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
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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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