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Method for preparing phosphaalkene

A technology of phosphorene and black phosphorus, which is applied in the field of phosphorene preparation, can solve the problems of long preparation time, uneven size of phosphorene, and low yield of phosphorene, and achieve easy large-scale production, realize large-scale production, and phosphorene The effect of high yield

Active Publication Date: 2015-10-07
延边中电阳光新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of the mechanical exfoliation method is that the preparation time is long, the output is very small, and the large-scale preparation cannot be realized
The liquid phase exfoliation method has at least the following disadvantages: (1) the exfoliation time is long, the chances of contact with air and water are many, and the product quality is unstable; The size is not uniform, and the size of a part of phosphorene is very small, which is difficult for industrial application; (3) the yield of phosphorene is very low, generally lower than 1wt%, and has not yet broken through the technical bottleneck of large-scale preparation

Method used

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Examples

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preparation example Construction

[0021] The method for preparing phosphorene provided by the present invention is described in detail below.

[0022] A method for preparing phosphorene, comprising the steps of:

[0023] Step A, preparing intercalated black phosphorus: disperse the black phosphorus in the dispersion liquid, and ultrasonically treat it for 0.5-200 hours, and then perform solid-liquid separation to obtain the intercalated black phosphorus.

[0024] Wherein, the black phosphorus can adopt at least one of normal black phosphorus, oxidized black phosphorus or eroded black phosphorus, and the phosphorus content is at least 70% (by weight percentage), in practical application , the best distance between black phosphorus sheets is 0.4-2nm, which can facilitate the formation of intercalated black phosphorus and create favorable conditions for the preparation of phosphorene. The dispersion liquid can be at least one of inorganic acid solution, inorganic alkali solution, salt solution, organic solution ...

Embodiment 1

[0037] Add 20mL of dilute phosphoric acid to a 100ml beaker, and add 0.01g of black phosphorus to it, and then place the flask in an ultrasonic device for ultrasonic treatment. The ultrasonic frequency is 15Hz, the power density is 100w, and the treatment time is 72h to obtain intercalation black Phosphorus dispersion; after the ultrasonic treatment is completed, the intercalated black phosphorus dispersion is filtered, and the filtered solid is washed several times with deionized water, and then dried in vacuum at 50°C to constant weight to obtain a solid intercalated black phosphorus.

[0038] Take 100mg of the above-mentioned solid intercalated black phosphorus and add it to 20mL of ammonium perchlorate with a concentration of 0.05g / mL, and place it in an ultrasonic device again for ultrasonic treatment, ultrasonic vibration and dispersion for 72h, ultrasonic frequency 15Hz, power density 100w, and then The obtained suspension was centrifuged at 3000 rpm for 10 min, the sup...

Embodiment 2

[0041] Add 20mL of N,N-dimethylformamide to a 100ml beaker, and add 0.05g of black phosphorus to it, then place the flask in an ultrasonic device for ultrasonic treatment, the ultrasonic frequency is 15Hz, and the power density is 100w. The intercalated black phosphorus dispersion was obtained for 72 hours; after the ultrasonic treatment was completed, the intercalated black phosphorus dispersion was filtered, and the filtered solid was washed several times with absolute ethanol, and then dried in vacuum at 50°C until constant Weight, to obtain solid intercalated black phosphorus.

[0042] Take 100mg of the above-mentioned solid intercalated black phosphorus and add it to 20mL of p-aminoazophenyl alcohol solution with a concentration of 0.05g / mL, and place it in an ultrasonic device again for ultrasonic treatment, ultrasonic vibration and dispersion for 48h, ultrasonic frequency 15Hz, power density 100w , and then the obtained suspension was centrifuged at 3000rpm for 10min, a...

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PUM

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Abstract

The invention discloses a method for preparing phosphaalkene. The method comprises the following steps: dispersing black phosphorus into a dispersion liquid, and performing ultrasonic treatment for 0.5-200 hours and then performing solid-liquid separation to obtain intercalation black phosphorus; dispersing the intercalation black phosphorus into a chemical foaming agent solution, performing ultrasonic treatment for 0.5-200 hours and then performing solid-liquid separation, and drying solids subjected to solid-liquid separation to obtain a solid mixture of black phosphorus and a chemical foaming agent; performing microwave treatment on the solid mixture of black phosphorus and the chemical foaming agent under the microwave powder of 100-1,000W, and preparing a finished product phosphaalkene after 1s-1h of microwave treatment. The phosphaalkene prepared by the method disclosed by the invention is proper and uniform in size; furthermore, the technology is simple, the cost is low, the peeling time is short, and the phosphaalkene yield is high; large-scale production is easy to realize.

Description

technical field [0001] The invention relates to the technical field of phosphorene preparation, in particular to a method for preparing phosphorene. Background technique [0002] Phosphorene is a two-dimensional structural material composed of a single layer or multiple layers of phosphorus atoms, which has excellent electrical properties and an electron mobility as high as 1000 cm 2 / V.s, leakage current modulation rate is 10 of that of graphene 4 ~10 5 times, it is a new type of two-dimensional semiconductor material after graphene and molybdenum disulfide. Compared with graphene, the biggest advantage of phosphorene is that it has an energy gap, and the size of the phosphorene energy gap can be adjusted by changing the number of stacked phosphorus layers, which makes phosphorene easy to detect light, so phosphorene is in the field emission transistor , photoelectric conversion devices, secondary batteries and other aspects have great potential application value. [00...

Claims

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Application Information

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IPC IPC(8): C01B25/02
Inventor 连慧琴崔秀国祖雷
Owner 延边中电阳光新能源科技有限公司
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