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Preparation method of antioxidant black phosphorus nanosheet

A nanosheet, anti-oxidation technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of insufficient stability, high cost, complicated operation process, etc., and achieve low cost, oxidation prevention, and simple operation. Effect

Inactive Publication Date: 2020-08-04
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is still limited by insufficient stability, complicated operation process and high cost.

Method used

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  • Preparation method of antioxidant black phosphorus nanosheet
  • Preparation method of antioxidant black phosphorus nanosheet
  • Preparation method of antioxidant black phosphorus nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Preparation of black phosphorus nanosheets with a diameter of 1-100nm: take the BP bulk material and disperse it in anhydrous nitrogen-nitrogen dimethylformamide / ethanol solution with a mass concentration of 0.5mg mL -1 , deoxygenated by argon for 0.5h, and ultrasonicated for 30h in an ice bath (KD250, 250W). Let stand overnight to remove the unstripped BP precipitate, centrifuge the supernatant suspension at 12000rpm for 20min to remove nitrogen nitrogen dimethylformamide solvent molecules, wash the precipitate with ethanol, and dry it in vacuum. At the same time, 7.59 g of triethylamine (TEA) was dissolved in 50 mL of CH 2 Cl 2 Prepare a solution of the alkanylamine in .

[0035] Step 2: Take 50 mg of black phosphorus nanosheets and disperse them in 50 mL of anhydrous DMF solution, add the above-mentioned alkane amine solution, and mix evenly by stirring for 1 h.

[0036] Step 3: After sealing the above mixed solution, heat it to 100° C. under the protectio...

Embodiment 2

[0039] Step 1: Preparation of black phosphorus nanosheets with a diameter of 1-100nm: take the BP body material and disperse it in anhydrous formamide / ethanol solution with a mass concentration of 0.5mg mL -1 , deoxygenated by argon for 0.5h, and ultrasonicated for 30h in an ice bath (KD250, 250W). Let stand overnight to remove the unstripped BP precipitate, centrifuge the supernatant suspension at 12000rpm for 20min to remove nitrogen nitrogen dimethylformamide solvent molecules, wash the precipitate with ethanol, and dry it in vacuum. At the same time, 9.59 g of diethylmethylamine (DEMA) was dissolved in 50 mL of CH 2 ClCH 2 Prepare a solution of the alkylamine in Cl.

[0040] Step 2: Take 50 mg of black phosphorus nanosheets and disperse them in 50 mL of anhydrous benzyl alcohol solution, add the above-mentioned solution for preparing alkane amine, and mix evenly by ultrasonication for 1 h.

[0041] Step 3: Heat the above mixture to 140° C. under nitrogen protection, and...

Embodiment 3

[0045] Step 1: Preparation of black phosphorus nanosheets with a diameter of 1-100nm: take the BP body material and disperse it in anhydrous nitrogen methyl pyrrolidone solution with a mass concentration of 0.5mg mL -1 , deoxygenated by argon for 0.5h, and ultrasonicated for 30h in an ice bath (KD250, 250W). Stand overnight to remove the unstripped BP precipitate, centrifuge the upper layer suspension at 12000rpm for 20min to remove NMP solvent molecules, wash the precipitate with ethanol, and dry it in vacuum. Meanwhile, 7.59 g of triethylamine (TEA) was dissolved in 50 mL of CH 2 Cl 2 Prepare a solution of the alkanylamine in .

[0046] Step 2: Take 50 mg of black phosphorus nanosheets and disperse them in 50 mL of anhydrous DMF solution, add the above-mentioned solution for preparing alkane amine, and mix evenly by ultrasonication for 1 h.

[0047] Step 3: Heat the above mixture to 90° C. under nitrogen protection, and reflux for 12 h.

[0048] Step 4: Allow the reactio...

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Abstract

The invention discloses a preparation method of an antioxidant black phosphorus nanosheet, and belongs to the field of two-dimensional layered materials. The preparation method comprises the followingsteps: adding black phosphorus nanosheets into an organic solvent to prepare an organic solvent dispersion liquid of the black phosphorus nanosheets, and meanwhile, and preparing a halogenated alkanemodification solution of alkylamine as a surface modifier; mixing the organic solvent dispersion liquid of the black phosphorus nanosheets with the surface modifier to obtain a mixture; placing the mixture in a sealed system heated in an inert atmosphere for reflux reaction; and cooling the mixed solution, carrying out liquid-solid separation, washing, and drying to obtain the antioxidant black phosphorus nanosheet. Dialkyl methylamine is grafted to the surface of the black phosphorus nanosheets through P-C-N bonds, P is directly connected with methylene, dialkylamine is exposed to the outerside, alkylamine oxidation kinetics is slow, and oxidation of the black phosphorus nanosheets can be effectively prevented. Meanwhile, compared with the existing aromatic azide chemical, the dialkyl methylamine is low in price and environment-friendly. The method is suitable for fields such as field-effect transistors and photoelectric detectors.

Description

technical field [0001] The invention belongs to the field of two-dimensional layered materials, and relates to black phosphorus materials, in particular to a preparation method of oxidation-resistant black phosphorus nanosheets. Background technique [0002] In recent years, two-dimensional BP, as a semiconductor with a layered structure, has aroused extensive research interests of researchers. Unlike graphene, black phosphorus is a thickness-dependent semiconductor with direct energy bands ranging from 0.3 eV for bulk materials to 1.5 eV for monolayer black phosphorene. Compared with molybdenum disulfide, black phosphorus has higher carrier mobility (~200-1000cm2 V-1s-1), larger switching ratio (>10 5 ) and anisotropic properties. These excellent properties make black phosphorus not only have broad application prospects in the field of nano-optoelectronic devices, but also have good application prospects in the fields of catalysis, sensing, and smart devices, especiall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/00B82Y30/00
CPCB82Y30/00C01B25/006
Inventor 翁建陈园园彭健
Owner XIAMEN UNIV
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