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Graphene/europium oxide photoelectric composite material and preparation method thereof

A composite material and graphene technology, applied in the direction of conductive materials, conductive materials, luminescent materials, etc., can solve the problems of poor optical properties and few researches, and achieve good electrical and optical properties, good thermal stability, and good application foreground effect

Inactive Publication Date: 2011-04-27
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor optical properties of graphene, it has been rarely studied in the field of optoelectronics

Method used

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  • Graphene/europium oxide photoelectric composite material and preparation method thereof
  • Graphene/europium oxide photoelectric composite material and preparation method thereof
  • Graphene/europium oxide photoelectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of graphite oxide: Slowly add 1g of 200 mesh natural graphite powder into a 500ml beaker containing 23ml of concentrated sulfuric acid under stirring, keep the temperature at 0°C, then slowly add 0.5g of sodium nitrate and 3g of permanganate The mixture of potassium was stirred and reacted at 0°C for 2 hours, then placed in a constant temperature water bath at 35°C, kept under stirring for 30 minutes, slowly added 46ml of water to raise the temperature to 98°C, and maintained at this temperature for 15 minutes; dilute to 140ml with warm water , pour a certain amount of H 2 o 2 , at this time the color of the solution turned bright yellow, filtered while hot, fully washed the filter cake with 5% HCl until there was no SO in the filtrate 4 2- (Detected with BaCl solution), anhydrous CaCl at 50°C 2 In the presence of vacuum drying for 24h, graphite oxide powder was obtained.

[0032] (2) Preparation of europium nitrate: 0.1 g of europium oxide was added...

Embodiment 2

[0036] (1) Preparation of graphite oxide: same as Example 1.

[0037] (2) Preparation of Europium Nitrate: Same as Example 1.

[0038] (3) Preparation of graphene / europium oxide composite material: 0.5 g of graphite oxide was dispersed into 400 ml of distilled water, and ultrasonically oscillated for 30 min to obtain a fully dispersed graphene oxide dispersion. Then add 0.029g of europium nitrate and continue ultrasonication for 30min. At this time, europium nitrate is completely dispersed in the graphene oxide solution; reflux reaction at 100°C for 24h, and graphite oxide / europium hydroxide composite material is obtained at this time. Then 5g of sodium borohydride was added and reacted at 80°C for 2h, the product was filtered, washed repeatedly with anhydrous methanol and distilled water, and vacuum-dried at 50°C for 24h to obtain a graphene / europium hydroxide composite material. Finally, it was calcined at a high temperature of 500° C. for 4 hours to obtain a graphene / europ...

Embodiment 3

[0041] (1) Preparation of graphite oxide: same as Example 1.

[0042] (2) Preparation of Europium Nitrate: Same as Example 1.

[0043] (3) Preparation of graphene / europium oxide composite material: 0.5 g of graphite oxide was dispersed into 400 ml of distilled water, and ultrasonically oscillated for 30 min to obtain a fully dispersed graphene oxide dispersion. Then add 0.044g of europium nitrate and continue ultrasonication for 30min. At this time, europium nitrate is completely dispersed in the graphene oxide solution; reflux reaction at 100°C for 24h, and graphite oxide / europium hydroxide composite material is obtained at this time. Then add 5g of sodium borohydride, react at 80°C for 2h, filter the product, repeatedly wash with anhydrous methanol and distilled water, and vacuum dry at 50°C for 24h to obtain a graphene / europium hydroxide composite material. Finally, it was calcined at a high temperature of 500° C. for 4 hours to obtain a graphene / europium oxide composite m...

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Abstract

The invention provides a graphene / europium oxide photoelectric composite material, which belongs to the technical field of composite materials. Water is used as a medium and graphite oxide and europium nitrate are used as the precursor of the graphene and the europium oxide, chemical bonding of europium ion and the hydroxyl on the surface of the graphene oxide are carried out to enable europium hydroxide to be uniformly coated on the surface of the graphene oxide, then the graphene oxide is reduced to the graphene through sodium borohydride, and the graphene is calcinated at high temperature of 500 DEG C for four hours to obtain a graphene / Eu2O3 (europium oxide) composite material. The composite material prepared by the invention combines excellent optical and electrical properties, has high thermal stability, solves the problem of worse optical property of the graphene, and also explores a novel field for the application of the graphene in the aspect of photoelectric devices. The invention has the advantages of simple process, mild reaction condition, no pollution, low production cost and high production efficiency, is convention to operate, and has good prospects in industrialized production.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of graphene / metal oxide, in particular to a graphene / Eu 2 o 3 Composite material, the present invention also relates to a preparation method of graphene / other rare earth metal oxide composite material. Background technique [0002] Since the discovery of graphene in 2004, it has aroused a research boom all over the world, and people have invested a lot of energy to explore the properties of this novel material. So far, graphene has been found to have many peculiar properties in terms of light, electricity, and magnetism. It is the thinnest, hardest, and best conductive material known so far. It can be used to prepare electrodes, composite materials, batteries, supercapacitors, hydrogen storage materials, field emission materials and ultra-sensitive sensors for organic photoelectric devices. materials etc. Graphene has excellent electrical proper...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01B1/00
Inventor 莫尊理赵永霞刘鹏伟郭瑞兵冯超高倩
Owner NORTHWEST NORMAL UNIVERSITY
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