Preparation method of TiO2-Graphene composite material

A technology of composite materials and raw materials, which is applied in the manufacture of fuel cell parts, fuel cells, and final products. It can solve the problems of lack of preferred orientation and easy agglomeration of crystal growth, achieve high electrochemical stability and activity, and improve dispersion. degree, corrosion prevention effect

Inactive Publication Date: 2017-01-11
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing TiO 2 Crystal growth lacks preferred orientation, and most of them are spherical structures with small specific surface area, which are easy to agglomerate, which is not conducive to the full use of TiO 2 Advantages of each with Graphene

Method used

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  • Preparation method of TiO2-Graphene composite material
  • Preparation method of TiO2-Graphene composite material
  • Preparation method of TiO2-Graphene composite material

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0034] see Image 6 , the present invention discloses a TiO 2 -The preparation method of Graphene composite material, described preparation method comprises:

[0035] Step 1. Using flake graphite as raw material, adopting improved Hummer's method to prepare GO solution;

[0036] Step 2. Take 1-butyl-3 methylimidazolium tetrafluoroborate [bmin][BF 4 ], glacial acetic acid and water are fully mixed, then add tetrabutyl titanate drop by drop, stir magnetically until the solution is bright white, and then ultrasonically treat it until it is colorless and transparent, and use microwave-assisted ionothermal method to treat at 180°C for 25min. Obtained TiO 2 The samples were washed several times with deionized water and absolute ethanol, and dried for use;

[0037] TiO 2 The precursor of [bmin][BF was added under acidic conditions 4 ], using microwave-assisted ionothermal method, reacted at 180°C for 25min;

[0038] Step 3. Take different quality GO and TiO respectively 2 Tho...

Embodiment 2

[0041] This embodiment differs from Example 1 in that 20 mg of GO and 80 mg of TiO are used 2 mixed to obtain TiO 2 -Graphene composite material, in which Graphene content is 20%, and the rest is TiO 2 , the other steps are the same as in the first embodiment.

Embodiment 3

[0043] This embodiment differs from Example 1 in that 30 mg of GO and 70 mg of TiO are used 2 mixed to obtain TiO 2 -Graphene composite material, in which Graphene content is 30%, and the rest is TiO 2 ,, other steps are the same as in Embodiment 1.

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Abstract

The invention discloses a preparation method of a TiO2-Graphene composite material. The method comprises the steps of preparing a graphene oxide (GO) solution from flaky graphite as a raw material; fully mixing 1-butyl-3-methylimidazolium tetrafluoroborate, glacial acetic acid and water, dropwise adding tetrabutyl titanate, carrying out magnetic stirring until the solution is bright white, carrying out ultrasonic treatment until the solution is colorless and transparent, carrying out treatment by using a microwave-assisted ionic heat method, washing an obtained TiO2 sample by deionized water and absolute ethyl alcohol for multiple times separately and drying for use; and respectively weighing different quantities of GO and TiO2 for fully mixing, carrying out homogeneous ultrasonic dispersion, carrying out treatment by using a microwave-assisted hydrothermal method, washing the obtained sample by the deionized water and the ethyl alcohol for multiple times separately, carrying out vacuum drying and then obtaining the TiO2-Graphene composite material of different ratios. According to the preparation method of the TiO2-Graphene composite material, the TiO2-Graphene composite material is obtained through microwave-assisted methods; the method is simple and easy to operate, high in reaction speed and short in synthesis time; and the obtained product is high in purity, good in repeatability, high in practicability and low in cost.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a preparation method of a composite material, in particular to a TiO 2 -Preparation method of Graphene composite material. Background technique [0002] Proton exchange membrane fuel cell is a new type of power generation device that directly converts the chemical energy in fuel and oxidant into electrical energy. It has the advantages of high energy conversion efficiency, low starting temperature, quiet and no noise, simple structure, clean and environmental protection, etc. , The optimal power supply for mobile electronic equipment and communication base stations. [0003] Catalyst is the key material of proton exchange membrane fuel cell, which plays a decisive role in battery performance, life and cost. At present, the commonly used catalysts are carbon-supported Pt series, such as Pt / C, Pt-Ru / C, etc., mainly using carbon powder Vulcan XC-72 as the carrier. However, durin...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M8/02H01M8/0239H01M8/0243H01M8/10
CPCH01M4/88H01M8/0223H01M8/1016Y02E60/50Y02P70/50
Inventor 赵新生王敏李建伟魏永生
Owner XUZHOU NORMAL UNIVERSITY
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