Molybdenum disulfide quantum dot preparation method

A technology of molybdenum disulfide and quantum dots, applied in the direction of molybdenum sulfide, etc., can solve the problems of large-scale and high-efficiency preparation of quantum dots, long time-consuming, low yield, etc., to achieve weakening of the van der Waals force between layers, short time-consuming, The effect of high yield

Pending Publication Date: 2017-09-29
深圳理大科技产业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for preparing molybdenum disulfide quantum dots, which solves the problems of low yield, long time consumption, and inability to prepare quantum dots on a large scale and with high efficiency in the existing method for preparing molybdenum disulfide quantum dots

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  • Molybdenum disulfide quantum dot preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A preparation method of molybdenum disulfide quantum dots, comprising the steps of:

[0039] (1) Put 250 mg of molybdenum disulfide powder with a particle size of less than 2 μm in an agate mortar, add 1 g of 1-butyl-3-methylimidazolium hexafluorophosphate and grind it in an agate mortar for 1 hour to obtain the first dispersion liquid;

[0040] (2) Dilute the first dispersion with 10 mL of N-methylpyrrolidone, transfer it to a closed glass container, and place the glass container in an ultrasonic wave with a power of 120 W for 2 hours. After cooling to room temperature, centrifuge at 12,000 rpm for 10 Minutes to collect the precipitate;

[0041] (3) Redissolve the precipitate in 50mL N-methylpyrrolidone and transfer it to an airtight glass container, place it in a constant temperature oven at 100°C for 4 hours, cool the resulting reaction solution to room temperature, and collect 90% of the upper layer with a pipette clear liquid to obtain the second dispersion liqui...

Embodiment 2

[0046] A preparation method of molybdenum disulfide quantum dots, comprising the steps of:

[0047] (1) 300 mg of molybdenum disulfide powder with a particle size of 2-4 μm is placed in an agate mortar, 1.2 g of 1-butyl-3-methylimidazolium hexafluorophosphate is added and ground for 1 hour in an agate mortar to obtain the first a dispersion;

[0048] (2) Dilute the first dispersion with 10 mL of dimethyl sulfoxide, transfer it to an airtight glass container, place the glass container in an ultrasonic wave with a power of 150 W for 1 hour, and after cooling to room temperature, centrifuge at 15,000 rpm for 5 Minutes to collect the precipitate;

[0049] (3) Redissolve the precipitate in 50 mL dimethyl sulfoxide and transfer it to a closed glass container, place it in a constant temperature oven at 95°C for 5 hours, cool the resulting reaction solution to room temperature, collect 90% of the supernatant, Obtain the second dispersion liquid;

[0050] (4) Add 45mL dimethyl sulfo...

Embodiment 3

[0054] A preparation method of molybdenum disulfide quantum dots, comprising the steps of:

[0055] (1) 200 mg of molybdenum disulfide powder with a particle size of less than 2 μm is placed in an agate mortar, 0.8 g of 1-butyl-3-methylimidazolium hexafluorophosphate is added and ground for 1 hour in an agate mortar to obtain the first Dispersions;

[0056] (2) Dilute the first dispersion with 10mL of a mixture of dimethylimidazoline and ethanol (the volume ratio of dimethylimidazoline and ethanol is 1:1), transfer it to a closed glass container, and place the glass container at a power of 100W Ultrasonic treatment for 3 hours, after cooling to room temperature, centrifuge at 10,000 rpm for 15 minutes to collect the precipitate;

[0057] (3) Re-dissolve the precipitate in 50mL of a mixture of dimethylimidazoline and ethanol (the volume ratio of dimethylimidazoline and ethanol is 1:1) and transfer it to a closed glass container, and place it in a constant temperature oven at 1...

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Abstract

The invention relates to a molybdenum disulfide quantum dot preparation method which comprises the following steps: (1) putting 200 to 300mg of molybdenum disulfide powder with the particle size not larger than 4mu m into a mortar, adding 1g of ionic liquid and grinding to obtain a first dispersion solution; (2) utilizing an organic solvent to dilute the first dispersion solution, transferring into a sealed glass container, putting the glass container in ultrasonic wave to be treated, centrifuging and collecting precipitate; (3) dissolving the precipitate into the organic solvent again, transferring to the sealed glass container, putting in a 95 to 105 DEG C constant-temperature oven to react 3 to 5 hours and collecting 90% of supernatant liquid to obtain a second dispersion solution; (4) adding the organic solvent into the glass container, evenly shaking and repeating the step (3); (5) evaporating the second dispersion solution in a vacuum and rotary mode and dissolving the second dispersion solution into deionized water again to obtain a molybdenum disulfide quantum dot solution. The preparation method disclosed by the invention can obtain ultra-small molybdenum disulfide quantum dots having good monodispersity and even dimension, and low-cost industrial production can be achieved easily.

Description

technical field [0001] The invention relates to the field of novel nanometer materials, in particular to a method for preparing molybdenum disulfide quantum dots. Background technique [0002] As a graphene-like two-dimensional nanomaterial, layered molybdenum disulfide nanomaterials have many unique physical and chemical properties. The bandgap of molybdenum disulfide nanomaterials is related to the number of layers. When stripped to a single layer, its semiconductor gap will be converted from an indirect bandgap structure to a direct bandgap result, resulting in a larger photon absorption cross-section than graphene and noble metal nanoparticles. , and its fluorescence quantum efficiency is also greatly enhanced. Large specific surface area, large light absorption cross-section, high quantum efficiency, good mechanical properties, and unique bandgap structure make molybdenum disulfide nanomaterials have broad application prospects in optoelectronic devices, sensors, catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06
CPCC01G39/06C01P2002/84C01P2004/10C01P2004/04C01P2004/64
Inventor 汪远昊宋驁天彭晋卿詹宸王墨涵
Owner 深圳理大科技产业有限公司
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