Method for preparing reduced-oxidized graphene/Cu2O/Cu quantum dot ternary wave-absorbing material

A technology of wave absorbing materials and quantum dots, applied in chemical instruments and methods, nanotechnology for materials and surface science, and other chemical processes, etc. and other problems, to achieve the effect of good absorbing performance, simple preparation method and wide absorbing frequency.

Active Publication Date: 2013-09-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes a reduced graphene oxide / Cu 2 The preparation method of O / Cu quantum dot ternary wave-absorbing material overcomes the shortcomings of harsh preparation conditions, complicated process, long time, difficulty in large-scale production, and poor wave-absorbing performance in the preparation of composite wave-absorbing materials in the above literature

Method used

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  • Method for preparing reduced-oxidized graphene/Cu2O/Cu quantum dot ternary wave-absorbing material
  • Method for preparing reduced-oxidized graphene/Cu2O/Cu quantum dot ternary wave-absorbing material
  • Method for preparing reduced-oxidized graphene/Cu2O/Cu quantum dot ternary wave-absorbing material

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Experimental program
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Effect test

Embodiment 1

[0024] 1. Prepare a GO aqueous solution with a concentration of 0.5mg / ml, according to the mass ratio GO: CuCl 2 ·2H 2 O=1: 0.66, weigh out 66mg CuCl 2 ·2H 2 O, add to 200ml GO aqueous solution, stir for 30min, ultrasonic for 30min;

[0025] 2. According to the mass ratio GO: NaBH 4 =1∶10, weigh out 1g NaBH 4 Dissolve in 50ml water, drip into the mixed solution, react for 3h at room temperature;

[0026] 3. The obtained black precipitate is washed twice with deionized water by centrifugal washing method, and dried under vacuum at 60℃. The obtained black powder is RGO / Cu 2 O / Cu ternary composite material.

[0027] The XRD spectrum of the product of Example 1 is shown in figure 1 . The powder product in Example 1 and the solid paraffin were uniformly mixed according to the mass ratio of 1:1, and pressed in a special mold into a coaxial sample with an outer diameter of 7.00mm, an inner diameter of 3.04mm, and a thickness of about 3mm. The HP8720ES vector was used. The network analyzer ...

Embodiment 2

[0030] 1. Prepare a GO aqueous solution with a concentration of 0.5mg / ml, according to the mass ratio GO: CuCl 2 ·2H 2 O=1:1.33, weigh 133mg CuCl 2 ·2H 2 O, add to 200ml GO aqueous solution, stir for 30min, ultrasonic for 30min;

[0031] 2. According to the mass ratio GO: NaBH 4 =1∶10, weigh out 1g NaBH 4 Dissolve in 50ml water, drip into the mixed solution, react for 3h at room temperature;

[0032] 3. The obtained black precipitate is washed twice with deionized water by centrifugal washing method, and dried under vacuum at 60℃. The obtained black powder is RGO / Cu 2 O / Cu ternary composite material.

[0033] The XRD spectrum of the product of Example 2 is shown in figure 1 . The powder product in Example 1 and the solid paraffin were uniformly mixed according to the mass ratio of 1:1, and pressed in a special mold into a coaxial sample with an outer diameter of 7.00mm, an inner diameter of 3.04mm, and a thickness of about 3mm. The HP8720ES vector was used. The network analyzer test...

Embodiment 3

[0035] 1. Prepare a GO aqueous solution with a concentration of 0.5mg / ml, according to the mass ratio GO: CuCl 2 ·2H 2 O=1: 2.66, weigh 266mg CuCl 2 ·2H 2 O, add to 200ml GO aqueous solution, stir for 30min, ultrasonic for 30min;

[0036] 2. According to the mass ratio GO: NaBH 4 =1∶10, weigh out 1g NaBH 4 Dissolve in 50ml water, drip into the mixed solution, react for 3h at room temperature;

[0037] 3. The obtained black precipitate is washed twice with deionized water by centrifugal washing method, and dried under vacuum at 60℃. The obtained black powder is RGO / Cu 2 O / Cu ternary composite material.

[0038] The XRD spectrum of the product of Example 3 is shown in figure 1 . The powder product in Example 1 and the solid paraffin were uniformly mixed according to the mass ratio of 1:1, and pressed in a special mold into a coaxial sample with an outer diameter of 7.00mm, an inner diameter of 3.04mm, and a thickness of about 3mm. The HP8720ES vector was used. The network analyzer tes...

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Abstract

The invention relates to a method for preparing a reduced-oxidized graphene/Cu2O/Cu quantum dot ternary wave-absorbing material. By taking sodium borohydride as a reducing agent, the RGO/Cu2O/Cu ternary composite wave-absorbing material is prepared by employing a simple wet chemistry method. The Cu2O and Cu have the size of less than 5nm and are directly loaded on an RGO nanosheet. The preparation method is simple and rapid, the compounding process is short in time consumption (only 4-6 hours), the preparation process is simple, the preparation conditions are easily realized, and large-scale production can be realized, and moreover, the large-scale production can be realized, the prepared composite material is good in wave-absorbing performance, and different wave bands can be effectively absorbed by adjusting the addition ratio of the GO and Cu<2+> and the thickness of the composite material.

Description

Technical field [0001] The invention belongs to a preparation method of a ternary composite microwave absorbing material, and specifically relates to a reduced graphene oxide / Cu 2 Preparation method of O / Cu quantum dot ternary wave absorbing material. Background technique [0002] With the continuous development of military technology, modern detection and guidance technologies such as radar, laser, and infrared have been widely used in weapon systems. The survival of aircraft, ships and other weapon systems has been greatly threatened. Microwave absorbing materials can improve the survival of weapon systems. Penetration and deep strike capabilities. In addition, with the widespread application of electromagnetic technology, electromagnetic pollution has gradually threatened the accuracy of electronic instruments and human health. Based on the above reasons, microwave absorbing materials have received extensive attention from domestic and foreign researchers. [0003] The documen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00B82Y30/00
Inventor 黄英宗蒙罗迪迪王慎强张娜郑江波曲春昊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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