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Large-size black phosphorus slice and preparation method thereof

A technology of large-size black phosphorus flakes, which is applied in the field of large-size black phosphorus flakes and its preparation, can solve the problems of low yield of flake black phosphorus, few black phosphorus flakes, and difficulty in repeating, and achieves low price, simple operation, good reproducibility

Active Publication Date: 2016-05-25
HUBEI MOPHOS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for easy creation of small particles called Black Phospheres (BPs) that are highly pure materials without any impurities like iron oxide from other sources). These BPP's have unique properties making them ideal candidates for various applications including use in photovoltaic cells and sensors. They also allow for easier manufacturing processes by avoiding complicated steps involved when producing these tiny objects.

Problems solved by technology

The technical problem addressed in this patented text relates to finding ways to make larger amounts of black Phosphorus without having its own shape like traditional pigmentary stones.

Method used

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  • Large-size black phosphorus slice and preparation method thereof
  • Large-size black phosphorus slice and preparation method thereof
  • Large-size black phosphorus slice and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A preparation method of large-size black phosphorus sheet, comprising the steps of:

[0047] Add 15mL of dimethyl sulfoxide solution to a 30mL beaker, then add 5mg of black phosphorus, the magnetic stirring speed is 3000 rpm, after stirring for 20h, the resulting mixed solution is centrifuged at 3000rpm for 10min, and the supernatant is taken Then centrifuge at 13000rpm for 10min, and wash the obtained precipitate several times with absolute ethanol to obtain large-sized black phosphorus tablets.

[0048] The product obtained in present embodiment 1 is characterized, and the results are as follows Figure 1 to Figure 4 As shown, among them, figure 1 is the UV-Vis-NIR absorption spectrum of the product, from figure 1 It can be seen from the curve in that the product of Example 1 has absorption in the range of 300-800nm, and its absorption peak is about 330nm; figure 2 For its Raman spectrum, from figure 2 It can be seen from the curve in , at 368cm -1 、446cm -1 a...

Embodiment 2

[0050] A preparation method of large-size black phosphorus sheet, comprising the steps of:

[0051] Add 30mL dimethyl sulfoxide solution to a 50mL beaker, then add 5mg of black phosphorus, the magnetic stirring speed is 3000 rpm, after stirring for 25h, the resulting mixed solution is centrifuged at 3000rpm for 10min, and the supernatant is taken again Centrifuge at 13,000 rpm for 10 min, and wash the resulting precipitate with absolute ethanol several times to obtain large-sized black phosphorus tablets.

Embodiment 3

[0053] A preparation method of large-size black phosphorus sheet, comprising the steps of:

[0054] Add 15mL of dimethyl sulfoxide solution to a 30mL beaker, then add 5mg of black phosphorus, the magnetic stirring speed is 3000 rpm, after stirring for 30h, centrifuge the resulting mixed solution at a speed of 3000rpm for 10min, and take the supernatant Then centrifuge at 13000rpm for 10min, and wash the obtained precipitate several times with anhydrous ethanol to obtain large-sized black phosphorus tablets.

[0055] Figure 5 It is a transmission electron microscope image of the black phosphorus sheet prepared in Example 3 of the present invention. Depend on Figure 5 The resulting product is clearly seen as black phosphorus flakes with lateral dimensions of about 10 μm.

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Abstract

The invention provides a preparation method of a large-size black phosphorus slice. The method comprises the steps of soaking a black phosphorus block body into an organic solvent, and stirring, wherein the rotating speed of stirring is 1000-3000r/min, and the stirring time is 20-30 hours; centrifuging the stirred solution at low speed, collecting supernatant, centrifuging the supernatant at high speed, removing the supernatant, and collecting the solid precipitate, wherein the solid precipitate is the large-size black phosphorus slice. The method is simple in operation, mild in conditions, low in price, good in reproducibility and high in yield; oscillation and ultrasound are not needed in the preparation process, so that low-cost industrial production is easily realized. The large-size black phosphorus slice has the lateral dimension of 5-25 micrometers, thus being able to be applied to the fields such as preparation of a photoelectric device or a sensor, and the like.

Description

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Claims

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Application Information

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Owner HUBEI MOPHOS TECH CO LTD
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