Multilayer stable black phosphorene and preparation method

A black phosphorene, stability technology, applied in the preparation of phosphorus, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems that limit the preparation and industrial application of black phosphorene, and achieve low cost, crystal Structural stability, slow down the effect of degradation

Inactive Publication Date: 2017-01-25
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has a fatal flaw. When exposed to water and oxygen, the black phosphorus layer will be oxidized and degraded in a very short time, and the thinner the black phosphorus layer is, the easier it is to degrade.
This defect greatly limits the preparation and industrial application of black phosphorene

Method used

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  • Multilayer stable black phosphorene and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step A, liquid phase stripping of black phosphorus:

[0034] Black phosphorus powder, ethanol, and sodium carboxylate are prepared into a dispersion liquid in a reaction kettle by magnetic stirring at a mass ratio of 100:300:3, and then the ultrasonic probe of the ultrasonic pulverizer is placed in the reaction kettle, and nitrogen gas is introduced. Ultrasonic vibration treatment was performed for 30 minutes in a nitrogen-protected environment, and the black phosphorus was peeled off into black phosphorene through ultrasonic cavitation, which was then filtered and dried;

[0035] Step B, grinding modification:

[0036] Mix the dry black phosphorene obtained in step A with ethylenediaminetetraacetic acid and benzoyl chloride at a mass ratio of 100:10:2 and add them to a drum mill with steel balls as the grinding medium, and grind at low temperature for 30 minutes under a nitrogen protection environment , so that black phosphorene is fully combined with ethylenediamine ...

Embodiment 2

[0041] Step A, liquid phase stripping of black phosphorus:

[0042] Add black phosphorus powder to ethanol, add an appropriate amount of surfactant sodium sulfonate and prepare a dispersion liquid by high-speed stirring, then put the ultrasonic probe of the ultrasonic pulverizer into the agitator, and perform ultrasonic vibration treatment for 30 minutes in a nitrogen-protected environment , the black phosphorus is stripped into black phosphorene by ultrasonic cavitation, and then filtered and dried;

[0043] Step B, grinding modification:

[0044] Mix the dry black phosphorene obtained in step A with diethylenetriaminepentaacetic acid and acrylamide in a mass ratio of 100:10:6) and add it to the grinder, and grind it at low temperature for 60 minutes under nitrogen protection environment to make black phosphorene Fully combined with diethylenetriaminepentaacetic acid, making it difficult to generate superoxide anions, thus hindering the degradation of black phosphorene;

[...

Embodiment 3

[0049] Step A, liquid phase stripping of black phosphorus:

[0050]Add black phosphorus powder to ethanol, add an appropriate amount of surfactant phosphate salt, and prepare a dispersion liquid by high-speed stirring, then put the ultrasonic probe of the ultrasonic pulverizer into the agitator, and perform ultrasonic vibration treatment in a nitrogen-protected environment 10min, the black phosphorus is stripped into black phosphorene by ultrasonic cavitation, and then filtered and dried;

[0051] Step B, grinding modification:

[0052] Mix the dry black phosphorene obtained in step A with citric acid and the stabilizer trichloroacetyl chloride in a mass ratio of 100:20:2 and add them to a conical grinder, and grind at a low temperature for 30 minutes under a nitrogen protection environment to make black phosphorene and The citric acid is fully combined, making it difficult to generate superoxide anions, thereby hindering the degradation of black phosphorene;

[0053] Step C...

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Abstract

The invention belongs to the field of novel two-dimensional materials, and in particular relates to multilayer stable black phosphorene and a preparation method. The reaction of the black phosphorene and oxygen is hindered by chelating of a chelating agent and stable modification of a stabilizer, so that superoxide anions are more difficult to generate, thereby greatly reducing the degradation of black phosphorus in an environment. Further, the multilayer stable black phosphorene is obtained by encapsulating elemental sulfur. According to the method, a stable crystal structure of the black phosphorus is guaranteed; meanwhile, service requirements are met; the thickness of the obtained black phosphorene is between 10nm and 20nm. The multilayer stable phosphorene and the preparation method have a wide important application prospect in the fields such as transistors, sensors, solar cells, switches, battery electrodes and the like.

Description

technical field [0001] The invention belongs to the field of novel two-dimensional materials, and in particular relates to a stable multilayer black phosphorene and a preparation method thereof. Background technique [0002] Black phosphorus is a crystal with metallic luster, which is formed by the transformation of white phosphorus under high pressure and temperature. It has a sheet structure similar to graphite and has good electrical conductivity. New two-dimensional semiconductor materials. In particular, compared with graphene, few-layer black phosphorus microchips have more obvious advantages in the application of optoelectronic materials. [0003] Two-dimensional black phosphorus is a new two-dimensional crystal discovered in early 2014. Since two-dimensional black phosphorus exhibits excellent properties in terms of both electron mobility and on-off ratio, it is considered to be next to graphene and monolayer molybdenum disulfide (MoS2) in thin-film electronic opti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/02B82Y30/00
CPCC01B25/02B82Y30/00C01P2004/03
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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