoelectric ceramic material comprises the following steps:

[0089] (1) Preparation of BaTiO 3 Ceramic blank particles: react barium chloride, titanium nitrate and potassium hydroxide to form BaTiO 3 ceramic pellets;

[0090] (2) Granulation: to the BaTiO obtained in step (1) 3 A certain amount of polyvinyl alcohol solution is added to the ceramic granules, and then ball milled to granulate;

[0091] (3) Preparation of pottery: the BaTiO obtained in step (2) 3 The ceramic blank particles are added into a mold of a certain size, and pressed into a ceramic blank under a pressure of 20MPa by a film pressing machine;

[0092] (4) Degumming: heat the pottery blank to 500°C, and carry out degumming treatment at constant temperature for 2 hours;

[0093] (5) Molding: After degumming, treat it at a temperature of 1150°C for 1 hour, and make BaTiO after cooling 3 ceramics;

[0094] (6)p-n-BaTiO 3 / NiO Piezo...

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Abstract

The invention provides a p-n-BaTiO3/NiO heterojunction piezoelectric ceramic, a preparation method thereof, and an application in self-powered efficient hydrogen production. The heterojunction piezoelectric ceramic comprises an n-BaTiO3 piezoelectric ceramic matrix and a p-NiO material, wherein the p-NiO material and the n-BaTiO3 piezoelectric ceramic matrix form a heterojunction, and the mass fraction of p-NiO is 0.1-10 wt%. According to the BaTiO3/NiO heterojunction piezoelectric ceramic provided by the invention, a built-in electric field is constructed, the recombination rate of charges is low, the piezoelectric catalytic activity is high, and water wave energy, sound wave energy and wind energy in nature can be used as driving force for piezoelectric catalytic hydrogen production. The prepared hydrogen is high in purity, does not contain carbon monoxide, hydrogen sulfide, hydrogen phosphide, chloride ions and other gases which cause poisoning of the fuel cell, is simple and feasible in preparation method, is green and environment-friendly, and does not discharge substances harmful to the environment.

Description

technical field [0001] The present invention relates to a kind of p-n-BaTiO 3 / NiO heterojunction piezoelectric ceramics, especially p-n-BaTiO 3 / NiO heterojunction piezoelectric ceramic material, its preparation method and its application in vehicle-mounted self-supplied energy and efficient hydrogen production belong to the field of clean energy materials. Background technique [0002] Piezoelectric catalysis is a way to convert mechanical energy into chemical energy, that is, under the action of external mechanical force, the surface of the piezoelectric material generates positive and negative charges due to external forces, and these charges will accelerate the adsorption on the surface of the piezoelectric material. A substance undergoes a redox reaction. Piezoelectric materials can absorb mechanical energy such as sound, water waves, vibrations, etc. to generate charge separation, so that the two sides of the piezoelectric material have charges of different signs. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/638C04B41/87C01B3/04B01J23/78
CPCC04B35/468C04B35/622C04B35/638C04B41/87C04B41/5027C01B3/04B01J23/78C04B2235/6567C04B41/455C04B41/4535C04B41/0072Y02P20/133Y02E60/36
Inventor 金向华刘守清李华
Owner SUZHOU JINHONG GAS CO LTD
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