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Black phosphorus modified by aromatic compound and preparation method and application thereof

An aromatic compound, black phosphorus technology, applied in the preparation of organic compounds, phosphorus preparation, chemical instruments and methods, etc., can solve problems such as not very ideal, affecting functions, disintegration, etc.

Active Publication Date: 2017-01-11
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Despite its excellent properties, black phosphorus, especially black phosphorene, has a fatal flaw: it is unstable in the air, and is easily oxidized slowly by oxygen when exposed to air, forming phosphorus oxides and phosphoric acid, resulting in a two-dimensional structure of black phosphorus disintegration, and thus affect its function
[0006] The core idea of ​​the existing technical solutions is to cover the surface of black phosphorus with other substances to reduce the contact between black phosphorus and oxygen and water. The effect of solving the oxidation of black phosphorus is not very satisfactory. Therefore, it is necessary to find a new solution to black phosphorus. Phosphorus is oxidized technical solution

Method used

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  • Black phosphorus modified by aromatic compound and preparation method and application thereof
  • Black phosphorus modified by aromatic compound and preparation method and application thereof
  • Black phosphorus modified by aromatic compound and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0072] Dissolve black phosphorus nanosheets in acetonitrile solvent to make the concentration 100 μg / ml, add tetra-tert-butylamine hexafluorophosphate with a concentration of 0.5M in the system and p-methoxybenzene with a concentration of 50mM in the system Diazonium tetrafluoroborate was reacted in the dark at 30°C for 20 hours, and centrifuged at 10,000 rpm for 10 minutes to obtain p-methoxyphenyl-modified black phosphorus.

[0073] The elemental analysis of the obtained product was carried out by X-ray photoelectron spectroscopy (XPS). image 3 As shown), it is found that in the binding energy spectrum of phosphorus, in addition to the characteristic P2p peak of black phosphorus at about 130eV, there is also a characteristic peak of C-P bond near 133eV, while the peak of nitrogen element disappears, indicating that the diazonium salt and black phosphorus are successfully combined. After the reaction, the carbon atom on the benzene ring that was originally connected to the d...

Embodiment 2

[0075] Dissolve black phosphorus nanosheets with a concentration of 20 μg / ml in acetonitrile, drop them on the uncoated silicon wafer substrate, and dry naturally to obtain black phosphorus nanosheets loaded on the uncoated substrate silicon wafer, and then make it in the system Tetra-tert-butylamine hexafluorophosphate with a concentration of 0.1M and p-nitrophenyltetrafluoroborate diazonium salt with a system concentration of 1mM were reacted in the acetonitrile solution at 25°C for 15 hours in the dark to obtain p-nitrophenyl-modified black phosphorus.

Embodiment 3

[0077] Dissolve the black phosphorus nanosheets at a concentration of 500 μg / ml in acetonitrile, drop them on the silicon wafer substrate coated with silicon dioxide and dry naturally to obtain the black phosphorus nanosheets loaded on the silicon wafer substrate coated with silicon dioxide on the surface, and then Make it react in the acetonitrile solution of tetra-tert-butylamine hexafluorophosphate with a system concentration of 2.5M and 2,4-dichlorobenzenetetrafluoroborate diazonium salt with a system concentration of 100mM at 35°C for 24h in the dark to obtain Black phosphorus modified with 2,4-dichlorophenyl.

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Abstract

The invention provides black phosphorus modified by an aromatic compound and a preparation method and application thereof. The black phosphorus modified by the aromatic compound is a product obtained by combining black phosphorus and an aromatic group through a P-C covalent bond. The method comprises the step of performing reaction on diazonium salt of the aromatic compound and a black phosphorus raw material to prepare the black phosphorus modified by the aromatic compound. The application comprises preparation of a thin film transistor material, a cathode material of a battery, a flexible display material, an LED material, a photo-switch material, a biosensor material, a photodynamic therapy reagent and a photo-thermal therapy reagent from the modified black phosphorus. Based on lone pair electrons, the aromatic compound is coupled to the surface of the black phosphorus in a P-C covalent binding way, and the generation of a P-C bond occupies the lone pair electrons of phosphorus atoms, so that the phosphorus atoms lose the capacity of oxidization reaction; and meanwhile, by the existence of an aromatic nucleus, the black phosphorus can be protected, so that the stability of the black phosphorus is kept.

Description

technical field [0001] The invention relates to black phosphorus and its preparation method and application, in particular to a black phosphorus modified by an aromatic compound and its preparation method and application. Background technique [0002] Two-dimensional materials have been a research hotspot in recent years, and typical representatives include graphene and transition metal dichalcogenides with semiconducting properties. Since 2014, a new type of two-dimensional material—Black Phosphorus (BP)—has a variable band gap energy and good carrier mobility. Like graphene, black phosphorus can be exfoliated into single atomic layer sheets, and this single layer of black phosphorus is also called black phosphorene. Black phosphorus has unique properties and excellent performance in mechanical, electronic, optical, thermal, acoustic and other aspects. As a direct band gap semiconductor material, black phosphorus can replace silicon in the semiconductor industry, and can ...

Claims

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Application Information

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IPC IPC(8): C01B25/02C07C201/12C07C205/06C07C17/35C07C25/08A61K41/00A61P35/00
CPCA61K41/0052A61K41/0057C01B25/02C07C17/35C07C201/12C07C205/06C07C25/08
Inventor 喻学锋赵岳涛王怀雨
Owner SHENZHEN INST OF ADVANCED TECH
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