Preparation method of organic metal framework-coated two-dimensional black phosphorus nanosheets

An organic metal and nanosheet technology, applied in the field of black phosphorus nanosheets, can solve the problems of harsh experimental conditions, destroying the two-dimensional structure of black phosphorus, and complicated methods, and achieve the effect of improving stability.

Active Publication Date: 2019-08-02
SHENZHEN RES INST OF XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the method of chemically modifying titanium ligands or diazobenzene derivatives on black phosphorus is too complicated (Angew.Chem.Int.Ed., 2016, 55, 5003-5007; NatChem.2016, 8, 597-602.), to The

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  • Preparation method of organic metal framework-coated two-dimensional black phosphorus nanosheets
  • Preparation method of organic metal framework-coated two-dimensional black phosphorus nanosheets
  • Preparation method of organic metal framework-coated two-dimensional black phosphorus nanosheets

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Embodiment 1

[0027] This embodiment provides an organometallic framework NH 2 -MIL-53 (Al) the method for coating black phosphorus, comprises the following steps:

[0028] (1) Weigh 60 mg of black phosphorus in anaerobic environment and grind it in 0.1 mg / mL PVP aqueous solution; use a 950W probe to sonicate in a low-temperature water bath for 5 h; take the dispersion and centrifuge at 4000 rpm for 10 min to get the supernatant, the The supernatant was centrifuged at 12000rpm for 6min to collect the precipitate, and then the precipitate was dispersed in absolute ethanol to repeat the centrifugation step, and finally two-dimensional black phosphorus nanosheets (marked as BP) were obtained.

[0029] (2) Take a certain amount of anhydrous aluminum chloride and dissolve it in absolute ethanol, and the concentration is 8mmol / L; the two-dimensional black phosphorus nanosheets in step (1) are redispersed in the ethanol solution of aluminum chloride, Then stir overnight.

[0030] (3) After dryin...

Embodiment 2

[0036] The present embodiment provides a kind of method that organic metal framework MIL-53 (Fe) coats black phosphorus, comprises the following steps:

[0037] (1) Weigh 60 mg of black phosphorus in anaerobic environment and grind it in 0.1 mg / mL PVP aqueous solution; use a 950W probe to sonicate in a low-temperature water bath for 5 h; take the dispersion and centrifuge at 4000 rpm for 10 min to get the supernatant, the The supernatant was centrifuged at 12000rpm for 6min to collect the precipitate, and then the precipitate was dispersed in absolute ethanol to repeat the centrifugation step, and finally two-dimensional black phosphorus nanosheets (marked as BP) were obtained.

[0038](2) take a certain amount of anhydrous zinc chloride and dissolve it in absolute ethanol, and the concentration is 8mmol / L; the two-dimensional black phosphorus nanosheets in step (1) are redispersed in the ethanol solution of zinc chloride, Then stir overnight.

[0039] (3) The dispersion liqu...

Embodiment 3

[0043] This embodiment provides a method for coating black phosphorus with an organic metal framework ZIF-8, comprising the following steps:

[0044] (1) Weigh 60 mg of black phosphorus in anaerobic environment and grind it in 0.1 mg / mL PVP aqueous solution; use a 950W probe to sonicate in a low-temperature water bath for 5 h; take the dispersion and centrifuge at 4000 rpm for 10 min to get the supernatant, the The supernatant was centrifuged at 12000rpm for 6min to collect the precipitate, and then the precipitate was dispersed in absolute ethanol to repeat the centrifugation step, and finally two-dimensional black phosphorus nanosheets (marked as BP) were obtained.

[0045] (2) take a certain amount of anhydrous zinc chloride and dissolve it in absolute ethanol, and the concentration is 8mmol / L; the two-dimensional black phosphorus nanosheets in step (1) are redispersed in the ethanol solution of zinc chloride, Then stir overnight.

[0046] (3) After drying the dispersion i...

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Abstract

The invention discloses a preparation method of organic metal framework-coated two-dimensional black phosphorus nanosheets, and relates to black phosphorus nanosheets. The preparation method comprisesthe following steps: preparing two-dimensional black phosphorus nanosheets; preparing metal ion-modified black phosphorus nanosheets; mixing and dispersing the metal ion-modified black phosphorus nanosheets and an organic ligand in N,N-dimethylformamide DMF, and then transferring a mixed solution to a reaction kettle for constant-temperature crystallization; cooling the reaction kettle to room temperature, centrifuging, and washing to obtain the organic metal framework-coated two-dimensional black phosphorus nanosheets. By a method for forming a metal organic framework on the surface of blackphosphorus, fixation of the metal ions to the surface of the black phosphorus is achieved, the metal ions reduce the electron cloud density on the surface of the black phosphorus, and coating of theMOF (metal organic framework) reduces contact with water and oxygen and improves the stability of the black phosphorus itself. Due to high porosity of the organic metal framework, the prepared organicmetal framework-coated black phosphorus can be applied to gas detection or gas storage.

Description

technical field [0001] The invention relates to black phosphorus nanosheets, in particular to a method for preparing two-dimensional black phosphorus nanosheets coated with an organic metal framework. Background technique [0002] Black phosphorus is one of the allotropes of phosphorus, which was prepared by American scientists as early as 1914, and its synthesis conditions are extremely harsh. Compared with common black phosphorus and white phosphorus, the thermodynamic stability of bulk black phosphorus is relatively better. It is reported in the literature that black phosphorus nanosheets can be obtained by mechanical exfoliation. The remarkable feature of black phosphorus nanosheets is that its bandgap can be adjusted by its number of layers, and the range of variation is 0.3-2.0eV, which just makes up for the graphene. Insufficient bandgap. Another feature of black phosphorus nanosheets is its biocompatibility. Phosphorus is an essential element for life movement, and...

Claims

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Application Information

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IPC IPC(8): C01B25/02
CPCC01B25/02
Inventor 徐俊翁建韩斌许清池
Owner SHENZHEN RES INST OF XIAMEN UNIV
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