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Composite micropowder with hierarchical heterogeneous structure and its preparation method and application

A heterogeneous structure and micropowder technology, which is applied in the application field of ultraviolet detectors, achieves the effects of good stability and recovery, fast response speed, and simple preparation process

Active Publication Date: 2021-05-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to form as many micron or nanoscale P-N junctions as possible between n-type zinc oxide and p-type polyaniline, expand the area of ​​the P-N junction, and make the two different components in the junction have a good connection is a challenge

Method used

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  • Composite micropowder with hierarchical heterogeneous structure and its preparation method and application
  • Composite micropowder with hierarchical heterogeneous structure and its preparation method and application
  • Composite micropowder with hierarchical heterogeneous structure and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0047] (1) Preparation of graphene oxide / polyaniline with hierarchical heterostructure: ultrasonically disperse 5 mg of graphene oxide in 50 ml of 0.5 mol / L perchloric acid and 5 ml of methanol to form a uniform suspension. Then stir at 0°C for 10min, then add 0.01g of aniline monomer that has been refined and refrigerated in advance to the above suspension, and then add 2ml of ammonium persulfate / perchloric acid solution at 5°C after continuing to stir for 20min (the amount of perchloric acid The concentration is 0.5mol / L, the ammonium persulfate / perchloric acid is 30g / mol), and the dark green product is obtained after continuing to react at 0°C for 12h. After centrifugation, washing and drying, the graphene oxide / polyaniline nanocomposite micropowder with hierarchical heterostructure is obtained. The length and width of the inner core are about 2-6 μm, and the thickness is about 1-5 nm. The diameter of needle-like nano polyaniline is 10nm, and the length is 20nm.

[0048] (2...

Embodiment 2

[0052] (1) Preparation of graphene oxide / polyaniline with hierarchical heterostructure: ultrasonically disperse 12 mg of graphene oxide in 60 ml of 1 mol / L perchloric acid and 5 ml of ethanol to form a uniform suspension. Then stir at -5°C for 18min, then add 0.15g of aniline monomer refined and refrigerated in advance to the above suspension, and then add 5ml of ammonium persulfate / perchloric acid solution at 3°C ​​after continuous stirring for 40min (perchloric acid The concentration of the ammonium persulfate / perchloric acid is 1mol / L, and the ammonium persulfate / perchloric acid is 29g / mol), and the dark green product is obtained after continuing to react at -5°C for 36h. After centrifugation, washing and drying, the graphene oxide / polyaniline nanocomposite micropowder with hierarchical heterostructure is obtained. The length and width of the inner core are about 2-6 μm, and the thickness is about 1-5 nm. The diameter of needle-like nano polyaniline is 20nm, and the length...

Embodiment 3

[0058] (1) Preparation of graphene oxide / polyaniline with hierarchical heterostructure: ultrasonically disperse 30 mg of graphene oxide in 150 ml of 5 mol / L perchloric acid and 3 ml of n-propanol to form a uniform suspension. Then stir at 5°C for 30min, then add 0.20g of aniline monomer that has been refined and refrigerated in advance to the above suspension, and then add 8ml of ammonium persulfate / perchloric acid solution at 5°C after continuing to stir for 60min (the amount of perchloric acid The concentration is 5mol / L, the ammonium persulfate / perchloric acid is 20g / mol), and the dark green product is obtained after continuing to react at 5°C for 8h. After centrifugation, washing and drying, the graphene oxide / polyaniline nanocomposite micropowder with hierarchical heterostructure is obtained. The length and width of the inner core are about 2-6 μm, and the thickness is about 1-5 nm. The diameter of needle-like nano polyaniline is 20nm, and the length is 30nm.

[0059] (...

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Abstract

The invention provides a graphene oxide / polyaniline / zinc oxide nanocomposite micropowder with a hierarchical heterogeneous structure and its preparation method and application. The shell is formed by the middle layer and zinc oxide quantum dots; among them, the needle-like nano-polyaniline is vertically grown and arranged on the sheet-like graphene oxide in the form of an array; the preparation process of the product of the present invention is simple, the reaction conditions are mild and easy to realize, and the process repeatability is good ; The ultraviolet light detector prepared by using the composite micropowder of the present invention has the characteristics of fast response speed and good stability recovery.

Description

[0001] (1) Technical field [0002] The invention relates to a graphene oxide / polyaniline / zinc oxide nanocomposite micropowder with a hierarchical heterogeneous structure, a preparation method thereof, and an application of the composite micropowder in an ultraviolet detector. [0003] (2) Background technology [0004] A photosensitive material is a substance that can absorb light of a certain wavelength and generate electron-hole pairs, and use the directional movement of electron-holes to generate electrical signals. Preparation of functionalized nanomaterials with photocurrent sensitivity is one of the current research hotspots. Such as nano-zinc oxide, nano-titanium dioxide, nano-tin dioxide, nano-nickel oxide, nano-cadmium sulfide, etc. Among them, nano-ZnO has the advantages of low growth temperature, environmental friendliness, high sensitivity to ultraviolet light, and low manufacturing cost, and has become one of the preferred materials for realizing high-performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08K3/04C08K3/22
CPCC08K3/22C08K2003/2296C08K3/042C08L79/02
Inventor 范萍陈静怡樊哲钟明强杨晋涛陈枫费正东
Owner ZHEJIANG UNIV OF TECH