Two-dimensional ultrathin ferric diselenide nano material as well as preparation method and application thereof

A technology of iron diselenide and nanomaterials, applied in the direction of binary selenium/tellurium compounds, nanotechnology, nanotechnology, etc., can solve problems such as limitations, and achieve the effect of simple operation steps and good application prospects

Active Publication Date: 2015-04-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although iron diselenide can be synthesized by the above methods, these synthesis methods are difficult to synthesize FeSe w

Method used

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  • Two-dimensional ultrathin ferric diselenide nano material as well as preparation method and application thereof
  • Two-dimensional ultrathin ferric diselenide nano material as well as preparation method and application thereof
  • Two-dimensional ultrathin ferric diselenide nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A preparation method of ultra-thin iron diselenide nanosheets, the steps are as follows:

[0046] 1) Mix 1.0 mmol of selenium powder and 1.0 ml of oleylamine, stir for 5 minutes under the protection of nitrogen, then add 2.5 ml of 1-dodecanethiol, continue stirring for 5 minutes, the black selenium powder is completely dissolved, and the solvent changes from colorless to transparent into a brown solution;

[0047]2) Mix 0.5 mmol of iron acetylacetonate with 10 ml of oleylamine, vacuumize to remove water and oxygen, stir magnetically, heat to 80°C under temperature control and maintain for 30 minutes to fully dissolve the reaction precursor, and then pass the entire reaction system into Protective gas until the end of the reaction;

[0048] 3) Inject the Se source prepared in step 1) into the system in step 2) with a syringe, and heat to 220° C. and maintain it for 30 minutes;

[0049] 4) After the reaction is finished, the product is obtained by centrifugation and was...

Embodiment 2

[0053] The steps are the same as in Example 1, except that the oleylamine in the step (1) of Example 1 is replaced by hexadecylamine to obtain two-dimensional FeSe 2 Flake nanomaterials. Figure 5 It is a transmission electron micrograph of the prepared material, and it can be seen from the figure that the obtained material is still a two-dimensional sheet.

Embodiment 3

[0055] The steps are the same as in Example 1, except that the 1-dodecanethiol in the step (1) of Example 1 is replaced by 1-hexadecanthiol to obtain two-dimensional FeSe 2 Flake nanomaterials. Figure 6 Scanning electron micrographs of the prepared materials.

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Abstract

The invention relates to a two-dimensional ultrathin ferric diselenide nano material as well as a preparation method and an application thereof. The nano material is 0.5-5 microns in size and 3-7nm thick; the nano material is prepared by the following steps: mixing Se powder with a solvent, adding a certain amount of thiol and stirring for 1-5min in the atmosphere of inert gas so as to obtain a high-activity Se precursor; dissolving an inorganic solvent of iron to an oleylamine solvent, injecting the Se precursor at a certain temperature, and reacting for a certain duration in the atmosphere to the inert gas so as to obtain the ultrathin ferric diselenide nano material, wherein the ultrathin ferric diselenide nano material can be used for preparing the counter electrode of a dye-sensitized cell. Compared with the prior art, the ferric diselenide prepared by the invention is controllable in morphology, and is simple to operate, good in repeatability, low in cost and prone to large-scale production.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, and in particular relates to a two-dimensional ultrathin iron diselenide nanometer material and its preparation method and application. Background technique [0002] Selenide semiconductor nanomaterials have been a research hotspot in recent years. The physical and chemical properties of nano-inorganic materials are not only related to their size but also to their shapes. Therefore, the controlled synthesis of materials has attracted great interest from researchers. A large number of The research work also achieves the purpose of adjusting its properties by controlling the shape (including shape, size, and microstructure) of the material. [0003] The traditional synthesis of metal chalcogenides usually uses the method of direct combination of elements in a high temperature, vacuum quartz tube. Since the diffusion rate of elements in the solid phase reaction is very slow, the rea...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y30/00H01G9/20H01G9/042
CPCY02E10/542
Inventor 宰建陶黄守双钱雪峰何青泉梁娜徐淼祝奇陈文龙王敏李波李晓敏刘雪娇刘园园
Owner SHANGHAI JIAO TONG UNIV
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