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Nonlinear nano hybrid material based on vanadium carbide and molybdenum disulfide and preparation method

A nanometer hybrid material, vanadium carbide nanotechnology, applied in chemical instruments and methods, molybdenum oxide/molybdenum hydroxide, carbon compounds, etc., can solve problems such as restricted use, and achieve the effect of improving nonlinear performance

Active Publication Date: 2021-12-24
TONGJI UNIV
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Problems solved by technology

However, these materials have the disadvantage
For example, graphene has zero bandgap and no intrinsic bandgap, while black phosphorus is sensitive to air and water, limitations that limit their use in many devices

Method used

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  • Nonlinear nano hybrid material based on vanadium carbide and molybdenum disulfide and preparation method
  • Nonlinear nano hybrid material based on vanadium carbide and molybdenum disulfide and preparation method
  • Nonlinear nano hybrid material based on vanadium carbide and molybdenum disulfide and preparation method

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preparation example Construction

[0037] The preparation method of the nonlinear nano-hybrid material based on vanadium carbide and molybdenum disulfide comprises the following steps:

[0038] (1) Vanadium aluminum carbide (V 2 AlC) is etched in hydrogen fluoride solution to obtain vanadium carbide (V 2 C), stripping vanadium carbide in tetramethylammonium hydroxide to obtain (smaller) vanadium carbide nanosheets;

[0039] (2) Dissolve the sulfur source and the molybdenum source in deionized water, stir (preferably adopt the mode of vigorous stirring) to form a homogeneous solution, add a surfactant, add vanadium carbide nanosheets, disperse evenly, and synthesize them by high-temperature hydrothermal method to obtain the obtained The described nonlinear nanohybrid material based on vanadium carbide and molybdenum disulfide.

[0040]In the invention, the vanadium aluminum carbide is first etched in a hydrogen fluoride solution, and then stripped in tetramethyl ammonium hydroxide. Then, the raw materials for...

Embodiment 1

[0047] Preparation of nonlinear nano-hybrid materials based on vanadium carbide and molybdenum disulfide (see Figure 6 ):

[0048] 20mL of hydrogen fluoride solution (40%) was deoxygenated, nitrogen was bubbled for 20min, and then 1g of vanadium aluminum carbide was added, the etching reaction temperature was 35°C, and the etching reaction time was 96h. After the reaction, add deionized water to wash, centrifuge at 3000rpm to obtain solid powder until the pH of the supernatant is greater than 6, and collect solid vanadium carbide after drying. The vanadium carbide obtained by etching was stripped in 10 mL of tetramethylammonium hydroxide in a nitrogen environment, reacted at room temperature for 24 hours, and centrifuged to collect vanadium carbide nanosheets with smaller nanometer size.

[0049] 0.7105 g of thiourea and 0.3621 g of ammonium heptamolybdate tetrahydrate were dissolved in 21.8 mL of deionized water, and stirred vigorously with a magnet until a homogeneous solu...

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Abstract

The invention relates to a nonlinear nano hybrid material based on vanadium carbide and molybdenum disulfide and a preparation method. The material is formed by uniformly growing molybdenum disulfide on the surface of vanadium carbide. Compared with the prior art, the heterojunction of the vanadium carbide and the tungsten disulfide is prepared by stacking Van der Waals force between the vanadium carbide and the tungsten disulfide; and through the synergistic effect between the vanadium carbide and the tungsten disulfide, the third-order nonlinear coefficient of the hybrid material is enhanced. According to the invention, based on the interaction force between the vanadium carbide and the tungsten disulfide, molybdenum disulfide nanosheets uniformly grow on the surface of the vanadium carbide with the three-dimensional interconnected network microstructure; a scanning electron microscope spectrum proves the surface appearance of the heterojunction; and through the synergistic effect of the vanadium carbide and the tungsten disulfide, the heterojunction shows excellent potential as an optical material under femtosecond and nanosecond test conditions.

Description

technical field [0001] The invention belongs to the field of functional composite materials, and in particular relates to a nonlinear nano-hybrid material based on vanadium carbide and molybdenum disulfide and a preparation method thereof. Background technique [0002] The design and synthesis of novel third-order nonlinear optical materials are very popular, including optical switches, optical clipping, logic devices, image transmission, and mode-locked laser systems. Inverse saturable absorption, saturable absorption, nonlinear scattering, and nonlinear refraction are the most commonly observed nonlinear optical behaviors. Two-dimensional materials have been extensively studied. Since the discovery of graphene in 2004, carbon derivatives, metal oxides, transition metal dichalcogenides, black phosphorus, metal carbides, and nitrides have all been studied. However, these materials have disadvantages. For example, graphene has a band gap of zero and no intrinsic band gap, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/914C01G39/02
CPCC01B32/914C01G39/02C01P2002/72C01P2002/82C01P2004/03C01P2006/60
Inventor 张弛单娜滢伏露露
Owner TONGJI UNIV
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