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Graphene and nickel diselenide composite and preparation method thereof

A technology of nickel diselenide and composite materials, which is applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, and achieves the effects of simple preparation process, rich source of raw materials and high specific surface area

Inactive Publication Date: 2016-02-03
JIANGNAN GRAPHENE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The composite material of nano-nickel diselenide and graphene has not been reported

Method used

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  • Graphene and nickel diselenide composite and preparation method thereof
  • Graphene and nickel diselenide composite and preparation method thereof
  • Graphene and nickel diselenide composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Mix 5 mL of hydrazine hydrate with 10 mL of graphene oxide aqueous solution with a concentration of 0.1 mg / ml, stir evenly to form a brown solution, and then add it to a polytetrafluoro-lined stainless steel reactor. Fill 1 mmol sodium selenite and 0.5 mmol nickel sulfate In the above reaction kettle, close and tighten the reaction kettle to make it airtight; put it in an oven, set the temperature at 100℃, take out the reaction kettle after 0.5h reaction, let it cool naturally, filter the mixture in the reaction kettle, and use distilled water Repeated washing and suction filtration with absolute ethanol, and finally drying in a vacuum oven at 40°C for 0.5h, collecting samples and storing them in a desiccator.

[0043] figure 1 with figure 2 SEM and TEM images of the samples prepared in this example. It can be seen from the figure that the prepared nickel diselenide is spherical particles, which are relatively uniformly distributed on the graphene sheet, with an average p...

Embodiment 2

[0045] Mix 1mL of hydrazine, 1mL of dimethylhydrazine, 1mL of vitamin C, 2mL of hydrogen iodide with 50mL of graphene oxide aqueous solution with a concentration of 20mg / ml, stir evenly to form a dark brown solution, and then add it to a Teflon-lined stainless steel reactor. Put 1mmol potassium selenite, 0.2mmol nickel nitrate, 0.3mmol nickel perchlorate into the above reaction kettle, close and tighten the reaction kettle to make it airtight; put it in the oven, set the temperature at 250℃, react for 72h Take out the reaction kettle and let it cool naturally. The mixture in the reaction kettle is suction filtered, washed and filtered repeatedly with distilled water and absolute ethanol, and finally dried in a vacuum oven at 100°C for 24 hours. The samples are collected and stored in a desiccator.

Embodiment 3

[0047] Mix 2mL sodium borohydride, 2mL formaldehyde, 2mL acetaldehyde, 2mL hydroquinone, 2mL p-phenylenediamine and 10mL graphene oxide aqueous solution with a concentration of 1mg / ml, stir evenly to form a dark brown solution, and then add to the polytetrafluoroethylene In a stainless steel reactor lining, put 1.5mmol elemental selenium and 0.5mmol nickel oxalate into the above reactor, close and tighten the reactor to make it sealed; put it in the oven, set the temperature at 150℃, take it out after reacting for 24h The reaction kettle was allowed to cool naturally, the mixture in the reaction kettle was suction filtered, washed and filtered repeatedly with distilled water and absolute ethanol, and finally dried in a vacuum oven at 60°C for 12 hours. The samples were collected and stored in a desiccator.

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Abstract

The invention discloses a graphene and nickel diselenide composite and a preparation method thereof. The preparation method comprises the steps that a reducing agent is mixed with a graphene oxide solution, even stirring is conducted to form a brown solution, the brown solution is added into a stainless steel reaction kettle with a polytetrafluoroethylene liner, and selenium containing matter and nickel containing inorganic salt are filled into the reaction kettle; the reaction kettle is closed to conduct the reaction; after the reaction is conducted, natural cooling is conducted, suction filtration is conducted on a mixture in the reaction kettle, repeated washing and suction filtration are conducted through distilled water and absolute ethyl alcohol, and the product is collected for storing after drying is conducted. According to the prepared graphene and nickel diselenide composite, nickel diselenide nanoparticles are wrapped with the graphene, nickel diselenide is closely combined with graphene sheets, and the composite has larger specific surface area. According to the graphene and nickel diselenide composite and the preparation method thereof, a simple solvothermal method is adopted, reduction of graphene oxide and preparation of the graphene oxide and the nickel diselenide composite are conducted synchronously, the technology is simple, the reaction temperature is low, the cost is low, the preparation method is green and controllable, and the graphene and nickel diselenide composite is suitable for industrial production.

Description

Technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a graphene and nickel diselenide composite material and a preparation method thereof; it belongs to the field of inorganic nano composite materials. Background technique [0002] As a semiconductor material, nickel selenide has shown broad application prospects in the fields of optical recording materials, solar cells, sensors, laser materials, and optical fibers due to its unique electrical and magnetic properties. At present, there are relatively few studies on selenide. Semiconductor nickel diselenide nanomaterials have the advantages of narrow band gap, high electronic conductivity, high specific capacity, unique electrical and magnetic properties, etc. As a good electrical conductor and Pauli paramagnetic material, nickel diselenide is a weak paramagnetic material and its magnetic susceptibility changes little with temperature. It has very important researc...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y30/00
Inventor 李修兵
Owner JIANGNAN GRAPHENE RES INST
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