Black phosphorus quantum dot and preparation method thereof

A technology of quantum dots and black phosphorus, applied in the field of black phosphorus quantum dots and its preparation, can solve the problems of low yield of flake black phosphorus, less amount of black phosphorus flakes, large material size, etc. Good dispersion, small size effect

Inactive Publication Date: 2016-12-07
SHENZHEN INST OF ADVANCED TECH
View PDF3 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield of flaky black phosphorus prepared by mechanical exfoliation is low, which is not suitable for the production of commercially applicable materials, and the operation is cumbersome, time-consuming, a...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Black phosphorus quantum dot and preparation method thereof
  • Black phosphorus quantum dot and preparation method thereof
  • Black phosphorus quantum dot and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of black phosphorus quantum dots, comprising the steps of:

[0054] (1) Weigh 10 mg of bulk black phosphorus in a nitrogen-filled glove box, grind it and disperse it in 10 mL of N-methylpyrrolidone, seal it, and obtain the first dispersion of 1 mg / mL;

[0055] (2) Take 2 mL of the above-mentioned first dispersion, add 18 mL of N-methylpyrrolidone to dilute, then add 200 mg of sodium hydroxide, and stir evenly to obtain the second dispersion;

[0056] (3) Add the above-mentioned second dispersion liquid into a polytetrafluoroethylene high-pressure reactor, heat and react at a temperature of 140°C for 18 hours, and after the resulting reaction liquid is cooled to room temperature, centrifuge at a speed of 7000 rpm for 20 minutes , collecting the supernatant to obtain black phosphorus quantum dots dispersed in N-methylpyrrolidone.

[0057] The black phosphorus quantum dots obtained in Example 1 are relatively stable and can be stored at room temperatu...

Embodiment 2

[0060] A preparation method of black phosphorus quantum dots, comprising the steps of:

[0061] Weigh 30 mg of bulk black phosphorus in a nitrogen-filled glove box, grind it and disperse it in 25 mL of N-methylpyrrolidone, seal it, and obtain the first dispersion of 1.2 mg / mL;

[0062] Take 4mL of the first dispersion above, add 36mL of N-methylpyrrolidone, and add 400mg of sodium hydroxide, stir evenly to obtain the second dispersion;

[0063] Add the above-mentioned second dispersion liquid into the autoclave, and heat the reaction at 120°C for 14 hours. After the heating is completed and the system is cooled to room temperature, centrifuge the obtained reaction liquid at a speed of 9000 rpm for 10 minutes, collect supernatant; then the collected supernatant was subjected to high-speed centrifugation for 20min at a speed of 12000rpm to collect the solid product or disperse the solid product in absolute ethanol to obtain black phosphorus dispersed in absolute ethanol with a s...

Embodiment 3

[0065] A preparation method of black phosphorus quantum dots, comprising the steps of:

[0066] Weigh 12 mg of bulk black phosphorus in a nitrogen-filled glove box, grind it and disperse it into 20 mL of N-methylpyrrolidone, seal it, and obtain the first dispersion of 0.6 mg / mL;

[0067] Take 3mL of the above-mentioned first dispersion, add 27mL of dimethylformamide, and add 300mg of sodium hydroxide, stir evenly to obtain the second dispersion;

[0068] Add the above-mentioned second dispersion liquid into a high-pressure reaction kettle, heat the reaction at 130°C for 10 hours, after the heating is completed, and the system is cooled to room temperature, centrifuge the obtained reaction liquid at a speed of 6000 rpm for 30 minutes, collect supernatant to obtain black phosphorus quantum dots dispersed in N-methylpyrrolidone.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Absorption peakaaaaaaaaaa
Sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a preparation method of a black phosphorus quantum dot. The method comprises the following steps: 1, dispersing black phosphorus with the particle size of 5-50 [mu]m in a first organic solvent to obtain a first dispersion with the black phosphorus concentration of 0.6-1.2 mg/mL; 2, diluting the first dispersion 5-10 times with the first organic solvent, and adding sodium hydroxide to obtain a second dispersion, wherein a mass ratio of the black phosphorus to sodium hydroxide is 0.006-0.012:1; and 3, placing the second dispersion in a closed container, heating and reacting the second dispersion at 120-160 DEG C for 6-18h, cooling the above obtained reaction solution to room temperature, centrifuging the cooled solution, and collecting obtained supernatant to obtain the black phosphorus quantum dot. The method has the advantages of simple process, easiness in operation, high yield, good reappearance, and overcoming of the defects of large dimensions of obtained blck phosphorus sheet materials and low yield in the prior art. The invention also provides the black phosphorus quantum dot.

Description

technical field [0001] The invention relates to the field of novel nanometer materials, in particular to a black phosphorus quantum dot and a preparation method thereof. Background technique [0002] As an allotrope of phosphorus, a new two-dimensional layered material, black phosphorus, has a natural wrinkled structure similar to but different from the graphene sheet structure. This unique wrinkled structure leads to black phosphorus having many unique physical properties. Properties, such as black phosphorus has a semiconductor gap that graphene does not have and is a direct band gap, that is, the bottom of the electronic conductive energy band (conduction band) and the top of the non-conductive energy band (valence band) are at the same position, realizing conduction from non-conductive to conductive, The electronic value requires absorptive capacity, which means that black phosphorus can be used as a tunable semiconductor, which can be directly coupled with light, and th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K11/70B82Y20/00B82Y40/00
CPCC09K11/70B82Y20/00B82Y40/00
Inventor 喻学锋谢寒寒黄浩
Owner SHENZHEN INST OF ADVANCED TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap