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Black phosphorene aerogel and preparation method thereof

A technology of airgel and black phosphorene, applied in chemical instruments and methods, phosphorus, phosphorus compounds, etc., can solve the problems of composite airgel performance impact, oxidation or destruction of black phosphorus nanosheets, complex preparation process, etc. Achieve excellent photothermal characteristics, novel and simple technical solutions, and excellent adsorption performance

Active Publication Date: 2018-05-25
HUBEI MOPHOS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process is relatively complicated, and the aqueous solution used may oxidize or destroy the black phosphorus nanosheets, and the residual reducing agent will have a certain impact on the performance of the composite airgel.

Method used

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  • Black phosphorene aerogel and preparation method thereof
  • Black phosphorene aerogel and preparation method thereof
  • Black phosphorene aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Take 2mg of black phosphorus nanosheets with an average size of 3μm and an average thickness of 2nm and ultrasonically disperse them in 5mL of cyclohexane. ℃ for 2 hours, followed by freeze-drying, the freeze-drying temperature is -80°C, the vacuum degree is 0.01mbar, and the freeze-drying time is 12 hours, and the black phosphorene airgel can be obtained.

[0037] The photothermal conversion efficiency of the prepared airgel is 8%, and the density is 1.0 mg / cm 3 , with a porosity of 85% and a specific surface area of ​​500m 2 / g.

[0038] in, figure 1 It is a physical digital photo of the black phosphorene airgel prepared in this example. It can be seen that the black phosphorene airgel has a fluffy structure and a large volume, and has a three-dimensional network structure. figure 2 It is a microscope photo of the black phosphorene airgel prepared in this example. It can be seen that the black phosphorene airgel has a fluffy structure, a large number of pores, and ...

Embodiment 2

[0042] Take 0.5 mg of black phosphorus nanosheets with an average size of 5 μm and an average thickness of 1 nm and ultrasonically disperse them in 6 mL of cyclohexane, wherein the ultrasonic time is 12 min, and the ultrasonic power is 100 W, then stand at room temperature for 10 min; then place at 0 ℃ for 3 hours, followed by freeze-drying. The freeze-drying temperature is -20°C, the vacuum degree is 0.1 mbar, and the freeze-drying time is 24 hours to obtain the black phosphorus aerogel.

[0043] The photothermal conversion efficiency of the prepared black phosphorene airgel is 20%, and the density is 0.5 mg / cm 3 , the porosity is 91%, and the specific surface area is 1000m 2 / g.

Embodiment 3

[0045] Take 5 mg of black phosphorus nanosheets with an average size of 0.5 μm and an average thickness of 2 nm and ultrasonically disperse them in 20 mL of cyclohexane, where the ultrasonic time is 5 min and the ultrasonic power is 1000 W, then stand at room temperature for 60 min; then place in- Freezing at 60°C for 5 hours, followed by freeze-drying, the freeze-drying temperature is -50°C, the vacuum degree is 1mbar, and the freeze-drying time is 3 hours to obtain the black phosphorus aerogel.

[0046] The prepared black phosphorene airgel has a photothermal conversion efficiency of 10% and a density of 5.1 mg / cm 3 , with a porosity of 79% and a specific surface area of ​​600m 2 / g.

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Abstract

The invention discloses black phosphorene aerogel as well as a preparation method and application thereof. The aerogel is inorganic aerogel being of a three-dimensional network structure, and is prepared by means of freeze drying on two-dimensional black phosphorus nanosheets which are dispersed in an organic solvent under ultrasonic assistance. Compared with the conventional aerogel preparation method, the preparation method has the advantage that the aerogel can be formed by means of self-crosslinking assembly among two-dimensional black phosphorus nanosheet layers without use of any chemical crosslinking agent. The preparation process is simple in steps, is convenient to operate, is short in time and efficient, and does not cause pollution on the environment and the material surface. The black phosphorene aerogel has lower density, higher porosity, larger specific surface area and higher photothermal conversion characteristic. The prepared black phosphorene aerogel brings the superior characteristics of black phosphorene and aerogel into full play, and has a very high application prospect in the field of adsorption and energy storage materials.

Description

technical field [0001] The invention relates to the field of airgel materials, in particular to a black phosphorene airgel and a preparation method thereof Background technique [0002] As a new type of porous structure material, airgel has excellent characteristics such as low density, rich pore structure and high specific surface area, so it has been widely used in chemical engineering, biomedicine, aerospace, military transportation and other fields. Wide range of applications. Since the discovery of silica aerogels, various new material aerogels have emerged, such as aluminum oxide aerogels, titanium carbide aerogels, and graphene aerogels. [0003] In recent years, a new type of direct bandgap two-dimensional semiconductor material - black phosphorene, has become a research hotspot. Compared with other two-dimensional materials, black phosphorene has many unique advantages. For example, the bandgap (0.3-2.0eV) of black phosphorene can be adjusted in a wide range by t...

Claims

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Application Information

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IPC IPC(8): C01B25/00B01J20/02B01J20/30B01J20/28H01G11/30H01M4/38H01M10/0525
CPCB01J20/02B01J20/28047C01B25/003C01P2006/10C01P2006/12H01G11/30H01M4/38H01M10/0525Y02E60/10
Inventor 喻学锋黄浩高明刘丹妮
Owner HUBEI MOPHOS TECH CO LTD
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