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High-performance wave-absorbing material core-shell structure CoxFe3-xO4@MoS2 nano-composite and synthesis method thereof

A coxfe3-xo4, nanocomposite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as gaps, and achieve the effects of good absorbing performance, high selectivity, and thin matching thickness

Active Publication Date: 2019-06-28
GUIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a large gap between these composites and the requirements of ideal microwave absorbing materials

Method used

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  • High-performance wave-absorbing material core-shell structure CoxFe3-xO4@MoS2 nano-composite and synthesis method thereof
  • High-performance wave-absorbing material core-shell structure CoxFe3-xO4@MoS2 nano-composite and synthesis method thereof
  • High-performance wave-absorbing material core-shell structure CoxFe3-xO4@MoS2 nano-composite and synthesis method thereof

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Embodiment Construction

[0023] In the actual experiment, the inventors designed and synthesized the core-shell structure Co with different atomic ratios of Co:Fe molar ratios of 1:1, 1:2, 1:3, 1:4 and 1:5. x Fe 3-x o 4 @MoS 2 nanocomposite. The specific synthesis process is based on Co with a molar ratio of Co:Fe of 1:4. 0.6 Fe 2.4 o 4 @MoS 2 Nanocomposites are elaborated as an example. The experimental process is mainly completed in two steps:

[0024] In the first step, Co was synthesized by hydrothermal method 0.6 Fe 2.4 o 4 Nanoparticles as a precursor: 0.249 g of cobalt acetate tetrahydrate (C 4 h 6 CoO 4 4H 2 O) and 1.08g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) ultrasonically dissolve in 30 mL of ethylene glycol solution; then, add 0.9 g of urea to the above-mentioned solution, and after fully dissolving, pour the resulting mixed solution into a reaction kettle, and keep the temperature at 200° C. for 24 hours. Finally, after the whole device is cooled to room temperature,...

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Abstract

The invention discloses a method for synthesizing a high-selectivity core-shell structure CoxFe3-xO4@MoS2 nano-composite. The method includes the steps of controllably synthesizing CoxFe3-xO4 nanoparticles at different Co:Fe atom ratios through a hydrothermal method by adjusting the molar ratio of a Co source to a Fe source to be 1:1, 1:2, 1:3, 1:4 and 1:5, and collecting a large number of black samples through hydrothermal reaction for 10 hours at 180 DEG C through simple washing and drying with the synthesized CoxFe3-xO4 nanoparticles as the early-stage object, ammonium molybdate tetrahydrate as the molybdenum source and thiourea as the sulfur source. It is shown through research results that the type of samples have high dielectric loss and magnetic loss compensation and the nano-composite presents more excellent microwave-absorbing performance compared with currently-reported nano-composites of the same type.

Description

technical field [0001] The invention relates to a design and synthesis scheme of a high-performance wave-absorbing material with strong absorption, thin thickness and wide frequency band. Using the hydrothermal method, through the Co x Fe 3-x o 4 In situ growth of shell MoS on the surface of nanoparticles 2 , to achieve highly selective core-shell structure Co x Fe 3-x o 4 @MoS 2 The synthesis of composites, and this type of composites exhibit very excellent microwave absorption properties. By optimizing the molar ratio of Co:Fe, it was found that when the molar ratio of Co:Fe was 1:4, the synthesized Co 0.6 Fe 2.4 o 4 @MoS 2 The sample has excellent electromagnetic matching, resulting in the composite showing the best absorbing ability, thin matching thickness and wide absorption band. The research results provide a strong scientific basis for the design and development of high-performance absorbing materials. technical background [0002] In recent years, with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
Inventor 祁小四龙林碧秦水介钟伟
Owner GUIZHOU UNIV
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