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Two-dimensional black phosphorus material and preparation method thereof

A technology of black phosphorus and red phosphorus, which is applied in the field of two-dimensional black phosphorus materials and its preparation, can solve the problems of high price and undiscovered sales of two-dimensional black phosphorus materials, and achieve low cost, large market potential, and fast and simple preparation process Effect

Active Publication Date: 2017-08-18
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the market price of bulk black phosphorus materials in China is high (>8000 yuan / g), and the sales of two-dimensional black phosphorus materials have not been found

Method used

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  • Two-dimensional black phosphorus material and preparation method thereof
  • Two-dimensional black phosphorus material and preparation method thereof
  • Two-dimensional black phosphorus material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a two-dimensional black phosphorus material proposed by the present invention comprises the following steps: grinding block black phosphorus, first dissolving the ground block black phosphorus in hot toluene, ultrasonically washing for 1 min, centrifuging for 6 min, and centrifuging The rotation speeds were all 13000 rpm, and then the steps of ultrasonic washing with hot toluene and centrifugation were repeated 3 times; then the centrifuged product was dissolved in acetone, ultrasonically washed for 1 min, and centrifuged for 6 min at 13000 rpm, and then the acetone ultrasonic washing, Centrifuge step 3 times; add N-methylpyrrolidone, ultrasonically peel for 24 hours, centrifuge the material after ultrasonic peeling at a speed of 1600 rpm for 9 minutes, take the supernatant, then centrifuge at a speed of 14000 rpm for 9 minutes, and take the solid material Obtain the mixed material containing two-dimensional black phosphorus; dissolve the mixed ma...

Embodiment 2

[0033] A preparation method of a two-dimensional black phosphorus material proposed by the present invention comprises the following steps: grinding block black phosphorus, first dissolving the ground block black phosphorus in hot toluene, ultrasonically washing for 2 minutes, centrifuging for 4 minutes, centrifuging The rotation speeds were all 14000 rpm, and then the hot toluene ultrasonic washing and centrifugation steps were repeated twice; then the centrifuged product was dissolved in acetone, ultrasonically washed for 2 min, and centrifuged for 4 min at 14000 rpm, and then the acetone ultrasonic washing, Centrifuge twice; add N-methylpyrrolidone, ultrasonically peel for 25 hours, centrifuge the material after ultrasonic peeling at a speed of 1500 rpm for 11 minutes, take the supernatant, then centrifuge at a speed of 13000 rpm for 11 minutes, and take the solid material Obtain a mixed material containing two-dimensional black phosphorus; dissolve the mixed material contai...

Embodiment 3

[0036] The preparation method of a two-dimensional black phosphorus material proposed by the present invention comprises the following steps: grinding the black phosphorus in bulk, first dissolving the ground black phosphorus in hot toluene, ultrasonically washing for 1.5 minutes, centrifuging for 5 minutes, The centrifugation speed is 13500 rpm, then repeat the hot toluene ultrasonic washing and centrifugation steps twice; then dissolve the centrifuged product in acetone, ultrasonically wash for 1.5 min, and centrifuge for 5 min at 13500 rpm, then repeat the acetone ultrasonic Washing and centrifugation steps 3 times; adding N-methylpyrrolidone, ultrasonic stripping for 24.5 hours, centrifuging the material after ultrasonic stripping at a speed of 1550 rpm for 10 min, taking the supernatant, and then centrifuging at a speed of 13500 rpm for 10 min, Take the solid material to obtain a mixed material containing two-dimensional black phosphorus; dissolve the mixed material contai...

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Abstract

Currently, a bulk black phosphorus material has high market price in China, and sale for a two-dimensional black phosphorus material is not found until now. In resent two years, the requirement of scientific research institutions for black phosphorus materials is quickly increased, so that large-scale preparation of two-dimensional black phosphorus materials has great market potential. Furthermore, two-dimensional black phosphorus serving as an excellent substrate can be used for supporting platinum, gold, silver and other noble metal materials to develop catalysts and other black phosphorus downstream products with high activity and selectivity, and has wide application prospects. The invention discloses a two-dimensional black phosphorus material and a preparation method thereof. The preparation method comprises the steps of grinding bulk black phosphorus, washing, adding N-methyl pyrrolidone, performing ultrasonic peeling and differential centrifugation, and washing to obtain the two-dimensional black phosphorus material. The preparation method is quick, simple and convenient, can reduce the preparation time and preparation cost, and has great market potential.

Description

technical field [0001] The invention relates to the technical field, in particular to a two-dimensional black phosphorus material and a preparation method thereof. Background technique [0002] Black phosphorus is the most stable member among the three common phosphorus allotropes (red phosphorus, white phosphorus and black phosphorus). It has a flake structure similar to graphite, but the difference is that the phosphorus atoms in the same layer are not on the same plane, showing a honeycomb wrinkled structure. There is a strong covalent bond in the layer, and a single electron pair is left, so each atom is saturated, and the atoms between the layers are acted by van der Waals force, and the bonding between layers is weaker than that in the layer. Has good electrical conductivity. The research group of Professor Zhang Yuanbo from Fudan University first described the discovery of black phosphorus two-dimensional semiconductor materials and prepared field effect transistor ...

Claims

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Application Information

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IPC IPC(8): C01B25/02
Inventor 华健张文博王梦琳曾杰
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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