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Hydroxylation black phosphorus quantum dot water-based solution preparation method and application

A technology for hydroxylation of black phosphorus and quantum dots, which is used in the preparation of phosphorus, medical preparations containing active ingredients, phosphorus, etc., can solve the problem that the stability of black phosphorus quantum dots needs to be improved, restrict the development and application of black phosphorus quantum dots, Phosphorus quantum dots are prone to degradation and other problems, achieving the effect of easy promotion, low friction coefficient, and easy promotion and application

Active Publication Date: 2019-07-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, black phosphorus quantum dots are mainly prepared by ultrasonic stripping method or solvothermal method. These methods are characterized by time and energy consumption, cumbersome operation, and the yield of black phosphorus quantum dots is very low. It is easy to degrade, which limits the further development and application of black phosphorus quantum dots
[0005] In summary, the main problems at present are: 1) It is necessary to develop a lubricating fluid with a low friction coefficient, and black phosphorus has great application potential; 2) The preparation cost of black phosphorus is high, and it is urgent to develop a low-cost preparation process; 3) There is still a lack of low-cost lubricants. Low-cost, high-yield method for preparing black phosphorus quantum dots; 4) the stability of black phosphorus quantum dots needs to be improved

Method used

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  • Hydroxylation black phosphorus quantum dot water-based solution preparation method and application
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  • Hydroxylation black phosphorus quantum dot water-based solution preparation method and application

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Effect test

Embodiment 1

[0039] Prepare the hydroxylated black phosphorus quantum dot water-based solution according to the following steps:

[0040] (1) Weigh 2 grams of red phosphorus powder with a purity of 99% and an average particle size of 7 μm (the price is about 1.8 yuan / g) and put it into a high-energy ball mill tank for ball milling. The ball-to-material ratio is 30:1, and nitrogen is introduced into the ball mill tank Finally, seal it, and then start ball milling, the ball milling speed is 800rpm, the ball mill pauses for 20 minutes every 1 hour of ball milling, and the ball milling time is 24 hours; superfine black phosphorus powder is obtained.

[0041] (2) After the ball mill finishes, open the ball mill tank in a glove box with nitrogen, add 30g of absolute ethanol, seal it after feeding nitrogen in the ball mill tank, then put it into the ball mill, start the second stage ball mill, the ball mill speed is 600rpm, ball milling time is 6h; in the process of high-speed ball milling, ethan...

Embodiment 2

[0050] Prepare the hydroxylated black phosphorus quantum dot water-based solution according to the following steps:

[0051] (1) Weigh 2 grams of red phosphorus powder with a purity of 99% and an average particle size of 7 μm (the price is about 1.8 yuan / g) and put it into a high-energy ball mill tank for ball milling. The ball-to-material ratio is 30:1, and nitrogen is introduced into the ball mill tank Then seal it, and then start ball milling, the ball milling speed is 800rpm, the ball mill pauses for 20min every 1h of ball milling, and the ball milling time is 30h; superfine black phosphorus powder is obtained.

[0052] (2) After the ball mill is finished, open the ball mill tank in a glove box with nitrogen gas, add 30g of ethylene glycol and ethanol with a mass ratio of 1:1 mixed solution, pass nitrogen into the ball mill tank and seal it, then put it into the ball mill , start the second stage of ball milling, the ball milling speed is 800rpm, and the ball milling time ...

Embodiment 3

[0058] Hydroxylated black phosphorus quantum dots can also be prepared by using commercially available black phosphorus blocks and black phosphorus crystal powders. Specifically, the aqueous solution of hydroxylated black phosphorus quantum dots can be prepared according to the following steps:

[0059] (1) Take 1g of commercially available black phosphorus crystal powder, put it into a high-energy ball mill jar for ball milling, and then seal it after feeding nitrogen into the ball mill jar, then start ball milling, the ball milling speed is 200rpm, and ball mill for 2h to obtain ultrafine black phosphorus powder .

[0060] (2) After the first stage of ball milling, open the ball milling jar in a glove box with nitrogen, add 30g of absolute ethanol, seal it after feeding nitrogen into the ball milling jar, then put it into the ball mill, and start the second stage of ball milling, The ball milling speed is 600rpm, and the ball milling time is 6h; during the high-speed ball mi...

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Abstract

The invention discloses a hydroxylation black phosphorus quantum dot water-based solution preparation method and application. The preparation method specifically comprises the following steps: (1) adding an alcohol organic solvent into black phosphorus and ball milling and centrifugally separating to take liquid supernatant; (2) centrifugally separating or rotary evaporating the liquid supernatantin the step (1) and adding water or an alcohol-water mixture into obtained precipitate to obtain a hydroxylation black phosphorus quantum dot water-based solution. The prepared hydroxylation black phosphorus quantum dot water-based solution disclosed by the invention has the advantages of ultralow friction coefficient, high wear resistance and application to preparing thin film transistor materials, negative electrode materials of batteries, flexible display materials, LED materials, optical switch materials, biosensor material, photodymanic therapy reagents or photo-thermal therapy reagentsand water-based lubricants.

Description

technical field [0001] The invention belongs to the technical field of new nanometer materials, and in particular relates to a preparation method and application of a hydroxylated black phosphorus quantum dot water-based solution. Background technique [0002] Phosphorus has three common allotropes: red phosphorus, white phosphorus and black phosphorus, and black phosphorus is the most stable form. Black phosphorus has a natural sheet structure similar to graphite, and the layer is composed of sp 3 The hybrid phosphorus atoms are connected in the form of honeycomb folds, and the layers are connected by weak van der Waals force. The unique structure of black phosphorus makes it have good photoelectric conversion efficiency, high electron mobility and excellent biocompatibility. It has a good application prospect. However, there are relatively few researches on the application of black phosphorus in the field of lubrication; the friction coefficient of existing lubricating p...

Claims

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Application Information

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IPC IPC(8): C01B25/02B82Y30/00A61K41/00C10M173/02C10N30/06
CPCA61K41/0052B82Y30/00C01B25/003C01B25/02C10M173/02C10M2201/04C10N2030/06
Inventor 任小勇解国新王伟雒建斌
Owner TSINGHUA UNIV
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