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Controllable synthetic method of two-dimensional wurtzite-form cadmium selenide nanomaterials

A wurtzite-type, nano-material technology, applied in the directions of binary selenium/tellurium compounds, metal selenide/tellurium compounds, etc., can solve the problems of complicated operation and physical technology, and achieve the effect of high-efficiency luminescence performance

Inactive Publication Date: 2016-07-27
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0004] At present, there are various methods for the synthesis and preparation of ultra-thin semiconductor two-dimensional nanomaterials, such as molecular beam epitaxy (MBE), metal organic chemical vacuum deposition (MOCVD), atomic layer deposition (ALD), solution thermal injection, etc. , but these methods operate cumbersome physical techniques, applications are limited by templates, or require precise control

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  • Controllable synthetic method of two-dimensional wurtzite-form cadmium selenide nanomaterials
  • Controllable synthetic method of two-dimensional wurtzite-form cadmium selenide nanomaterials
  • Controllable synthetic method of two-dimensional wurtzite-form cadmium selenide nanomaterials

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Embodiment 1

[0016] Ⅰ. Synthesis: 1.5mmol cadmium hydroxide (Cd(OH) 2 ), 2mmol selenium powder (Se) are dispersed in the mixed solution of 10ml octylamine and 10ml octadecylamine, the mixed solution is sealed in the stainless steel autoclave of 25ml polytetrafluoroethylene liner, heat 16h in oven 100 ℃ Afterwards, it was naturally cooled to room temperature in a fume hood;

[0017] Ⅱ. Transfer the product to a 40ml centrifuge tube, centrifuge at 8000r / min for 3min, remove the supernatant, and wash with absolute ethanol, hexane, absolute ethanol, and hexane successively. After centrifugation, the small discs at the bottom of the centrifuge tube were vacuum-dried at 30°C for 2 hours, ground and transferred to obtain two-dimensional wurtzite-type cadmium selenide nanomaterials with a fluorescence emission peak of 452 nm, which were denoted as W-CdSeNPLs .

[0018] The above-mentioned two-dimensional wurtzite-type cadmium selenide nanomaterial with a fluorescence emission peak of 452nm was c...

Embodiment 2

[0020] Ⅰ. Synthesis: 1.5mmol cadmium hydroxide (Cd(OH) 2 ), 2mmol selenium powder (Se) are dispersed in the mixed solution of 10ml octylamine and 10ml octadecylamine, the mixed solution is sealed in the stainless steel autoclave of 25mL polytetrafluoroethylene liner, heat 24h in oven 120 ℃ Afterwards, it was naturally cooled to room temperature in a fume hood;

[0021] Ⅱ. Transfer the product to a 40ml centrifuge tube, centrifuge at 8000r / min for 3min, remove the supernatant, and wash with absolute ethanol, hexane, absolute ethanol, and hexane successively. After centrifugation, the small disc at the bottom of the centrifuge tube was vacuum-dried for 2 hours at a temperature range of 30°C, and then transferred after grinding to obtain a two-dimensional wurtzite-type cadmium selenide nanomaterial with a fluorescence emission peak of about 575 nm, which is denoted as W-CdSeNPLs .

[0022] The above-mentioned two-dimensional wurtzite-type cadmium selenide nanomaterials with a f...

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Abstract

The invention discloses a controllable synthetic method of two-dimensional wurtzite-form cadmium selenide nanomaterials, belonging to the technical field of synthesis of two-dimensional semiconductor light emitting materials. According to the method, cadmium hydroxide and selenium powder are selected, and octylame and octadecylamine are used as solvents for carrying out hydrothermal solvothermal reaction so as to controllably synthesize two-dimensional wurtzite-form cadmium selenide nanosheets with fluorescence-emission peaks at 450nm-460mm and 569nm-580nm. By regulating the reaction time and temperature, two two-dimensional wurtzite-form cadmium selenide nanomaterials with different thicknesses and fluorescence-emission wavelengths can be obtained. According to the method, the theoretical research basis and the practical experience summary are provided for the controllable synthesis of the two-dimensional wurtzite-form cadmium selenide nanosheets, and the nanomaterials can be used for preparing photoelectric devices.

Description

technical field [0001] The invention belongs to the technical field of synthesis of two-dimensional semiconductor luminescent materials, in particular to a controllable synthesis method of two-dimensional wurtzite-type cadmium selenide nanomaterials (molecular formula: CdSe) with different fluorescence emission wavelengths. Background technique [0002] Graphene is a hexagonal honeycomb lattice composed of carbon atoms with sp2 hybrid orbitals, which is a two-dimensional material with a single atomic layer thickness. Since the successful preparation of graphene in 2004, compared with zero-dimensional and one-dimensional carbon nanomaterials, two-dimensional carbon nanomaterials have shown exceptionally good and unique properties, such as high thermal conductivity, super mechanical strength, large Surface area, etc., and these properties can be applied to semiconductors, catalysis, biotechnology, etc. The special structure and properties of graphene have triggered a global w...

Claims

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Application Information

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IPC IPC(8): C01B19/04
CPCC01B19/007C01P2002/72C01P2004/03
Inventor 魏朔王晋慧李静郝秀芳
Owner BEIJING NORMAL UNIVERSITY
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