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Preparation method of titanium dioxide-graphene oxide composite

A technology of titanium dioxide and graphene, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of easy agglomeration, low catalytic efficiency, small specific surface area, etc., and achieve the goal of increasing catalytic efficiency Effect

Inactive Publication Date: 2014-09-24
ZHANGJIAGANG MAOAN TRADING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, titanium dioxide / graphene oxide composites mainly exist in the form of spheres, which are prone to agglomeration, small specific surface area, and low catalytic efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of titanium dioxide / graphene oxide composite, comprising the following steps:

[0020] Anatase titanium dioxide powder was dissolved in water, fully stirred at a speed of 10,000 rpm to obtain a homogeneous aqueous solution of titanium dioxide with a mass fraction of 0.5 wt%,

[0021] The graphene oxide powder is dissolved in water, fully stirred at a rotating speed of 10000 rpm to obtain a homogeneous aqueous solution of graphene oxide with a mass fraction of 1 wt%.

[0022] Titanium dioxide aqueous solution and graphene oxide aqueous solution are mixed in a mass ratio of 1:9, fully stirred, and polyethylene oxide powder with a molecular weight of 100,000 is added to the solution while stirring to obtain a uniform solution. The quality of the polyethylene oxide powder is the mixed solution. 4wt% by mass,

[0023] The mixed solution of titanium dioxide / graphene oxide / polyethylene oxide obtained is added to the solution supply device, the spinning vo...

Embodiment 2

[0025] A preparation method of titanium dioxide / graphene oxide composite, comprising the following steps:

[0026] Anatase titanium dioxide powder was dissolved in water, fully stirred at a speed of 10,000 rpm to obtain a homogeneous aqueous solution of titanium dioxide with a mass fraction of 1 wt%.

[0027] The graphene oxide powder is dissolved in water, fully stirred at a rotating speed of 10000 rpm to obtain a homogeneous aqueous solution of graphene oxide with a mass fraction of 0.5 wt%,

[0028] Titanium dioxide aqueous solution and graphene oxide aqueous solution are mixed in a ratio of 9:1 in mass ratio, fully stirred, and polyethylene oxide powder with a molecular weight of 1,000,000 is added to the solution while stirring to obtain a uniform solution. The quality of the polyethylene oxide powder is the mixed solution. 8wt% by mass,

[0029] The mixed solution of titanium dioxide / graphene oxide / polyethylene oxide obtained is added to the solution supply device, the ...

Embodiment 3

[0031] A preparation method of titanium dioxide / graphene oxide composite, comprising the following steps:

[0032] Anatase titanium dioxide powder was dissolved in water, fully stirred at a speed of 12000 rpm to obtain a homogeneous aqueous solution of titanium dioxide with a mass fraction of 0.6 wt%.

[0033] The graphene oxide powder is dissolved in water, fully stirred at a rotating speed of 12000 rpm to obtain a homogeneous aqueous solution of graphene oxide with a mass fraction of 1 wt%.

[0034] Titanium dioxide aqueous solution and graphene oxide aqueous solution are mixed in a mass ratio of 7:3, fully stirred, and polyethylene oxide powder with a molecular weight of 800,000 is added to the solution while stirring to obtain a uniform solution. The quality of the polyethylene oxide powder is the mixed solution. 5wt% by mass,

[0035] The mixed solution of titanium dioxide / graphene oxide / polyethylene oxide obtained is added to the solution supply device, the spinning vol...

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Abstract

The invention relates to the technical fields of chemistry and photocatalysis and particularly relates to a preparation method of a titanium dioxide-graphene oxide composite. The preparation method comprises the following steps: firstly, respectively preparing an aqueous solution of titanium dioxide and an aqueous solution of graphene oxide; mixing the aqueous solutions to obtain a mixed solution; dissolving the mixed solution in polyethylene oxide to obtain a mixture serving as a spinning aid; and performing electrostatic spinning to obtain the titanium dioxide / graphene oxide composite. According to the preparation method of the titanium dioxide / graphene oxide composite, titanium dioxide / graphene oxide are processed into a nanometer fiber structure by virtue of an electrostatic spinning technology, and on the premise that no agglomeration is ensured, the catalytic efficiency is increased.

Description

technical field [0001] The invention relates to the technical fields of chemistry and photocatalysis, in particular to a preparation method of a titanium dioxide / graphene oxide composite. Background technique [0002] Photocatalytic technology has a wide range of applications in many fields such as wastewater treatment, gas purification, sterilization, self-cleaning materials, dye-sensitized solar cells, cosmetics, and gas sensors. At present, most of the photocatalysts are N-type semiconductors, among which titanium dioxide is the most commonly used photocatalyst because of its non-toxic, high catalytic activity, strong oxidation ability, good stability, cheap and easy to obtain. Titanium dioxide has three crystal forms: anatase, rutile and brookite. Previous research reports generally believe that the activity of anatase is the highest. [0003] Titanium dioxide is an important raw material for the preparation of inorganic materials. Its particle size is between 1nm and 1...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 徐靖
Owner ZHANGJIAGANG MAOAN TRADING
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