Preparation method of black phosphorus alkene-graphene composite material hollow microsphere

A technology of composite materials and hollow microspheres, applied in the preparation of phosphorus, etc., can solve problems such as affecting electrical properties and reducing electron mobility

Active Publication Date: 2015-12-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MoS 2 The presence of structural defects in the medium may lead to a decrease in electron mobility, thereby affecting its electrical properties

Method used

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  • Preparation method of black phosphorus alkene-graphene composite material hollow microsphere
  • Preparation method of black phosphorus alkene-graphene composite material hollow microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) First, add the ethanol dispersion of 0.01mg / mL black phosphorene nanosheets to the ethanol dispersion of 0.5mg / mL graphene oxide nanosheets, and use mechanical stirring to make both black phosphorene and graphene oxide mix. When mixing black phosphorene and graphene, the same solvent should be used, and the volume ratio of the two should be 1:1.

[0017] (2) Spray the mixed dispersion of black phosphorene and graphene oxide into liquid helium through a sprayer with a nozzle diameter of 0.05mm and freeze it into microspheres quickly, and then freeze the obtained black phosphorene and graphene oxide composite material The microspheres were freeze-dried in a freeze dryer for 6 hours to obtain hollow microspheres of black phosphorene and graphene oxide composite material.

[0018] (3) Finally, the graphene oxide was reduced to graphene at 500°C under the condition of nitrogen protection at high temperature, and finally the black phosphorene and graphene composite hollo...

Embodiment 2

[0020] (1) First, add 1 mg / mL dimethyl sulfoxide dispersion of black phosphorene quantum dots to 0.5 mg / mL graphene oxide nanosheet dimethyl sulfoxide dispersion, and use mechanical stirring to make black phosphorus A mixture of both ene and graphene oxide. When mixing black phosphorene and graphene, the same solvent should be used, and the volume ratio of the two should be 1:1.

[0021] (2) Spray the mixed dispersion of black phosphorene and graphene oxide into liquid helium through a sprayer with a nozzle diameter of 0.2mm to rapidly freeze into microspheres, and then freeze the obtained black phosphorene and graphene oxide composite material The microspheres were freeze-dried in a freeze dryer for 24 hours to obtain hollow microspheres of black phosphorene and graphene oxide composite material.

[0022] (3) Finally, the graphene oxide was reduced to graphene at 800°C under the protection of argon gas at high temperature, and the hollow microspheres of black phosphorene and...

Embodiment 3

[0025] (1) First, add the N-methylpyrrolidone dispersion of 2mg / mL black phosphorene quantum dots to the N-methylpyrrolidone dispersion of 1mg / mL graphene oxide nanosheets, and use mechanical stirring to make the black phosphorene mixed with graphene oxide. When mixing black phosphorene and graphene, the same solvent should be used, and the volume ratio of the two should be 1:1.

[0026] (2) Spray the mixed dispersion of black phosphorene and graphene oxide into liquid helium through a sprayer with a nozzle diameter of 0.3mm and freeze it rapidly into microspheres, and then freeze the obtained black phosphorene and graphene oxide composite material The microspheres were freeze-dried in a freeze dryer for 36 hours to obtain black phosphorene and graphene oxide composite hollow microspheres.

[0027] (3) Finally, the graphene oxide was reduced to graphene at 1000°C under the protection of argon at high temperature, and the hollow microspheres of black phosphorene and graphene c...

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Abstract

The invention discloses a preparation method of a black phosphorus alkene-graphene composite material hollow microsphere. The preparation method comprises the steps of adding a black phosphorus alkene nanosheet or black phosphorus alkene quantum dot dispersion liquid into oxidized graphene nanosheet dispersion liquid firstly, and mixing the black phosphorus alkene and the oxidized graphene by adopting a mechanical agitation method; spraying the mixed dispersion liquid of the black phosphorus and the oxidized graphene into liquid helium by a spraying method and rapidly freezing the mixed dispersion liquid into microballoons; then putting the obtained black phosphorus alkene and oxidized graphene composite material microballoons into a freezer dryer for freeze-drying, so as to obtain the black phosphorus alkene and oxidized graphene composite material hollow microballoons; reducing the oxidized graphene into graphene at high temperature under the protection of nitrogen or argon, so as to obtain the balck phosphorus alkene and graphene composite material hollow miroballoons at last. The prepared black phosphorus alkene and graphene composite material hollow miroballoons have a potential application prospect in the fields such as lithium ion batteries, supercapacitors, sensors and filtration purification.

Description

technical field [0001] The invention relates to a method for preparing hollow microspheres of black phosphorene-graphene composite materials. The hollow microspheres are prepared on a large scale by freeze molding and thermal reduction methods, which belongs to the composite material preparation technology. Background technique [0002] Two-dimensional nanomaterials such as graphene and transition metal sulfides have shown extraordinary application potential in many fields such as electronics, sensing and optoelectronic devices due to their excellent physical and structural properties. Among them, graphene has been widely studied as the most representative two-dimensional material. It has ultrahigh carrier mobility, but the lack of a band gap has severely hindered the application of graphene in logic semiconductor devices such as field-effect transistors. As a representative member of the transition metal sulfide semiconductor family, molybdenum disulfide (MoS 2 ) has a si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B25/02
Inventor 徐峰倪亚茹闵辉华朱重阳夏委委李胜利李正锐童日
Owner SOUTHEAST UNIV
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