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High-stability two-dimensional black phosphorene as well as preparation method and application thereof

A high-stability, black phosphorene technology, applied in the preparation of phosphorus, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as increasing stability and catalytic activity, and achieve improved stability, environmental friendliness, and treatment. mild conditions

Pending Publication Date: 2019-12-31
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, organic solvents are used to introduce organic functional groups to modify the surface of ultra-thin black phosphorus, and the bulk black phosphorus can be exfoliated to no more than 2nm, and the stability and catalytic activity can be increased. There is no related article report

Method used

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  • High-stability two-dimensional black phosphorene as well as preparation method and application thereof
  • High-stability two-dimensional black phosphorene as well as preparation method and application thereof
  • High-stability two-dimensional black phosphorene as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Weigh 50 mg of bulk black phosphorus into a centrifuge tube, add 30 mL of liquid nitrogen, keep it for 30 minutes, disperse it in a mixed solution of 30 mL of IPA and 15 mL of water, and treat it with ultrasonic waves of 200 W for 3 hours at a water bath temperature of 5 °C. The above solution was centrifuged at 5000 rpm for 5 minutes, and the supernatant obtained by separation was a two-dimensional ultra-thin black phosphorus dispersion. Freeze-dry at minus 80°C to obtain two-dimensional ultra-thin black phosphorus powder.

Embodiment 2

[0030] Example 2: Weigh 100 mg of bulk black phosphorus into a centrifuge tube, add 40 mL of liquid nitrogen, keep it for 40 minutes, disperse it in a mixed solution of 40 mL of IPA and 30 mL of water, and treat it with 150 W ultrasonic wave for 4 hours, and the temperature of the water bath is 7 °C. The above solution was centrifuged at 5000 rpm for 5 minutes, and the supernatant obtained by separation was a two-dimensional ultra-thin black phosphorus dispersion. Freeze-dry at minus 70°C to obtain two-dimensional ultra-thin black phosphorus powder.

Embodiment 3

[0031] Example 3: Weigh 150 mg of bulk black phosphorus into a centrifuge tube, add 50 mL of liquid nitrogen, keep it for 60 minutes, disperse it in a mixed solution of 50 mL of IPA and 50 mL of water, and ultrasonically treat it for 5 hours at a water bath temperature of 0°C. The above solution was centrifuged at 5000 rpm for 5 minutes, and the supernatant obtained by separation was a two-dimensional ultra-thin black phosphorus dispersion. Freeze-dry at minus 70°C to obtain two-dimensional ultra-thin black phosphorus powder.

[0032] The structural test of the prepared sample was carried out on a German Bruker D8 type ray diffractometer (XRD) (Cu-Kα ray, The range is 10°-80°), and the scan rate is 7°min-1. like figure 1 As shown, all peaks of bulk black phosphorus and two-dimensional ultrathin black phosphorus obtained by ultrasonic liquid phase exfoliation can correspond to the standard XRD card of black phosphorus (JCPDS: 74-1872).

[0033] The two-dimensional ultrathin...

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Abstract

The invention discloses high-stability two-dimensional black phosphorene as well as a preparation method and an application thereof, relates to the preparation method of the two-dimensional ultrathinblack phosphorus by taking an organic solvent rich in hydroxyl functional groups as a source and introducing hydroxyl through ultrasonic liquid-phase stripping, and belongs to the technical field of preparation methods of two-dimensional materials. The material is modified, and the hydroxyl functional groups are introduced to the surface of black phosphorus by using the organic solvent, so that black phosphorus can also stably exist in air. At present, the organic functional group is introduced by the organic solvent to modify the surface of ultrathin black phosphorus, blocky black phosphorusis stripped to be not more than 2 nm, and the stability and catalytic activity can be improved.

Description

technical field [0001] The invention relates to an ultrasonic liquid phase exfoliation, which uses an organic solvent rich in hydroxyl functional groups as a source and introduces a hydroxyl group into a two-dimensional ultra-thin black phosphorus preparation method, belonging to the technical field of two-dimensional material preparation methods. Background technique [0002] In recent years, two-dimensional ultrathin nanomaterials have been used in photocatalytic CO 2 The applied research on reduction is gradually increasing. Due to their ultrathin thickness and large specific surface area, two-dimensional ultrathin materials can provide a large number of surface coordination unsaturated atoms as catalytic active sites to improve catalytic activity. Compared with bulk materials, the special two-dimensional structure endows ultra-thin materials with good grain boundary connectivity, making the contact between ultra-thin materials and reactants closer, thereby promoting the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/00C01B25/02B82Y40/00B01J27/14B01J37/34
CPCC01B25/003C01B25/02B82Y40/00B01J27/14B01J37/343B01J35/39
Inventor 许晖周望李启笛杨金曼周固礼李华明
Owner JIANGSU UNIV
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