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Graphene/amorphous carbon nanotube/nickel-cobalt sulfide composite hybrid material and preparation method thereof

A technology of nickel-cobalt sulfide and hybrid materials, applied in chemical instruments and methods, and other chemical processes, can solve problems such as interference with the normal operation of electronic diagnostic and therapeutic instruments and delays, and achieve good electrical conductivity, high reflectivity, and good electromagnetic performance effect

Inactive Publication Date: 2019-07-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the airport, flights are delayed due to electromagnetic interference; in hospitals, mobile phones often interfere with the normal work of various electronic medical instruments

Method used

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  • Graphene/amorphous carbon nanotube/nickel-cobalt sulfide composite hybrid material and preparation method thereof
  • Graphene/amorphous carbon nanotube/nickel-cobalt sulfide composite hybrid material and preparation method thereof
  • Graphene/amorphous carbon nanotube/nickel-cobalt sulfide composite hybrid material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1～ Embodiment 4

[0025] Step 1, preparation of nickel cobalt sulfide, graphene oxide and amorphous carbon nanotubes:

[0026] 1. Preparation of nickel-cobalt sulfide: Mix nickel sulfate, cobalt sulfate, trisodium citrate and urea to obtain a mixed solution, and then place it in a high-pressure hydrothermal reactor at 120-150°C for 4-6 hours to obtain a red precursor Powder; then mix the precursor and sodium sulfide in the ratio of (1-3):(1-12), add 20-35ml of deionized water to form a mixed solution, and place it in a high-pressure hydrothermal reaction kettle at 120-170°C 30-50hrs, after washing and drying, nickel-cobalt sulfide is obtained;

Embodiment 1

[0027] Embodiment 1: the ratio of nickel sulfate, cobalt sulfate, trisodium citrate and urea is 1:2:2:12; Obtain the scanning photo of nickel cobalt sulfide as figure 1 as shown in a;

Embodiment 2

[0028] Embodiment 2: the ratio of nickel sulfate, cobalt sulfate, trisodium citrate and urea is 4:2:2:12; Obtain the scanning photograph of nickel cobalt sulfide as figure 1 as shown in b;

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Abstract

The invention relates to a graphene / amorphous carbon nanotube / nickel-cobalt sulfide composite hybrid material and a preparation method of the graphene / amorphous carbon nanotube / nickel-cobalt sulfide composite hybrid material, and refers to a novel electromagnetic wave absorbing material with high reflectivity and wide absorption frequency band and a preparation method of the novel electromagneticwave absorbing material. The preparation method comprises the following steps: preparing a precursor from nickel sulfate, cobalt sulfate, trisodium citrate and urea as raw materials, then adding sodium sulfide to prepare nickel-cobalt sulfide, preparing a graphene oxide solution by an improved Hummers method, and preparing an amorphous carbon nanotube by a CVD method, finally mixing nickel-cobaltsulfide, the graphene oxide solution and the amorphous carbon nanotube, thereby being capable of obtaining graphene / amorphous carbon nanotube / nickel-cobalt sulfide composite hybrid material through ahydrothermal method. The composite material prepared by the invention has the advantages of sandwich structure, large specific surface area, high electrical conductivity and the like, and can make theabsorbing material have the characteristics of high reflectivity, wide absorption frequency band and the like and greatly improves the absorbing properties of the material.

Description

technical field [0001] The invention belongs to the interdisciplinary research field of material science and electromagnetism, and relates to a graphene / amorphous carbon nanotube / nickel-cobalt sulfide composite hybrid material and a preparation method thereof, and to a kind of material with high reflectivity and wide absorption frequency band The preparation method of the graphene / amorphous carbon nanotube / nickel-cobalt sulfide compound hybrid material, especially relates to the preparation method of the electromagnetic wave absorbing material. Background technique [0002] With the development of science and technology, electromagnetic wave pollution has become the fourth pollution source after air pollution, water pollution and noise pollution. The electromagnetic waves continuously emitted by high-power electromagnetic wave transmitting towers and radio stations to the outside world often cause problems such as communication interference and electronic fog. At the airpor...

Claims

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Application Information

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IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 赵廷凯胡警天彭夏容杨文波党阿磊李昊李铁虎
Owner NORTHWESTERN POLYTECHNICAL UNIV
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