Preparation method of two-dimensional graphdiyne nanosheet, working electrode, and photoelectric detector

A working electrode and graphdiyne technology, applied in two-dimensional nanomaterials and their application fields, can solve the problems of inability to have high carrier mobility bandgap, flexibility, and difficulty in effectively batch preparation of two-dimensional graphdiyne nanosheets, etc. Achieve excellent photoelectric detection performance, broaden the scope of use, and ensure the effect of work stability

Inactive Publication Date: 2020-10-02
SHENZHEN UNIV
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Problems solved by technology

[0004] In view of this, the present invention provides a method for preparing two-dimensional graphyne nanosheets to solve the problem that the existing preparation methods are difficult to prepare two-dimensional graphyne nanosheets in batches
The present invention also provides a working electrode, a preparation method of the working electrode and a photodetector to solve the problem that existing sensing materials and corresponding photoelectric sensors cannot have high carrier mobility and a suitable bandgap at the same time. , flexibility and other defects

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  • Preparation method of two-dimensional graphdiyne nanosheet, working electrode, and photoelectric detector
  • Preparation method of two-dimensional graphdiyne nanosheet, working electrode, and photoelectric detector
  • Preparation method of two-dimensional graphdiyne nanosheet, working electrode, and photoelectric detector

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[0033] In a first aspect, the invention provides a method for preparing two-dimensional graphyne nanosheets, comprising the following steps:

[0034] Provide an ethanol dispersion of graphyne, transfer the ethanol dispersion of graphyne to 2 to 15°C for ultrasonication for 1 to 7 days, separate the ethanol dispersion of graphyne after ultrasonication by stepwise centrifugation, and collect The graphyne nanosheets obtained at 5,000-8,000 r / min are dried to prepare two-dimensional graphyne nanosheets.

[0035] Preferably, the ethanol dispersion of the graphyne is prepared by the following method: providing the graphyne block powder dispersed in ethanol, the ratio of the mass of the graphyne block powder to the mass of ethanol is 1:16~400, the preparation Obtain the ethanol primary dispersion liquid of graphyne;

[0036] Stir the ethanol primary dispersion of the graphyne for 10-100 min to prepare the ethanol dispersion of the graphyne.

[0037] Optionally, the ratio of the mas...

Embodiment 1

[0052] A kind of preparation method of two-dimensional ultrathin graphyne nanoplate comprises the following steps:

[0053] Step 1: Provide 1 mg of graphyne bulk powder and disperse it in 100 mL of ethanol, mix and stir for 30 minutes, and the stirring speed is 350 rpm to prepare the ethanol dispersion of graphyne

[0054] Step 2: Transfer the ethanol dispersion of graphdiyne to a water bath environment at 8°C, and ultrasonicate the water bath for 4 days.

[0055] Step 3: The ethanol dispersion of the graphyne after ultrasonication in a water bath is separated using a stepwise centrifugation method, the initial centrifugal speed is 3000r / min, centrifuged for 5min, and then the precipitate under the centrifugal condition of 3000r / min is collected; press each time 1000r / min The speed of min gradually increases the rotation speed, and at the same time collects the corresponding precipitate at this rotation speed, thereby obtaining graphdiyne nanosheets with different thicknesses....

Embodiment 2

[0059] A kind of preparation method of two-dimensional ultrathin graphyne nanoplate comprises the following steps:

[0060] Step 1: Provide 1 mg of graphyne bulk powder and disperse it in 500 mL of ethanol, mix and stir for 10 minutes, and the stirring speed is 500 rpm to prepare the ethanol dispersion of graphyne

[0061] Step 2: Transfer the ethanol dispersion of graphdiyne to a water bath environment at 15°C, and ultrasonicate the water bath for 1 day.

[0062] Step 3: The ethanol dispersion of the graphyne after ultrasonication in a water bath is separated using a stepwise centrifugation method, the initial centrifugal speed is 4000r / min, centrifuged for 5min, and then the precipitate under the centrifugal condition of 4000r / min is collected; The speed of min gradually increases the rotation speed, and at the same time collects the corresponding precipitate at this rotation speed, thereby obtaining graphdiyne nanosheets with different thicknesses.

[0063] Step 4: Collect...

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Abstract

The invention provides a preparation method of a two-dimensional graphdiyne nanosheet. The method comprises the following steps: 1, providing an ethanol dispersion of graphdiyne; and transferring theethanol dispersion liquid of graphdiyne to a temperature of 2-15 DEG C, carrying out ultrasonic treatment for 1-7 days, separating the ethanol dispersion liquid of graphdiyne after ultrasonic treatment by using a step-by-step centrifugation method, collecting graphdiyne nanosheets obtained at a speed of 5,000-8,000 r / min, and drying the obtained two-dimensional graphdiyne nanosheets. The two-dimensional graphdiyne nanosheet is an ultrathin graphdiyne nanosheet, of which the thickness can reach 0.46 nm; the preparation process of the ultrathin graphdiyne nanosheet is simple and rapid, the thickness of the graphdiyne nanosheet is controllable, and large-scale preparation of the graphdiyne nanosheet is also easy to realize. The invention also provides a working electrode and a preparation method thereof and further provides a photoelectric detector.

Description

technical field [0001] The present invention relates to two-dimensional nanomaterials and application fields thereof, in particular to a method for preparing two-dimensional graphyne nanosheets, more specifically, to a method for preparing ultrathin graphyne nanosheets; the present invention also relates to a method comprising the above-mentioned A working electrode of an ultrathin graphyne nanosheet and a photodetector comprising the working electrode. Background technique [0002] Two-dimensional (2D) van der Waals materials (vdWMs), such as transition metal dichalcogenides (TMDs), black phosphorus (BP), and graphene, have been extensively explored in the past two decades. 2D vdWMs are rich in anomalous optoelectronic properties and are widely used in sensing, catalysis, energy storage, and photodetection. Among them, graphene is currently the most studied 2D vdWM. Graphene has a very high carrier mobility (~10 5 cm 2 V -1 the s -1 ), however, the lack of a band gap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C08J7/04C08J7/044C08J7/06
CPCC01B2204/22C08J7/042C08J7/06C01B32/184C08J7/044
Inventor 张晗张也
Owner SHENZHEN UNIV
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