Graphene and ferrum diselenide composite material and method for preparing same

A technology of iron diselenide and composite materials, applied in the direction of binary selenium/tellurium compounds, chemical instruments and methods, carbon compounds, etc., to achieve the effects of low production cost, high specific surface area, and simple preparation process

Inactive Publication Date: 2013-02-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite material of nanometer iron diselenide and graphene has not been reported yet.

Method used

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  • Graphene and ferrum diselenide composite material and method for preparing same
  • Graphene and ferrum diselenide composite material and method for preparing same
  • Graphene and ferrum diselenide composite material and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Put 0.5mmol sodium selenite pentahydrate and 1mmol ferrous sulfate into a 50mL polytetrafluoroethylene-lined stainless steel reaction kettle, add 6mL hydrazine hydrate and 10mL graphene oxide solution (water / ethylene glycol volume ratio 1 / 4) and mix them evenly, put them into the above reaction kettle, close and tighten the reaction kettle to make it airtight; put it in an oven, set the temperature at 180°C, take out the reaction kettle after 12 hours of reaction, and let it naturally Cool down; then pour out the reaction precipitate, wash it with distilled water three times, then wash it with absolute ethanol three times; finally dry it in a vacuum oven at 60°C for 8 hours, collect samples and store them in a desiccator.

[0040] The XRD figure of the graphene / iron diselenide composite material prepared by the present embodiment is as follows figure 1 shown by figure 1 It can be seen that the obtained powder contains orthorhombic FeSe 2 (JCPD No.82-0269), the crystal...

Embodiment 2

[0042] Put 1mmol of sodium selenite pentahydrate and 0.5mmol of ferrous ammonium sulfate into a 50mL Teflon-lined stainless steel reaction kettle, add 8mL of hydrazine hydrate and 15mL of graphene oxide solution (water / ethylene glycol volume ratio of 1 / 4) and mix them evenly, put them into the above reaction kettle, close and tighten the reaction kettle to make it airtight; put it in an oven, set the temperature at 120°C, take out the reaction kettle after 15 hours of reaction, and make it Cool naturally; then pour out the reaction precipitate, first wash three times with distilled water, then wash three times with absolute ethanol; finally dry in a vacuum oven at 60°C for 7 hours, collect samples and store them in a desiccator.

[0043] Figure 6 The TEM figure of the sample prepared for this embodiment, this figure shows the rod-shaped FeSe prepared as a result 2 Evenly dispersed on graphene, its length is 20nm ~ 150nm; a single FeSe 2 HRTEM image of nanorods ( Figure 7 ...

Embodiment 3

[0045] Put 0.5mmol sodium selenite pentahydrate and 1mmol ferrous sulfate into a 50mL polytetrafluoroethylene-lined stainless steel reaction kettle, add 8mL hydrazine hydrate and 20mL graphene oxide solution (water / ethylene glycol volume ratio 1 / 4) and mix them evenly, put them into the above reaction kettle, close and tighten the reaction kettle to make it airtight; put it in an oven, set the temperature at 180°C, take out the reaction kettle after 12 hours of reaction, and let it naturally Cool down; then pour out the reaction precipitate, wash it with distilled water three times, then wash it with absolute ethanol three times; finally dry it in a vacuum oven at 60°C for 8 hours, collect samples and store them in a desiccator.

[0046] In the prepared composite material, FeSe 2 It is in the shape of spherical particles, which are relatively uniformly distributed on the graphene sheet, and the average particle size is 100nm-400nm.

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Abstract

The invention discloses a graphene and ferrum diselenide composite material and a method for preparing the same. The method for preparing comprises the following steps: selenium-containing inorganic salt and ferrum-containing inorganic salt are put into a stainless steel reactor; hydrazine hydrate and source graphene solution are mixed together and stirred uniformly to form an ink black solution to be added into the reactor, and the reactor is closed so as to carry out reaction; and after the reaction is completed, natural cooling is carried out, reaction precipitate is subjected to repeated washing and suction filtering through distilled water and absolute ethyl alcohol, and after the drying, the product is collected and stored in a drying device. According to the prepared graphene and ferrum diselenide composite material, a graphene sheet wraps ferrum diselenide nanoparticles, the ferrum diselenide is tightly combined with the graphene sheet, so that high specific surface area and excellent magnetic performance are obtained. The method adopts a simple hydrothermal method, the graphene reduction oxide and the composite preparation of the praphene and the ferrum diselenide can be synchronously carried out, and the method has the advantages of simplicity in technology, low reaction temperature, low cost, green, controllability and applicability for industrial production.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a graphene-iron diselenide composite material and a preparation method thereof; belonging to the field of inorganic nanocomposite materials. Background technique [0002] After Poizot et al. reported the lithium electrochemical behavior of transition metal oxide materials in Nature in 2000, transition metal compounds were considered as new materials with potential energy storage. Selenide P-type semiconductor nanomaterials show a strong quantum confinement effect due to their large exciton Bohr radius, which is more conducive to obtaining some novel properties in semiconductor optics, electricity, and mechanics. At present, there are relatively few studies on selenide, and the semiconductor nanomaterial iron diselenide (FeSe 2 ) has the advantages of narrow band gap (1.0eV), high electronic conductivity, high specific capacity, etc., and has very important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04C01B31/04B82Y30/00C01B32/194
Inventor 高濂宋雪峰张鹏
Owner SHANGHAI JIAO TONG UNIV
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