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Preparation method and applications for hydroxyl modified black phosphorus material

A technology of black phosphorus and hydroxyl group, applied in the field of preparation of black phosphorus materials, can solve the problems of high price of black phosphorus, harsh preparation conditions and high process cost, and achieve the effects of simple process, low cost and improved stability

Inactive Publication Date: 2019-08-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 products is generally around 0.1.
[0003] At present, the price of black phosphorus is still very expensive, the main reason is that the preparation conditions are harsh and the process cost is high

Method used

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  • Preparation method and applications for hydroxyl modified black phosphorus material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare the black phosphorus material of hydroxyl modification according to the following steps:

[0033] (1) 2 grams of red phosphorus powder (price about 1.8 yuan / gram) with a purity of 99% and an average particle size of 7 μm are put into a high-energy ball mill jar for ball milling. The mass ratio of steel balls and red phosphorus, that is, the ball-to-material ratio, is 30: 1. After feeding nitrogen into the ball mill tank, seal it, 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 24h, and ultrafine black phosphorus powder is obtained after ball milling.

[0034] (2) Open the ball mill tank in step (1) in the glove box with nitrogen, add 2gNaOH powder in the ultrafine black phosphorus powder, seal after passing into nitrogen in the ball mill tank, put into the ball mill then, start the second Stage ball milling, the ball milling speed is 600rpm, and the ball milling time...

Embodiment 2

[0039] Prepare the black phosphorus material of hydroxyl modification 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, then start ball milling, the ball milling speed is 800rpm, the ball mill pauses for 20min every 1h of ball milling, the ball milling time is 30h, and ultrafine black phosphorus powder is obtained after ball milling.

[0041] (2) in the glove box with nitrogen, open the ball mill tank in step (1), add 10g ethylene glycol organic matter in the ultrafine black phosphorus powder, seal after passing into nitrogen in the ball mill tank, then put into ball mill, Start the second stage of ball milling, the ball milling speed is 800rpm, and the ball milling time is 6h.

[0042] ...

Embodiment 3

[0045] Using commercially available black phosphorus blocks or black phosphorus crystal powders as raw materials, the method of the present invention can also be used to prepare hydroxylated black phosphorus materials, specifically according to the following steps:

[0046] (1) Weigh 1g of commercially available black phosphorus powder and put it into a high-energy ball mill jar for ball milling. After nitrogen gas is introduced into the ball mill jar, it is sealed, and then ball milling is started. The ball milling speed is 200rpm, and ultrafine black phosphorus powder is obtained after ball milling for 2 hours.

[0047](2) Open the ball mill tank in step (1) in a glove box with nitrogen, add 3gNaOH powder in the ultrafine black phosphorus powder, seal after passing into nitrogen in the ball mill tank, put into the ball mill then, start the second Stage ball milling, the ball milling speed is 600rpm, and the ball milling time is 6h.

[0048] (3) After the second stage of ball...

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Abstract

The invention discloses a preparation method and applications for a hydroxyl modified black phosphorus material belonging to the technical field of two-dimensional materials. The preparation method specifically includes the following steps: adding a hydrogen-rich and oxygen-rich inorganic matter and / or a hydroxyl-rich alcohol organic matter into black phosphorus powder; and preparing a hydroxyl modified black phosphorus material through ball milling, washing, centrifugation and drying. Black phosphorus takes red phosphorus as a raw material, and the ultrafine black phosphorus powder is obtained through high-speed ball milling; and the ball milling can be performed under an inert atmosphere. The preparation method is simple in process, low in cost and easy in popularization; and the prepared black phosphorus material has strong stability in air and water and strong dispersion uniformity in the water, and a water-based solution configured by the prepared hydroxyl modified black phosphorus material can have extremely low friction coefficients.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional materials, in particular to a preparation method and application of a hydroxyl-modified black phosphorus material. Background technique [0002] Black phosphorus is the most stable form among the three common allotropes of phosphorus (red phosphorus, white phosphorus and black phosphorus). 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 lubrication products is generally aro...

Claims

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Application Information

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IPC IPC(8): C01B25/02C01B25/00C10M125/00C10N30/06
CPCC01B25/006C01B25/02C10M125/00C10N2030/06
Inventor 王伟任小勇解国新雒建斌
Owner TSINGHUA UNIV
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