A method for controlling the synthesis of molybdenum disulfide particles in a mixed solvent system

A mixed solvent system and molybdenum disulfide technology, applied in the direction of molybdenum sulfide, etc., can solve the problems of uncontrollable molybdenum disulfide structure, cumbersome preparation process design, and inability to meet the use requirements, achieving high repeatability and controllability of experimental results Good, easy-to-handle effects

Active Publication Date: 2020-10-16
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] The hydrothermal method is one of the commonly used technologies for the synthesis of molybdenum disulfide micro-nano particles. However, the traditional hydrothermal method still has problems such as uncontrollable molybdenum disulfide structure, large and uneven particle size, and the preparation process. The design is cumbersome and the control conditions are demanding, which cannot meet the needs of use

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  • A method for controlling the synthesis of molybdenum disulfide particles in a mixed solvent system
  • A method for controlling the synthesis of molybdenum disulfide particles in a mixed solvent system
  • A method for controlling the synthesis of molybdenum disulfide particles in a mixed solvent system

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[0050] The molybdenum disulfide product prepared by the preparation method is used in single or composite form in lithium ion batteries, sodium ion batteries, photocatalysis and related fields.

[0051] The technical solutions of the present invention will be further described below in conjunction with specific examples.

Embodiment 1

[0052] Embodiment 1: take by weighing 450mg sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) and 600mg thiourea (SC(NH 2 ) 2 ), stirred and dissolved in 25ml of deionized water to obtain a clear, transparent solution; 4 parts of the above solution were prepared in parallel; 10ml of deionized water, 10ml of n-propanol, 10ml of isopropanol and 10ml of cyclohexanol were added to the 4 parts of the solution , and stirred for 30 minutes to obtain solution 1, solution 2, solution 3 and solution 4 respectively; the above four solutions were respectively placed in a 50ml polytetrafluoroethylene reactor, and reacted at 200°C for 24h; the reaction product was naturally cooled to After room temperature, open reaction container, centrifuge with deionized water and ethanol, wash 3 times, obtain black powder 1 (solution 1 gained), black powder 2 (solution 2 gained), black powder 3 (solution 2 gained) respectively after natural drying again. 3), black powder 4 (obtained from solution 4). ...

Embodiment 2

[0055] Embodiment 2: 450mg sodium molybdate dihydrate (Na 2 MoO 4 2H 2 O) and 600mg thiourea (SC(NH 2 ) 2 ) was stirred and dissolved in 25ml deionized water to obtain a clear, transparent solution; PVP powder was added to the solution and stirred for 30min to obtain solutions with PVP concentrations of 0.002, 0.008 and 0.02g / ml respectively, which were respectively designated as solution 5 and solution 6 and solution 7; add 10ml isopropanol respectively in 3 kinds of solutions, obtain water-isopropanol mixed solvent system after stirring; The reaction was carried out at ℃ for 24 hours; after the obtained product was naturally cooled to room temperature, the reaction container was opened, centrifuged and washed 3 times with deionized water and ethanol, and then dried naturally to obtain black powder 5 (obtained from solution 5) and black powder 6 respectively. (obtained from solution 6), black powder 7 (obtained from solution 7).

[0056] The above product was subjected t...

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Abstract

The invention discloses a method for controlling synthesis of molybdenum disulfide particles in a mixed solvent system, and belongs to preparation methods of transition metal sulfide materials. The method for controlling synthesis of the molybdenum disulfide particles in the mixed solvent system includes the steps: taking a molybdenum source and a sulfur source as reaction raw materials in a hydrothermal system to prepare the molybdenum disulfide micro-nano-particles; effectively regulating microstructures of the molybdenum disulfide particles by different types of mixed solvents; adding surfactants to control the sizes and the dispersion degree of the molybdenum disulfide particles; controlling synthesis of the molybdenum disulfide micro-nano-particles by the mixed solvents and the surfactants. The method has the advantages that used raw materials are low in price and easy to obtain, the synthesis method is simple in operation, experimental results are high in repeatability, productsis large in quantity and high in purity, the method can be applied to large-scale production, and the prepared molybdenum disulfide materials have wide application prospects in the fields of lithium-ion batteries, sodium-ion batteries, photocatalysis and the like.

Description

technical field [0001] The invention relates to a preparation method of a transition metal sulfide, in particular to a method for controlling the synthesis of molybdenum disulfide particles in a mixed solvent system. Background technique [0002] Lithium-ion batteries have become an essential part of our lives, such as electronic watches, smart phones, laptops, electric vehicles, etc. As we all know, the anode materials used in today's commercial lithium-ion batteries are basically graphite. However, due to the low specific capacity of graphite materials, the reversible capacity is only 372mA / g, which greatly limits the development of lithium-ion batteries. In recent years, the exploration and development of high-capacity anode materials (such as silicon materials, tin-based materials, transition metal oxides, transition metal sulfides, etc.) has become a hot research topic in this field. [0003] For transition metal sulfides with a layered structure, on the one hand, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/06
Inventor 王鹏周含宇
Owner CHINA UNIV OF MINING & TECH
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