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Method for preparing P25/nitrogen-doped graphene composite material

A technology of nitrogen-doped graphene and composite materials, which is applied in the field of preparation of graphene-based composite materials, can solve the problems of not being able to obtain defect-free graphene in batches, and cannot obtain composite materials in large quantities, so as to achieve easy industrial production and simple preparation methods , a wide range of effects

Inactive Publication Date: 2013-02-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although graphene can improve the electronic properties of the material, because the existing technology cannot obtain graphene without defects in batches, it is impossible to obtain ideal composite materials in large quantities, which requires finding new methods to compensate for the impact of graphene defects

Method used

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  • Method for preparing P25/nitrogen-doped graphene composite material
  • Method for preparing P25/nitrogen-doped graphene composite material
  • Method for preparing P25/nitrogen-doped graphene composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Weigh 55mg of graphite oxide and disperse it in 55mL of deionized water at room temperature. After the resulting mixture is dispersed evenly by ultrasound, add 55mg of P25 and 0.25mL of hydrazine hydrate solution (50%), and stir evenly to form a reaction solution; (2) Add the reaction solution into the reaction kettle, raise the temperature to 200°C, and react for 12 hours; (3) Cool the obtained product to room temperature, collect the product by centrifugation, wash the product with deionized water, and dry it at 70°C for 16 hours to obtain the P25 / nitrogen-doped graphene composite Material.

[0026] figure 1 It can be seen that the composite material contains P25 type titanium dioxide, and the graphite oxide is reduced to graphene, and doped with a certain amount of nitrogen atoms. . figure 2 It is a Raman spectrum comparison chart of the composite material and graphene oxide. It can be seen that the graphite oxide sheet is well reduced, and the obtained nitro...

Embodiment 2

[0028] (1) Weigh 30mg of graphite oxide and disperse it in 55mL of deionized water at room temperature. After the resulting mixture is dispersed evenly by ultrasonic, add 60mg of P25 and 0.05mL of hydrazine hydrate solution (50%), and stir evenly to form a reaction solution; (2) Add the reaction solution into the reaction kettle, raise the temperature to 180°C, and react for 18 hours; (3) Cool the obtained product to room temperature, collect the product by centrifugation, wash the product with deionized water, and dry it at 60°C for 18 hours to obtain the P25 / nitrogen-doped graphene composite Material. The hydrogen production rate of the composite material is about (3.0mL 氢气 min -1 g 催化剂 -1 ).

Embodiment 3

[0030] (1) Weigh 100mg of graphite oxide and disperse it in 55mL of deionized water at room temperature. After the resulting mixture is dispersed evenly by ultrasonic, add 50mg of P25 and 0.6mL of hydrazine hydrate solution (50%), and stir evenly to form a reaction solution; (2) Add the reaction solution into the reaction kettle, raise the temperature to 210°C, and react for 10 hours; (3) Cool the obtained product to room temperature, collect the product by centrifugation, wash the product with deionized water, and dry it at 80°C for 14 hours to obtain the P25 / nitrogen-doped graphene composite Material. The hydrogen production rate of the composite material is about (3.3mL 氢气 min -1 g 催化剂 -1 ).

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Abstract

The invention relates to a method for preparing a P25 / nitrogen-doped graphene composite material. The method comprises the following steps of 1, dispersing graphite oxide (GO) in deionized water at a room temperature, carrying out uniform ultrasonic dispersion of the mixed solution, adding P25-type titanium dioxide and a hydrazine hydrate solution into the mixed solution, and uniformly stirring to obtain a reaction solution, 2, heating the reaction solution to a temperature of 150 to 210 DEG C and carrying out a reaction process for 8 to 24 hours, and 3, cooling the products to a room temperature, carrying out centrifugation to collect the products, washing the products, and drying to obtain the P25 / nitrogen-doped graphene composite material. The method for preparing the P25 / nitrogen-doped graphene composite material has simple processes and a low cost, is suitable for industrial production, is environmentally friendly, has good repeatability, can be used for a lithium ion battery cathode, and can be used in the fields of photocatalysts and dye-sensitized solar cells.

Description

technical field [0001] The invention belongs to the field of preparation of graphene-based composite materials, in particular to a method for preparing P25 / nitrogen-doped graphene composite materials. Background technique [0002] Graphene is a carbon atom by sp 2 Carbon lattices are tightly arranged to form layered materials similar to honeycomb structures, which have attracted extensive attention from the scientific community in recent years. The electron movement speed of graphene reaches 1 / 300 of the speed of light, that is to say, it far exceeds the movement speed of electrons in general conductors. Many studies expect to achieve the purpose of improving the electrical properties of materials by combining with graphene. In addition, it also has many excellent properties: good thermal conductivity, mechanical properties, chemical stability, large surface area-to-volume ratio, which makes it useful in nanoelectronics, sensors, nanocomposites, batteries, supercapacitors a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/06
CPCY02E60/36
Inventor 李耀刚张飞王宏志张青红
Owner DONGHUA UNIV
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