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Preparation method of few-layer transition metal disulfide

A transition metal and sulfur compound technology, applied in the direction of metal selenide/telluride, tungsten compound, selenium/tellurium compound, etc., can solve the problems of high boiling point of solvent, expensive solvent, toxicity, etc., and achieve high crystallinity and wide application potential effect

Inactive Publication Date: 2021-10-29
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using some organic solvents, such as N-methylpyrrolidone, N, N-dimethylamide, etc., to exfoliate layered transition metal disulfides by ultrasonic action to form a single-layer or few-layer structure is a major breakthrough, but there are still Some problems: First, although the yield of transition metal disulfide nanosheets produced by ultrasonication is higher than that produced by chemical vapor deposition, it still does not meet the needs of large-scale applications; in addition, the solvents currently used for ultrasonic stripping are expensive and toxic , special care is required during handling, and some solvents have high boiling points and are difficult to remove

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  • Preparation method of few-layer transition metal disulfide
  • Preparation method of few-layer transition metal disulfide

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[0025] Based on mussel inspiration, catechol groups can form effective covalent or non-covalent bonds on the surface of various substrates, based on which small organic molecules containing catechol groups can be used on the surface of transition metal disulfides combined with layers. The invention provides a method for preparing a few-layer transition metal disulfide compound, which specifically comprises the following steps:

[0026] (1) dissolving the weighed small organic molecules containing catechol groups in a liquid solvent to obtain a solution of small organic molecules containing catechol groups with a mass fraction of 0.1-2.0%;

[0027] (2) Add the weighed transition metal disulfide compound to the solution of small organic molecules containing catechol groups obtained in step (1), wherein the transition metal disulfide compound and catechol group The mass ratio of the solution of small organic molecules is 0.5-6:1; then carry out ultrasonic dispersion;

[0028] (...

Embodiment 1

[0040] Prepare a few-layer transition metal disulfide compound, the specific steps are as follows:

[0041] (1) 0.1g of 3,4-dihydroxybenzaldehyde is dissolved in 20mL of ethanol to obtain an ethanol solution containing 3,4-dihydroxybenzaldehyde;

[0042] (2) Add 0.1 g of molybdenum disulfide to the ethanol solution containing 3,4-dihydroxybenzaldehyde obtained above, and ultrasonically disperse at room temperature for 4 h;

[0043] (3) The solution obtained above was centrifuged at a speed of 4000r / min for 40min, and the supernatant was then centrifuged at a speed of 11000r / min for 30min, and the resulting precipitate was redispersed in ethanol and washed 5 times by centrifugation at a speed of 11000r / min. Each washing time is 30min to obtain molybdenum disulfide with few layers.

Embodiment 2

[0045] Prepare a few-layer transition metal disulfide compound, the specific steps are as follows:

[0046] (1) 0.1g of 3,4-dihydroxybenzaldehyde is dissolved in 20mL of ethanol to obtain an ethanol solution of 3,4-dihydroxybenzaldehyde;

[0047](2) Add 0.2 g of molybdenum disulfide to the ethanol solution of 3,4-dihydroxybenzaldehyde obtained above, and ultrasonically disperse at room temperature for 4 h;

[0048] (3) The solution obtained above was centrifuged at a speed of 4000r / min for 40min, and the supernatant was then centrifuged at a speed of 11000r / min for 30min, and the resulting precipitate was redispersed in ethanol and washed 5 times by centrifugation at a speed of 11000r / min. Each washing time is 30min to obtain molybdenum disulfide with few layers.

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Abstract

The invention discloses a preparation method of a few-layer transition metal disulfide compound. According to the preparation method, a small-molecular organic matter containing a catechol group is used as an auxiliary stripping agent, and a blocky transition metal disulfide compound is separated into the few-layer transition metal disulfide compound by utilizing the coordination effect of the catechol group and transition metal through ultrasound waves. The few-layer transition metal disulfide compound prepared by the method has high crystallinity, so the few-layer transition metal disulfide compound has wide application potential in the fields of field effect transistors, photoelectric detectors and the like.

Description

technical field [0001] The invention belongs to the field of inorganic semiconductors, and in particular relates to a preparation method of a few-layer transition metal disulfide compound. Background technique [0002] Transition metal disulfide compounds can be represented by the general formula MX 2 Represents that M is usually an element from the fourth subgroup to the seventh subgroup in the periodic table, and X is the sixth main group element represented by sulfur, including Se and Te, but excluding O, Po, and Lv. A large number of transition metal dichalcogenides have been extensively studied for decades because they can form compounds with different electronic structures. Transition metal dichalcogenides are layered materials in which there are strong intralayer bonds and weak interlayer bonds. Each layer of a transition metal dichalcogenide consists of three atomic layers in which the transition metal is sandwiched by two elements of sulfur. Furthermore, sulfur a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06C01B19/00C01G41/00B82Y30/00B82Y40/00
CPCC01G39/06C01G41/00C01B19/007B82Y30/00B82Y40/00C01P2004/04C01P2002/72C01P2004/20C01P2004/64C01P2004/61
Inventor 袁丛辉唐振斌许一婷戴李宗杨羽歆梁芷暄吴晨至曾碧榕罗伟昂
Owner XIAMEN UNIV
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