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Preparation and application method of long-life friction-sensitive graphdiyne-based piezoelectric material

A technology of graphyne and electrical materials, applied in chemical instruments and methods, electrochemical water/sewage treatment, physical/chemical process catalysts, etc., can solve problems such as activity reduction, active site destruction, and catalytic activity maintenance, and achieve pore Multi-stage, low-cost, distinct friction-response effect

Active Publication Date: 2020-08-07
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the action of mechanical force, the active sites of the piezoelectric catalytic material will be gradually destroyed, and the activity will gradually decrease. Studies have shown that fixing the piezoelectric catalytic material on PVDF can improve the stability of the material, but after 10 cycles, the catalytic activity only maintained 80%

Method used

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  • Preparation and application method of long-life friction-sensitive graphdiyne-based piezoelectric material
  • Preparation and application method of long-life friction-sensitive graphdiyne-based piezoelectric material
  • Preparation and application method of long-life friction-sensitive graphdiyne-based piezoelectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Take hexabromobenzene and calcium carbide according to a molar ratio of 1:6, place in a 100mL vacuum polytetrafluoro ball mill reactor, add 50 milliliters of ethanol, add 100g of zirconia balls with a diameter of 4mm as a medium, and pump Vacuum, ball milling for 8 hours under the condition of rotating speed of 800 rpm.

[0029] 2) The powder sample after ball milling was taken out, washed twice with deionized water and ethanol sequentially, and dried at 90°C for 10 h to obtain thin-layer graphdiyne powder.

[0030] 3) Weigh tungsten dioxide, thiourea and sodium hydroxide according to the molar ratio of 1:10:0.1, and place them in a 100mL polytetrafluoro ball mill reactor.

[0031] 4) Weigh the graphdiyne powder obtained in step 2) with a mass of 0.2 g, add it to the reaction kettle of step 3), and ball mill it for 3 hours at 800 rpm to obtain the graphyne-based composite piezoelectric catalytic material precursor powder .

[0032] 5) Put the precursor powder obtai...

Embodiment 2

[0037] 1) Weigh hexahalobenzene and calcium carbide according to the molar ratio of 1:8, place in a 100mL vacuum polytetrafluoro ball mill reactor, add 200g of zirconia balls with a diameter of 4mm as the medium, vacuumize, and Under the condition of 1000 rev / min, ball mill for 6h.

[0038] 2) The powder sample after ball milling was taken out, washed twice with deionized water and ethanol sequentially, and dried at 80° C. for 6 hours to obtain thin-layer graphdiyne powder.

[0039] 3) Weigh ammonium molybdate, thiourea and sodium hydroxide according to the molar ratio of 1:8:0.5, and place them in a 100mL polytetrafluoro ball mill reactor.

[0040] 4) Weigh the graphyne powder obtained in step 2) with a mass of 0.1 g, add it to the reaction kettle of step 3), and ball mill it for 5 hours at 800 rpm to obtain the graphyne-based composite piezoelectric catalytic material precursor powder .

[0041] 5) Put the precursor powder obtained in step 4) in the tube furnace, under N ...

Embodiment 3

[0047] 1) Weigh hexahalobenzene and calcium carbide according to the molar ratio of 1:4, place in a 100mL vacuum polytetrafluoro ball mill reaction kettle, add 200g of zirconia balls with a diameter of 6mm as the medium, vacuumize, at a speed of Under the condition of 1000 rev / min, ball mill for 6h.

[0048] 2) Remove the ball-milled sample, wash twice with deionized water and ethanol in sequence, and dry to obtain thin-layer graphdiyne powder.

[0049] 3) Weigh Bi(OH) according to the molar ratio of 4:3 3 with Ti(OH) 4 Powder, placed in a 100mL polytetrafluoro ball mill reactor.

[0050] 4) Weigh the graphyne powder obtained in step 2) with a mass of 0.5 g, add it to the reaction kettle of step 3), and ball mill it for 6 hours at 1000 rpm to obtain the graphyne-based composite piezoelectric catalytic material precursor powder .

[0051] 5) Put the precursor powder obtained in step 4) in the tube furnace, under N 2 Under atmosphere, activate at 250°C for 4h, then cool to ...

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Abstract

The invention relates to a preparation and application method of a long-life friction-sensitive graphdiyne-based piezoelectric material, in particular to application of the long-life friction-sensitive graphdiyne-based piezoelectric material in the fields of interface catalytic reaction and water quality purification, and belongs to the technical field of preparation and application of novel functional materials. A novel graphdiyne material with the high piezoelectric response is mainly used as a structure regulating agent, a piezoelectric material is induced to grow on the edge of the graphdiyne material in an oriented mode in situ, active defects are formed, separation of electrons and holes is accelerated, and the piezoelectric catalytic performance of the composite material is remarkably improved. Meanwhile, the material is synthesized by a mechanochemical method and the size and the layer thickness of the material are regulated and controlled, so that the friction sensitivity of the composite piezoelectric catalytic material is improved, the mechanical stability of the composite piezoelectric catalytic material is enhanced, and the dual goals of high piezoelectric activity andlong service life are achieved. Under the condition that an in-situ ball milling method provides a mechanical force, organic pollutants in water can be efficiently and sustainably oxidized and degraded through a piezoelectric catalytic reaction.

Description

technical field [0001] The present invention provides a preparation and application method of a high-life friction-sensitive graphityne-based piezoelectric material, and relates to a preparation method of a high-life friction-sensitive graphityne-based piezoelectric material, especially relating to its catalytic reaction at the interface and water quality. The application in the purification field belongs to the technical field of preparation and application of new functional materials. Background technique [0002] Piezoelectric catalytic materials are one of the emerging excellent materials in recent years, but most of the applications of materials are mainly aimed at the energy field, and the application in the environmental field still needs to be further expanded and studied. Recently, CN109331882A disclosed an organic piezoelectric-photocatalytic composite helical fiber, which can continuously generate self-healing piezoelectric potential under the action of water flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/18B01J27/047B01J27/051B01J35/02C02F1/46B01J35/00
CPCB01J21/18B01J23/18B01J27/051B01J27/047C02F1/46B01J35/00B01J35/30B01J35/33Y02W10/37
Inventor 孟凡庆王英龙朱兆友崔培哲齐建光李鑫孙萌娅孙瑞
Owner QINGDAO UNIV OF SCI & TECH
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