Preparation method and application of a photothermal thermoelectric catalyst based on thermoelectric materials

A technology of thermoelectric materials and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, carbon monoxide, etc., can solve the problems of low efficiency, high energy consumption, unfavorable preservation and transportation, etc.

Active Publication Date: 2021-09-10
TSINGHUA UNIV
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  • Description
  • Claims
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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 a photothermal thermoelectric catalyst based on thermoelectric materials
  • Preparation method and application of a photothermal thermoelectric catalyst based on thermoelectric materials
  • Preparation method and application of a photothermal thermoelectric catalyst based on thermoelectric materials

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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 selenoxy thermoelectric ceramic powder by solid phase method or mechanical alloying method:

[0028] Bi in stoichiometric ratio 1-X Er X CuSeO, take by weighing the solid powders of bismuth powder, bismuth oxide powder, selenium powder, erbium oxide and copper powder, put all the raw materials into a ball milling jar or a mortar and mix well, then carry out high-energy ball milling under argon protection, and the ball milling time is For 8 hours, the speed of the ball mill is 400 r / min, and the erbium-doped bismuth copper selenoxy thermoelectric ceramic bulk powder is obtained, X=0~0.12;

[0029] (2) After crushing the ceramic powder in step (1), continue wet ball milling for 1 hour. After drying, the spark plasma sintering method is used. Under the pressure o...

Embodiment 1

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

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

[0050] Bi in stoichiometric ratio 1-X Er X CuSeO, weigh the solid powders of bismuth powder, bismuth oxide powder, selenium powder, erbium oxide and copper, put all the raw materials into a ball milling jar or mortar and mix well, carry out high-energy ball milling under argon protection, and the ball milling time is 8 hour, the ball mill speed was 400 r / min, and erbium-doped bismuth copper selenoxide (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 hour, and after drying, adopt the spa...

Embodiment 2

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

[0060] For the bismuth copper selenoxy 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 powders of bismuth powder, bismuth oxide powder, selenium powder and copper powder, put all the raw materials into a ball milling jar or mortar and mix well, then carry out high-energy ball milling under argon protection, and the ball milling time is long For 8 hours, the speed of the ball mill was 400 r / min, and the bismuth copper selenide oxide (BiCuSeO) thermoelectric ceramic bulk powder was obtained;

[0062] (2) After crushing the ceramic powder in step (1), continue wet ball milling for 1 hour, and then adopt the spark plasma sintering method to keep the temperature at 650°C for 5min under the pressu...

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Abstract

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. The photothermal electrocatalyst of the present invention adopts semiconductor thermoelectric material as a substrate, can effectively absorb light in a specific band at the same time to generate photogenerated electron-hole pairs, and utilizes the Seebeck effect caused by the temperature gradient generated by the solar photothermal effect to separate photogenerated carriers. The photothermal thermoelectric catalyst of the present invention utilizes the photothermal temperature gradient generated by the Seebeck effect to realize multiple effective utilization of solar energy resources. In addition, the photothermoelectric effect can further improve the catalytic reaction rate through functionalized substrate materials in addition to the surface chemistry category, and can be applied to many reaction processes such as carbon dioxide reduction. The catalyst makes full use of solar energy resources, and uses the thermoelectric material substrate to integrate the basic process of photochemistry and thermoelectric physics, so as to realize a new, green and efficient reaction process.

Description

technical field [0001] The invention belongs to the technical fields of new materials and applications thereof, 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] Under the background of the gradual depletion of global fossil energy, the construction of a chemical system with carbon dioxide as a carbon molecule has gradually become the most competitive system in the future, which directly catalyzes the conversion of carbon dioxide gas into carbon monoxide, methane, formic acid and ethylene and other valuable The chemicals are of great significance. Traditional thermal catalysis 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, the net reduction of carbon dioxide still cannot be achieved. The reve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057C07C1/12C07C9/04C01B32/40
CPCB01J27/0573B01J35/0033B01J35/004C07C1/12C01B32/40C07C9/04Y02P20/133
Inventor 林元华许于帅罗屹东
Owner TSINGHUA UNIV
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