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Preparation method and application of photo-thermal thermoelectric catalyst based on thermoelectric material

A technology of thermoelectric materials and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, carbon monoxide, etc., can solve problems such as unfavorable preservation and transportation, fruit tree rot, high energy consumption, etc., to improve catalytic reaction rate and optimize reaction Kinetics, effect of efficient catalytic conversion reaction progress

Active Publication Date: 2021-02-26
TSINGHUA UNIV
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Problems solved by technology

Similarly, for the volatile organic compounds widely present in the daily life environment, such as toluene, benzene, formaldehyde and ethylene, etc., they are the causes of certain harm to the human body or food preservation in home decoration and industrial production, wherein ethylene is a Fruit and vegetable ripening agent, however, excessive ethylene will lead to premature decay of fruit trees, which is not conducive to long-term preservation and transportation, but in the research of ethylene removal, traditional methods still face problems such as low efficiency and high energy consumption

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  • Preparation method and application of photo-thermal thermoelectric catalyst based on thermoelectric material
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  • Preparation method and application of photo-thermal thermoelectric catalyst based on thermoelectric material

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preparation example Construction

[0026] The preparation method of the photothermal thermoelectric catalyst based on the thermoelectric material proposed by the present invention comprises the following steps:

[0027] (1) Preparation of bismuth copper selenide oxygen thermoelectric ceramic powder by solid phase method or mechanical alloy method:

[0028] According to the stoichiometric ratio Bi 1-X Er X CuSeO, weigh the solid powder of bismuth powder, bismuth oxide powder, selenium powder, erbium oxide and copper powder, put all the raw materials into a ball mill pot or mortar and mix them well, then carry out high-energy ball milling under the protection of argon, the ball milling time is For 8 hours, the rotational speed of the ball mill was 400r / min, and an erbium-doped bismuth-copper-selenooxygen thermoelectric ceramic block powder was obtained, X=0~0.12;

[0029] (2) Break the ceramic powder in step (1) and continue wet ball milling for 1 hour. After drying, adopt the discharge plasma sintering method,...

Embodiment 1

[0048] (1) Preparation of bismuth copper selenide oxygen thermoelectric ceramic powder by solid phase method or mechanical alloy method:

[0049] For the bismuth-copper-selenium-oxygen thermoelectric ceramics, bismuth powder, bismuth oxide powder, selenium powder and copper powder are selected as raw materials, and erbium oxide is selected as one of the raw materials for erbium element doping.

[0050] According to the stoichiometric ratio Bi 1-X Er X CuSeO, weigh bismuth powder, bismuth oxide powder, selenium powder, erbium oxide and copper solid powder, put all the raw materials into a ball mill jar or mortar and mix well, then carry out high-energy ball milling under the protection of argon, the ball milling time is 8 Hour, the ball mill rotating speed is 400r / min, obtains the bismuth copper selenide oxide (Bi 0.9 Er 0.1 CuSeO) thermoelectric ceramic bulk powder, wherein X=0.1;

[0051] (2) After crushing the ceramic powder in step (1), continue wet ball milling for 1 h...

Embodiment 2

[0059] (1) Preparation of bismuth-copper-selenide-oxygen thermoelectric ceramic powder by solid phase method or mechanical alloying method:

[0060] For the bismuth-copper-selenide oxygen thermoelectric ceramics, the selected raw materials are bismuth powder, bismuth oxide powder, selenium powder and copper powder.

[0061] According to the stoichiometric ratio of BiCuSeO, weigh the solid powder of bismuth powder, bismuth oxide powder, selenium powder and copper powder, put all the raw materials into a ball mill pot or mortar and mix them well, then carry out high-energy ball milling under the protection of argon. For 8 hours, the rotating speed of the ball mill is 400r / min, to obtain bismuth copper selenide oxygen (BiCuSeO) thermoelectric ceramic block powder;

[0062] (2) After breaking the ceramic powder in step (1), continue wet ball milling for 1 hour, then use discharge plasma sintering method, under the pressure of 50MPa, keep warm at 650°C for 5min, and then cool with ...

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Abstract

The invention belongs to the technical field of new materials and application thereof and non-metallic materials, and particularly relates to a preparation method and application of a photo-thermal thermoelectric catalyst based on a thermoelectric material. The photo-thermoelectric catalyst provided by the invention adopts a semiconductor thermoelectric material as a substrate, can effectively absorb light of a specific waveband to generate photo-generated electron hole pairs, and separates photo-generated carriers by utilizing a Seebeck effect caused by a temperature gradient generated by a solar photo-thermal effect. According to the photo-thermal thermoelectric catalyst disclosed by the invention, multiple effective utilization of solar energy resources is realized by utilizing a photo-thermal temperature gradient generated by the Seebeck effect. In addition, the photo-thermal electric effect can further improve the catalytic reaction rate by functionalizing the substrate material except for the surface chemical category, and can be applied to various reaction processes such as carbon dioxide reduction and the like. According to the catalyst, solar energy resources are fully utilized, and a thermoelectric material substrate is utilized to fuse basic processes of photochemistry and thermoelectricity physics, so that a novel, green and efficient reaction process is realized.

Description

technical field [0001] The invention belongs to the technical fields of new materials and their applications, and non-metallic materials, and in particular relates to a preparation method and application of a photothermal thermoelectric catalyst based on thermoelectric materials. Background technique [0002] In the context of the gradual depletion of global fossil energy, the construction of a chemical system that uses carbon dioxide as a carbon molecule has gradually become the most competitive system in the future, in which it directly catalyzes the conversion of carbon dioxide gas into carbon monoxide, methane, formic acid, and ethylene. Chemicals are of great significance. Traditional thermocatalysis and electrocatalysis are faced with huge energy consumption and major environmental problems. Under the premise that non-renewable energy power supply accounts for a large proportion, it is still impossible to achieve net reduction of carbon dioxide. Among them, through The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C07C1/12C07C9/04C01B32/40
CPCB01J27/0573C07C1/12C01B32/40B01J35/33B01J35/39C07C9/04Y02P20/133
Inventor 林元华许于帅罗屹东刘耀春
Owner TSINGHUA UNIV
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