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Method for preparing graphene and titanium dioxide composite material by vapor phase reduction method

A technology of titanium dioxide and composite materials, applied in the direction of titanium dioxide, graphene, titanium oxide/hydroxide, etc., to achieve the effect of increasing porosity, improving electrical conductivity, and excellent performance

Active Publication Date: 2013-01-16
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there are few methods to make graphene and titanium dioxide into a uniform composite slurry (see Xu Du, Ivan Skachko, Fabian Duerr, Adina Luicanl & Eva Y.Andrei, Nature 462,192(2009))

Method used

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  • Method for preparing graphene and titanium dioxide composite material by vapor phase reduction method
  • Method for preparing graphene and titanium dioxide composite material by vapor phase reduction method
  • Method for preparing graphene and titanium dioxide composite material by vapor phase reduction method

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Effect test

Embodiment 1

[0024] 1) Acidification treatment: Titanium dioxide powder is pretreated. The acid solution is nitric acid with a mass concentration of 10%. The acid solution has a mass of 6g and is added dropwise to 6g of titanium dioxide powder. The average particle size of titanium dioxide is 1nm.

[0025] (2) Preparation of slurry: Prepare a graphene oxide solution with a concentration of 0.1g / L, and add it dropwise to the titanium dioxide slurry in step (1). After adding the graphene oxide solution to 60L, add 6g of methanol dropwise organic solvent, stir.

[0026] (3) Curing slurry: Add curing agent polyethylene glycol (polymerization degree: 2000) and p-isooctylphenyl ether (abbreviation: Laton X-100) to the slurry in step (2), the amount added 3g and 3g respectively, then stir. Add 6g high molecular polymer again, high molecular polymer is methyl cellulose, stir.

[0027] (4) Concentrated slurry: the slurry obtained in step (3) was distilled at 80°C to obtain a graphene-composite ti...

Embodiment 2

[0031] 1) Acidification treatment: use nitric acid with a mass concentration of 90% of the acid solution, the mass of the acid solution is 100g, and add it dropwise to 1g of titanium dioxide powder. The average particle size of titanium dioxide is 100μm.

[0032] (2) Preparation of slurry: prepare graphene oxide solution, the concentration of graphene oxide solution is 100g / L, add it to the titanium dioxide powder in step (1), after adding to 1L, add an organic solvent, the organic solvent is methanol and The addition amount of isopropanol, organic solution is respectively 50g and 50g, then stirs.

[0033] (3) Curing slurry: Add curing agent polyethylene glycol (polymerization degree: 20,000) and alkylphenol polyoxyethylene ether (abbreviation: OP-10 emulsifier) ​​to the container in step (2), and the addition amount is After 50g and 50g, then stir, then add macromolecular polymer, macromolecular polymer is methyl cellulose and hydroxypropyl cellulose, respective quality is re...

Embodiment 3

[0038] (1) Acidification treatment: add 100 g of nitric acid solution with a mass concentration of 65% to 100 g of titanium dioxide powder dropwise, and the average particle size of titanium dioxide is 10 μm.

[0039] (2) Preparation of slurry: prepare a graphene oxide solution with a concentration of 1g / L, add dropwise to the titanium dioxide powder in step (1), add 22g of methanol and 72g of ethanol dropwise as an organic solvent after adding to 1L , then stir.

[0040] (3) Curing slurry: add curing agent terpineol and alkylphenol polyoxyethylene ether (referred to as OP-10 emulsifier) ​​to the container in step (2), the addition amount is 500g and 500g respectively, then stir, add High molecular polymer, high molecular polymer is methyl cellulose and ethyl cellulose, the respective quality is 500g and 500g, stirs.

[0041] (4) Concentrated slurry: the slurry obtained in step (3) was distilled at 30°C to obtain graphene-composite titanium dioxide slurry, the concentration o...

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Abstract

The invention relates to a method for preparing a graphene and titanium dioxide composite material by a vapor phase reduction method. The method comprises the following steps of: acidizing titanium dioxide powder; adding a prepared graphene aqueous solution into a titanium dioxide solution which is acidized; adding an organic solvent, and stirring to obtain slurry; adding a curing agent and high-molecular polymer cured slurry, and distilling to obtain concentrated graphene composite titanium dioxide slurry; printing the slurry on a substrate by a silk screen; and heating for reducing under the action of reducing gas to obtain the graphene and titanium dioxide composite material. The composite material obtained by the method provides an excellent electrode material for the subsequent manufacturing of dye-sensitized batteries, quantum dot sensitized batteries and photoelectrocatalysis equipment. According to the method, a preparation process is simple and convenient, and the novel composite material with high performance is provided for the field of solar battery materials in the future.

Description

Technical field: [0001] The invention relates to a method for preparing a graphene and titanium dioxide composite material, in particular to a method for preparing a graphene and titanium dioxide composite material by a gas phase reduction method. Background technique: [0002] In the past 20 years, carbon has aroused great interest of researchers all over the world. Since fullerenes and carbon nanotubes were discovered by scientists, three-dimensional diamonds, two-dimensional graphites, one-dimensional carbon nanotubes, and zero-dimensional fullerene spheres have formed a complete carbon family. Among them, graphite has always been a research hotspot because of its special lamellar structure. Graphite itself is not a real two-dimensional material, but a single layer of graphite carbon atomic layer (Graphene) is a carbon material with a quasi-two-dimensional structure. The single-layer graphite carbon atomic layer refers to graphite with a C atomic layer thickness, and a ...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01G23/047C01B32/184
Inventor 暴宁钟查晨阳何大方王仙
Owner NANJING UNIV OF TECH
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