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Ultrahigh-concentration stripping method for transition metal sulfides

A transition metal and sulfide technology, applied in the field of viscous slurry, can solve the problems of low dispersion concentration, high production cost, and difficulty in scale-up production of peeling products, and solve the problem of macro-production, low cost, and low method cost. Effect

Active Publication Date: 2018-06-15
ZHEJIANG SHANYU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional liquid-phase exfoliation method usually has a low yield, and the dispersion concentration of the exfoliated product is low, so the production cost is high and it is difficult to scale up the production

Method used

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  • Ultrahigh-concentration stripping method for transition metal sulfides
  • Ultrahigh-concentration stripping method for transition metal sulfides
  • Ultrahigh-concentration stripping method for transition metal sulfides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Dissolve 1g of triethanolamine oleic acid soap in 20mL of deionized water under stirring conditions. After it is completely dissolved, add the solution and 10g of molybdenum disulfide into the ball milling tank, add ball milling beads, and ball mill at 300rpm for 20h. A thick slurry was obtained.

[0030] (2) Dilute the viscous slurry obtained in (1) with 480 mL of deionized water, stir for 30 minutes, and then let stand to separate layers. The upper layer is exfoliated molybdenum disulfide dispersion, and the lower layer is incompletely exfoliated molybdenum disulfide.

[0031] (3) Collect the precipitate in (2) and ball mill for 10 hours, and the other operating conditions are the same as in (1). After the second ball milling, the precipitate in (2) was completely stripped.

Embodiment 2

[0033] (1) Dissolve 1g of sodium dioctyl sulfosuccinate in 40mL of deionized water under stirring conditions. After completely dissolving, add the solution and 10g of molybdenum disulfide into the ball mill tank. Ball milled for 24 hours to obtain a viscous slurry.

[0034] (2) Dilute the viscous slurry obtained in (1) with 480 mL of deionized water, stir for 30 minutes, and then let stand to separate layers. The upper layer is exfoliated molybdenum disulfide dispersion, and the lower layer is incompletely exfoliated molybdenum disulfide.

[0035] (3) Collect the precipitate in (2) and ball mill for 12 hours, and the other operating conditions are the same as in (1). After the second ball milling, the precipitate in (2) was completely stripped.

Embodiment 3

[0037] (1) Dissolve 1g of sodium dioctyl sulfosuccinate in 40mL of deionized water under stirring conditions. After completely dissolving, add the solution and 10g of molybdenum disulfide into the ball mill tank. Ball milled for 24 hours to obtain a viscous slurry.

[0038] (2) Dilute the viscous slurry obtained in (1) with 480 mL of deionized water, stir for 30 minutes, and then let stand to separate layers. The upper layer is exfoliated molybdenum disulfide dispersion, and the lower layer is incompletely exfoliated molybdenum disulfide.

[0039] (3) Collect the precipitate in (2) and ball mill for 12 hours, and the other operating conditions are the same as in (1). After the second ball milling, the precipitate in (2) was completely stripped.

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Abstract

The invention provides an ultrahigh-concentration stripping method for transition metal sulfides. The method concretely comprises the following steps: (1) mixing the transition metal sulfides with anaqueous solution or an organic solvent solution of an assistant, and processing the obtained mixture in a ball mill or a sand mill a period of time to form a viscous slurry; (2) diluting the formed viscous slurry with the corresponding solvent, stirring the slurry and the corresponding solvent for 0.5 h, and standing the obtained solution to layer the solution in order to obtain an upper layer which is a stripped transition metal sulfide suspension and a precipitate which is thick-layer transition metal sulfides which are not completely stripped off; and (3) collecting the precipitate obtainedin step (2), and performing ball-milling or sanding again for a period of time to further improve the stripping yield. The complete stripping of the transition metal sulfides can be achieved after the above two-stage treatment. The highest stripping concentration in the invention can reach 1000 mg / mL. The method has the advantages of safe and controllable process, high efficiency, easiness in industrial amplification, and no pollution to the environment.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to an ultra-high-concentration stripping method of transition metal sulfides, specifically, ball milling or sanding a transition metal sulfide body in an aqueous solution or an organic solution of an auxiliary agent for a period of time to form a viscous slurry material; the formed slurry is diluted with water or corresponding solvent, and after stirring for 30 minutes, it is allowed to stand for stratification. The transition metal sulfides can be completely exfoliated after secondary sanding or ball milling. Background technique [0002] Since the discovery of graphene in 2004, two-dimensional materials including transition metal sulfides, transition metal oxides / hydroxides, and boron nitride have attracted extensive attention from academia and industry due to their excellent comprehensive properties. Different from graphene with zero band gap, transition metal sulfides have a ...

Claims

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Application Information

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IPC IPC(8): C01G39/06C01G41/00
CPCC01G39/06C01G41/00
Inventor 卢红斌张佳佳
Owner ZHEJIANG SHANYU TECH CO LTD