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Black phosphorus nanosheet and preparation method and application thereof

A technology of nanosheets and black phosphorus, which is applied in the preparation of phosphorus, pharmaceutical formulations, medical preparations containing active ingredients, etc., and can solve the problems of restricting the application of black phosphorus nanosheets, difficult removal of organic solvents, and easy residual black phosphorus nanosheets, etc. problem, to achieve good photothermal treatment ability, not easy to repeat, good dispersion effect

Active Publication Date: 2017-01-18
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using this method for large-scale preparation of black phosphorus, on the one hand, it is easy to cause environmental pollution due to the high cost; Applications of black phosphorus nanosheets, especially in the biomedical field

Method used

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  • Black phosphorus nanosheet and preparation method and application thereof
  • Black phosphorus nanosheet and preparation method and application thereof
  • Black phosphorus nanosheet and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This embodiment provides a method for preparing two-dimensional black phosphorus nanosheets in alkaline aqueous solution, which includes the following steps:

[0059] Weigh 25 mg of black phosphorus block in an argon-filled glove box, grind it into powder in a mortar, and place it in pure anaerobic water at a concentration of 1 mg / mL. in N 2 Under the protection of gas, sealed in a 50mL plastic tube in an ice bath temperature-controlled environment, ultrasonically oscillated for 3 hours through a 300W ultrasonic cleaner in a water bath, and then centrifuged at 2000rpm for 20min, the supernatant dispersion was prepared to prepare A black phosphorus nanosheet dispersion was obtained.

[0060] Dilute the obtained black phosphorus nanosheet dispersion 3 times with anaerobic water, move it into a quartz glass dish, place it in a UV–vis–NIR spectrophotometer, detect the absorption curve, and observe the absorption spectrum. The results are as follows: figure 1 As shown, it ...

Embodiment 2

[0062] This embodiment provides a method for preparing two-dimensional black phosphorus nanosheets in alkaline aqueous solution, which includes the following steps:

[0063] Weigh 25 mg of black phosphorus blocks in an argon-filled glove box, grind them into powder in a mortar, and place them in pure anaerobic aqueous solution at a concentration of 1 mg / mL. in N 2 Under the protection of gas, in an ice-bath temperature-controlled environment, seal in a 50mL plastic tube, pass through the probe of the cell disruptor with a power of 1200W and a working interval of 2s and 4s, and strongly oscillate for 3 hours, and then at 2000rpm After centrifuging at a rotational speed for 20 min, the supernatant dispersion was taken to prepare a black phosphorus nanosheet dispersion.

[0064] Dilute the obtained black phosphorus nanosheet dispersion 3 times with anaerobic water, move it into a quartz glass dish, place it in a UV–vis–NIR spectrophotometer, detect the absorption curve, and obse...

Embodiment 3

[0066] This embodiment provides a method for preparing two-dimensional black phosphorus nanosheets in alkaline aqueous solution, which includes the following steps:

[0067] Weigh 25 mg of black phosphorus block in an argon-filled glove box, grind it into powder in a mortar, and place it in NaOH alkaline anaerobic aqueous solution at pH 11 at a concentration of 1 mg / mL. in N 2 Under the protection of gas, in an ice-bath temperature-controlled environment, seal in a 50mL plastic tube, pass through a cell disruptor probe with a power of 1200W and a working interval of 2 seconds and stop for 4 seconds, and strongly oscillate for 3 hours, and then use After centrifuging at 2000 rpm for 20 min, the supernatant dispersion was taken to prepare the black phosphorus nanosheet dispersion.

[0068] Dilute the obtained black phosphorus nanosheet dispersion 3 times with anaerobic water, move it into a quartz glass dish, place it in a UV–vis–NIR spectrophotometer, detect the absorption cur...

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Abstract

The invention provides black phosphorus nanosheet and a preparation method and application thereof. The method comprises the following steps: placing black phosphorus powder into anaerobic water to form a dispersion of black phosphorus powder, and selectively controlling pH of the dispersion to alkaline level; carrying out ultrasonic treatment on the dispersion of black phosphorus powder in an inert environment; and after the ultrasonic treatment, centrifuging and collecting a supernatant so as to obtain the black phosphorus nanosheet. The invention also provides the black phosphorus nanosheet prepared by the method and application of the black phosphorus nanosheet. As no organic solvent is used by the method, the prepared black phosphorus nanosheet has no organic solvent residue, will not pollute the environment and can be applied in the field of biomedicine.

Description

technical field [0001] The invention relates to a black phosphorus nanosheet and its preparation method and application, belonging to the field of novel black phosphorus nanomaterials. Background technique [0002] Two-dimensional layered materials, such as graphene and transition metal dichalcogenides (TMDs), have become a class of nanomaterials with broad prospects in fundamental research and potential applications due to their excellent properties. Black phosphorus is the most stable allotrope of phosphorus. It has a corrugated layered structure similar to but different from the graphene sheet structure. This unique corrugated layered structure endows black phosphorus with many unique physical and chemical properties , such as black phosphorus has a semiconductor direct band gap that graphene does not have, and has an electron mobility that exceeds the transition metal sulfide two-dimensional material ~ 1,000cm 2 V -1 the s -1 , the spectrum includes the entire visible...

Claims

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Application Information

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IPC IPC(8): C01B25/02A61K41/00A61P35/00
CPCA61K41/0052C01B25/02C01P2004/04C01P2004/62
Inventor 喻学锋孙正博王怀雨
Owner SHENZHEN INST OF ADVANCED TECH
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