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Preparation method of molybdenum tin disulfide/tin disulfide nanosheets

A technology of molybdenum disulfide and tin disulfide, which is applied in the field of preparation of heterostructures, can solve the problems of improving the performance of metal disulfides, and achieve the effect of reducing production costs

Active Publication Date: 2020-10-30
NORTHWESTERN POLYTECHNICAL UNIV +1
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Problems solved by technology

[0005] In order to solve the problem that the properties of metal disulfides in the prior art need to be improved, the invention provides a method for preparing tin disulfide molybdenum / tin disulfide nanosheets, and the tin disulfide / molybdenum disulfide / Tin disulfide molybdenum core-shell nanosheets

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  • Preparation method of molybdenum tin disulfide/tin disulfide nanosheets

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preparation example Construction

[0038] The preparation method of molybdenum tin disulfide / tin disulfide nanosheet of the present invention comprises the following steps:

[0039] Sn-doped MoO 3 Nanobelt, SnS 2 Mixing nanosheets with thiourea and using water as solvent for hydrothermal reaction; Sn-doped MoO 3 Nanoribbons and SnS 2 The mass ratio of the nanosheets is 1:(3-5), the amount of thiourea added is 1%-2% of the water mass, and the hydrothermal reaction is carried out in a hydrothermal kettle with polytetrafluoroethylene as the liner. The condition of the hydrothermal reaction is heating at 200-220° C. for 20-40 hours, and cooling naturally after the reaction is completed.

[0040] After fully reacting, naturally cool after the reaction finishes;

[0041] The product obtained by the reaction is centrifugally separated and washed with water to obtain molybdenum tin disulfide / tin disulfide nanosheets. The rotational speed of centrifugal separation is 8000~12000r / min. The molybdenum tin disulfide / t...

Embodiment 1

[0045] Preparation of Sn by hydrothermal method 0.5 Mo 0.5 S 2 / SnS 2 planar heterostructure

[0046] (1) Take 3.0mg Sn-MoO 3 Nanobelt, 15mg SnS 2 Nanosheets, 3.75mmol CS(NH 2 ) 2 Add 20mL deionized water to a hydrothermal kettle with 25mL polytetrafluoroethylene as the liner at the same time;

[0047] (2) Put it into an oven that is heated up to 220°C in advance, and heat at 220°C for 30 hours;

[0048] (3) After the reaction is over, place it in a room temperature environment for natural cooling;

[0049] (4) The gray solid obtained by the reaction is centrifuged at a speed of 8000r / min, washed three times with water to finally obtain the target product Sn 0.5 Mo 0.5 S 2 / SnS 2 planar heterostructure.

[0050] To the product Sn in embodiment 1 0.5 Mo 0.5 S 2 / SnS 2 analysis of planar heterostructures such as figure 1 Shown, Sn 0.5 Mo 0.5 S 2 / SnS 2 The SEM image of the planar heterostructure, which can illustrate the final Sn 0.5 Mo 0.5 S 2 / SnS 2 T...

Embodiment 2

[0058] Preparation of SnS by Hydrothermal Method 2 / Sn 0.5 Mo 0.5 S 2 core-shell structure

[0059] (1) Take 3.0mg Sn-MoO 3 Nanobelt, 15mg SnS 2 Nanosheets, 33mg polyvinylpyrrolidone, 3.75mmolCS(NH 2 ) 2 Add 20mL deionized water to a hydrothermal kettle with 25mL polytetrafluoroethylene as the liner at the same time;

[0060] (2) Put it into an oven that is heated up to 220°C in advance, and heat at 220°C for 30 hours;

[0061] (3) After the reaction is over, place it in a room temperature environment for natural cooling;

[0062] (4) The gray solid obtained by the reaction was centrifuged at a speed of 8000r / min, washed three times with water to finally obtain the target product SnS 2 / Sn 0.5 Mo 0.5 S 2 Core-shell structure.

[0063] To the product SnS in embodiment 2 2 / Sn 0.5 Mo 0.5 S 2 analysis of the core-shell structure, such as Figure 8 Shown, SnS 2 / Sn 0.5 Mo 0.5 S 2 The SEM image of the core-shell structure, which can explain the final SnS 2 / S...

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Abstract

The invention discloses a preparation method of a molybdenum tin disulfide / tin disulfide nanosheet. The preparation method of the molybdenum tin disulfide / tin disulfide nanosheet comprises the steps of mixing an Sn-dopedMoO3 nanoribbon, an SnS2 nanosheet and thiourea according to a certain proportion, and withwater as a solvent, adding the mixture into a hydrothermal kettle with polytetrafluoroethylene as a liner of 25 mL; conducting heating for dozens of hours, and conducting natural cooling after thereaction is finished; and centrifugally separating a product obtained after thereactionto obtainthetin molybdenum disulfide / tin disulfide nanosheet with a plane heterostructure. In addition, a tin disulfide / tin molybdenum disulfide core-shell structure can be obtained through adding a surfaceactive agent for reducing surface energy. The preparation method of the molybdenum tin disulfide / tin disulfide nanosheet comprises the steps of mixing the Sn-dopedMoO3 nanoribbon, the SnS2 nanosheet,polyvinylpyrrolidone and the thiourea according to a certain proportion, and with water as the solvent, adding the mixtureinto ahydrothermal kettle with polytetrafluoroethylene as alinerof 25 mL; conductingheating for dozens of hours, and conductingnatural cooling after thereactionis finished; and centrifugally separating the product obtained after thereactionto obtain a tin sulfide / tin molybdenum disulfide nanosheet with a core-shell structure.

Description

technical field [0001] The invention relates to the field of preparation of heterostructures, in particular to a preparation method of molybdenum tin disulfide / tin disulfide nanosheets. Background technique [0002] After graphene was successfully prepared in 2004, two-dimensional materials have attracted extensive attention from researchers due to their unique physical and chemical properties and atomic-level thickness. Among many graphene-like two-dimensional materials, layered metal disulfides (such as tungsten disulfide, molybdenum disulfide, and tin disulfide) exhibit excellent structural, electrical, optical, chemical, and thermodynamic properties, making them suitable for electronic, Catalysis, energy conversion and sensing have great application prospects. [0003] Studies have found that the crystal structure, morphology, geometric arrangement, and composition of metal dichalcogenides are extremely important for the performance of electronic devices. For example, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/00C01G19/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G19/00C01G39/006C01P2002/72C01P2002/85C01P2004/03C01P2004/20C01P2004/84
Inventor 王晓珊黄晓黄维
Owner NORTHWESTERN POLYTECHNICAL UNIV
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