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Preparation method of functionalized modified molybdenum disulfide nanosheet

A technology of molybdenum disulfide and nano-sheets, which is applied in the field of nano-materials, can solve problems such as organic covalent grafting and modification, and achieve the effects of facilitating lubrication, improving friction resistance, and easy operation

Active Publication Date: 2020-08-18
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to MoS 2 There are no functional groups on the surface of the nanosheets that can undergo chemical reactions, so they cannot be directly modified by organic covalent grafting

Method used

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  • Preparation method of functionalized modified molybdenum disulfide nanosheet
  • Preparation method of functionalized modified molybdenum disulfide nanosheet
  • Preparation method of functionalized modified molybdenum disulfide nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Put molybdenum disulfide powder (1.0g), hexachlorocyclotriphosphazene (0.1g) and guanidine hydrochloride (0.2g) into a 100mL stainless steel ball mill jar with 60g stainless steel balls, fill it with nitrogen and seal it at 1400rpm The rotation speed lasts for 2h.

[0029] 2. Put 1.0g of the precursor into the quartz furnace, and set the system temperature at 5°C min -1 The heating rate was raised to 550°C, and then a 2h isothermal process was carried out. After the reaction is finished, after cooling to room temperature, the solid powder is collected and washed to prepare phosphorus and nitrogen-containing molybdenum disulfide nanosheets;

[0030] 3. Disperse the phosphorus-nitrogen-containing molybdenum disulfide nanosheets in deionized water, drop them into an aqueous solution of cobalt nitrate hexahydrate (0.02mol / L), and perform an in-situ reaction; the phosphorus-nitrogen-containing molybdenum disulfide sheets and Co 2+ After the electrostatic adsorption proc...

Embodiment 2

[0034] 1. Put molybdenum disulfide powder (0.5g), hexachlorocyclotriphosphazene (0.1g) and guanidine hydrochloride (0.1g) into a 100mL stainless steel ball mill jar with 60g stainless steel balls, fill it with nitrogen and seal it at 1400rpm The rotation speed lasts for 2h.

[0035] 2. Put 1.0g of the precursor into the quartz furnace, and set the system temperature at 7.5°C·min -1 The heating rate was increased to 550°C, and then an isothermal process was carried out for 2.5h. After the reaction is finished, after cooling to room temperature, the solid powder is collected and washed to prepare phosphorus and nitrogen-containing molybdenum disulfide nanosheets;

[0036] 3. Disperse the phosphorus-nitrogen-containing molybdenum disulfide nanosheets in deionized water, drop them into an aqueous solution of cobalt nitrate hexahydrate (0.02mol / L), and perform an in-situ reaction; the phosphorus-nitrogen-containing molybdenum disulfide sheets and Co 2+ After the electrostatic ads...

Embodiment 3

[0040] 1. Put molybdenum disulfide powder (0.25g), hexachlorocyclotriphosphazene (0.1g) and guanidine hydrochloride (0.15g) into a 100mL stainless steel grinding jar with 60g stainless steel balls, fill it with nitrogen and seal it at 1400rpm The rotation speed lasts for 2h.

[0041] 2. Put 1.0g of the precursor into the quartz furnace, and set the system temperature at 10°C min -1 The heating rate was raised to 550°C, and then a 3h isothermal process was carried out. After the reaction is finished, after cooling to room temperature, the solid powder is collected and washed to prepare phosphorus and nitrogen-containing molybdenum disulfide nanosheets;

[0042] 3. Disperse the phosphorus-nitrogen-containing molybdenum disulfide nanosheets in deionized water, drop them into an aqueous solution of cobalt nitrate hexahydrate (0.02mol / L), and perform an in-situ reaction; the phosphorus-nitrogen-containing molybdenum disulfide sheets and Co 2+ After the electrostatic adsorption pr...

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Abstract

The invention discloses a preparation method of a functionalized modified molybdenum disulfide nanosheet. The preparation method comprises the following steps of: firstly, uniformly mixing phosphonitrilic chloride trimer and guanidine hydrochloride with a given amount of molybdenum disulfide powder through a ball milling method to prepare a molybdenum disulfide nanosheet precursor; putting the precursor into a quartz furnace, preparing an element-doped nanosheet through an annealing process; and finally modifying the surface of a molybdenum disulfide nanosheet with a cobalt boride nanosheet inan in-situ growth manner, and obtaining the functionalized modified molybdenum disulfide nanosheet. The functionalized modified molybdenum disulfide nanosheet provided by the invention is simple in preparation method, low in cost and high in surface modifier content. The prepared modified molybdenum disulfide nanosheet has multifunctionality, for example, the modified molybdenum disulfide nanosheet can be used as a novel solid lubricating material or a hybrid flame retardant with a synergistic effect. In addition, the dispersion state and compatibility of the molybdenum disulfide nanosheet ina polymer matrix is improved, so that the improvement of the comprehensive performance of the polymer material can be benefitted.

Description

technical field [0001] The invention relates to a method for preparing a modified nanometer material, in particular to a method for preparing a functionalized modified molybdenum disulfide nanosheet, which belongs to the field of nanometer materials. Background technique [0002] As an important transition metal sulfide, molybdenum disulfide (MoS 2 ) is widely used in the fields of solid lubricants, hydrodesulfurization catalysts, semiconductor materials, intercalation materials, and lithium batteries due to its hexagonal layered structure. With the rise of nanotechnology, two-dimensional MoS 2 Nanosheets have attracted extensive attention due to their special size and surface-interface properties. Similar to graphene, MoS 2 Nanosheets have good mechanical, thermal and lubricating properties, such as ultra-high mechanical strength and good thermal stability. Therefore, MoS 2 As an advanced two-dimensional material, nanosheets have broad application prospects in the fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06
CPCC01G39/06C01P2002/72C01P2002/82C01P2004/04C01P2004/20
Inventor 邢伟义邱水来王鑫胡源宋磊邹斌
Owner UNIV OF SCI & TECH OF CHINA
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