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Method for preparing graphene loaded with nano tungsten particles

A technology of nano-tungsten and graphene, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high melting point and unseen problems, and achieve the effect of low cost, strong binding force and small size

Inactive Publication Date: 2019-11-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] As a representative of refractory metals, tungsten has great hardness and high melting point, and has a wide range of applications and irreplaceable status in alloys and composite materials. The method of graphene has not yet seen related reports

Method used

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  • Method for preparing graphene loaded with nano tungsten particles
  • Method for preparing graphene loaded with nano tungsten particles
  • Method for preparing graphene loaded with nano tungsten particles

Examples

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Effect test

example 1

[0023] Weigh 21.9g of sodium chloride, 0.601g of glucose, and 0.615g of ammonium metatungstate into a beaker, weigh 70mL of deionized water into the beaker to dissolve, magnetically stir for 6h, and pour the evenly mixed liquid into a petri dish. Then put the petri dish in the freezer of the refrigerator at -20°C and freeze for 24h; put the frozen sample in the freeze dryer, freeze-drying conditions: -20°C, freeze-drying time 24h. Grind the freeze-dried sample to obtain a precursor composite powder (powder particle size ~ 100 mesh); place the precursor powder in a tube furnace under a hydrogen atmosphere (heating rate 10°C / min, holding temperature 750°C, holding Time 2h, gas flow 200mL / min) high-temperature calcination, after the end of heat preservation, quickly cool to room temperature (down to 100 ℃ within 5 minutes), put the calcined powder in a 500ml beaker, add 400ml deionized water, magnetically stir for 30 minutes, make Sodium chloride is completely dissolved in water, ...

example 2

[0025] Weigh 21.9g of sodium chloride, 0.601g of glucose, and 0.307g of ammonium metatungstate in a beaker, weigh 70mL of deionized water into the beaker to dissolve, magnetically stir for 6h, pour the evenly mixed liquid into a petri dish, Then put the petri dish in the freezer of the refrigerator at -20°C and freeze for 24h; put the frozen sample in the freeze dryer, freeze-drying conditions: -20°C, freeze-drying time 24h. Grind the freeze-dried sample to obtain a precursor composite powder (powder particle size ~ 100 mesh); place the precursor powder in a tube furnace under a hydrogen atmosphere (heating rate 10°C / min, holding temperature 750°C, holding Time 2h, gas flow 200mL / min) high-temperature calcination, after the end of heat preservation, quickly cool to room temperature (down to 100 ℃ within 5 minutes), put the calcined powder in a 500ml beaker, add 400ml deionized water, magnetically stir for 30 minutes, make Sodium chloride is completely dissolved in water, and th...

example 3

[0027] Weigh 21.9g of sodium chloride, 0.601g of glucose, and 0.921g of ammonium metatungstate in a beaker, weigh 70mL of deionized water into the beaker to dissolve, magnetically stir for 6h, and pour the evenly mixed liquid into a petri dish. Then put the petri dish in the freezer of the refrigerator at -20°C and freeze for 24h; put the frozen sample in the freeze dryer, freeze-drying conditions: -20°C, freeze-drying time 24h. Grind the freeze-dried sample to obtain a precursor composite powder (powder particle size ~ 100 mesh); place the precursor powder in a tube furnace under a hydrogen atmosphere (heating rate 10°C / min, holding temperature 750°C, holding Time 2h, gas flow 200mL / min) high-temperature calcination, after the end of heat preservation, quickly cool to room temperature (down to 100 ℃ within 5 minutes), put the calcined powder in a 500ml beaker, add 400ml deionized water, magnetically stir for 30 minutes, make Sodium chloride is completely dissolved in water, an...

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Abstract

The invention relates to a method for preparing graphene loaded with nano tungsten particles. The method comprises the following steps: taking a proper amount of (NH4)6H2W12O40.XH2O, C6H12O6 and NaCl, and adding enough deionized water capable of completely dissolving NaCl to obtain a uniform and transparent precursor solution; freeze-drying to obtain dry solid powder, and grinding to obtain a mixed powder precursor; carrying out high-temperature calcination on the powder precursor obtained in the previous step under atmosphere protection, wherein the atmosphere is hydrogen, raising temperature to 700-780 DEG C, keeping the temperature for a period of time, and carrying out cooling to obtain three-dimensional sodium chloride-graphene loaded nano tungsten particle self-assembly powder; andcarrying out suction filtration on the self-assembly powder prepared in the previous step by using the deionized water, removing NaCl, and drying to obtain the graphene powder loaded with the nano tungsten particles.

Description

Technical field [0001] The invention belongs to the technical field of preparation of nano materials, and specifically relates to an in-situ synthesis method of graphene and a preparation method of loading nano metal particles on graphene. [0002] technical background [0003] Since the discovery of graphene, it has been widely used in the field of structural materials and functional materials due to its ultra-high mechanical properties, excellent thermal conductivity and low density. In the field of structural materials, graphene has an ideal tensile strength of 130 GPa and an elastic modulus of 1 TPa. It can be used as a reinforcement for copper-based, aluminum-based or titanium-based metal-based composite materials, which can greatly improve The strength and elastic modulus of the material, especially the lower density of graphene, make it of great value in the research field of strengthening lightweight metal matrix composites. [0004] However, graphene is far below the expect...

Claims

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Application Information

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IPC IPC(8): B22F9/26C01B32/194
CPCB22F9/26C01B32/194
Inventor 何春年徐志航赵乃勤师春生沙军威
Owner TIANJIN UNIV
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