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Phosphorene-graphene composite material and preparation method thereof

A graphene composite and composite material technology, which is applied in the preparation of graphene and phosphorus, nanotechnology for materials and surface science, etc. It is difficult to control the quality and other problems, so as to achieve the effect of easy control of product quality, excellent mechanical strength and low equipment requirements.

Inactive Publication Date: 2017-09-19
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing phosphorene-graphene composite materials have a macroscopic structure similar to a film-like sheet structure, so it is difficult to take advantage of its large specific surface area, its physical and chemical adsorption properties are not very ideal, and its mechanical strength is also poor.
The existing preparation methods of phosphorene-graphene composite materials are usually formed by mixing phosphorene and graphene in liquid phase and then drying. The yield is low, the product quality is difficult to control, and the preparation process is cumbersome and difficult to operate.

Method used

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  • Phosphorene-graphene composite material and preparation method thereof

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preparation example Construction

[0024] Specifically, the preparation method of phosphorene-graphene composite material provided by the present invention comprises the following steps:

[0025] Step A, vacuum ball milling phosphorene and graphite oxide, and then adding them into the dispersion liquid for dispersion, so as to obtain a mixed suspension of phosphorene and graphite oxide.

[0026] Specifically, phosphorene and graphite oxide are vacuum ball milled together for 0.1 to 48 hours, and then added to the dispersion liquid for ultrasonic dispersion. The ultrasonic dispersion time is 10 to 240 minutes, thereby obtaining phosphorene and graphite oxide. The concentration of graphite mixed together is a mixed suspension of 0.1 to 100g / L. Wherein, the amount of phosphorene accounts for 10% to 90% of the total amount of phosphorene and graphite oxide, the degree of oxidation of graphite oxide is 10% to 90%, and the dispersion liquid is water, methanol, ethanol, acetone, ether , carbon tetrachloride, N,N-dime...

Embodiment 1

[0038] A kind of phosphorene-graphene composite material, its preparation method comprises the following steps:

[0039]Step a1. Vacuum ball mill 1 g of phosphorene and 9 g of graphite oxide with an oxidation degree of 15%. The time of vacuum ball milling is 0.5 hours, and then add it into a mixed solution of acetone and water for ultrasonic dispersion. The time of ultrasonic dispersion is 60 min. , so as to obtain a mixed suspension of phosphorene and graphite oxide with a concentration of 0.2 g / L.

[0040] Step b1. Soak aluminum foam in the mixed suspension for 20 minutes, and heat and vacuum-dry the mixed suspension at a heating temperature of 45° C. to make all the acetone and water in the mixed suspension Volatilize, then place in a tube furnace with nitrogen and hydrogen mixed gas (hydrogen gas fraction in this mixed gas is 2%), heat to 600 ° C, and keep warm for 3 hours, thus obtain the phosphorene-graphene composite material precursor .

[0041] Step c1, immersing th...

Embodiment 2

[0044] A kind of phosphorene-graphene composite material, its preparation method comprises the following steps:

[0045] Step a2, carry out vacuum ball milling together with 1.5g phosphorene and 7g graphite oxide with 20% oxidation degree, the time of vacuum ball milling is 3 hours, then join in the mixed solution of acetonitrile and water and carry out ultrasonic dispersion, the time of ultrasonic dispersion is 90min, thereby obtaining the mixed suspension of phosphorene and graphite oxide with a concentration of 3g / L.

[0046] Step b2, soak nickel foam in the mixed suspension for 60 minutes, and heat and vacuum-dry the mixed suspension at a heating temperature of 80°C to make all the acetonitrile and water in the mixed suspension Volatilize, then place in a tube furnace with a mixed gas of nitrogen and hydrogen (the hydrogen gas fraction in this mixed gas is 5%), heat to 700 ° C, and keep warm for 5 hours, thereby obtaining the precursor of phosphorene-graphene composite mat...

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Abstract

The invention discloses a phosphorene-graphene composite material and a preparation method thereof. The phosphorene-graphene composite material is a porous foam material formed by compositing of phosphorene and graphene. The preparation method includes: subjecting phosphorene and graphite oxide to vacuum ball milling, and adding into dispersion liquid to disperse to obtain phosphorene and graphite oxide mixed suspension; soaking a porous matrix into the mixed suspension, heating in shielding gas to 500-1100 DEG C, and keeping the temperature for 1-48 hours to obtain a precursor of the phosphorene-graphene composite material; soaking the precursor of the phosphorene-graphene composite material into acid liquid to remove the porous matrix, so that the phosphorene-graphene composite material is obtained. The phosphorene-graphene composite material gives full play to dual advantages of phosphorene and graphene and is great in electricity conductivity, heat conductivity, stability and flexibility, large in specific surface area and excellent in mechanical performance, high yield and high product quality are achieved, and the preparation method is simple, easy in operation and low in equipment requirement.

Description

technical field [0001] The invention relates to the field of phosphorene-graphene nanocomposite materials, in particular to a phosphorene-graphene composite material and a preparation method thereof. Background technique [0002] Phosphorene is a new type of phosphorus nanomaterial, which consists of a single layer of phosphorus atoms tightly packed into a two-dimensional honeycomb structure. Both phosphorene and graphene have excellent optical, thermal, electrical and mechanical properties, and both have high specific surface area and excellent electrochemical properties. Therefore, phosphorene and graphene are widely used in energy storage, adsorption, catalysis, photoelectricity and other fields. have great application potential. Combining the two two-dimensional nanomaterials of phosphorene and graphene will be beneficial to give full play to the excellent properties of both. Most of the existing phosphorene-graphene composites have macrostructures similar to thin film...

Claims

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Application Information

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IPC IPC(8): C01B25/02C01B32/184B82Y30/00B82Y40/00
CPCC01B25/02B82Y30/00B82Y40/00C01P2004/80C01P2006/17
Inventor 祖雷崔秀国连慧琴
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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