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Preparation method of graphene-based titanium dioxide photocatalyst

A technology of photocatalyst and titanium dioxide, which is applied in the field of photocatalysis, can solve problems such as the difficulty in preparing titanium dioxide composite materials, and achieve the effects of improving photocatalytic performance, improving connection efficiency, and improving stability

Inactive Publication Date: 2020-05-29
绍兴市梓昂新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art, the present invention provides a preparation method of graphene-based titanium dioxide photocatalyst, which solves the problem of difficulty in the preparation of existing graphene-titanium dioxide composite materials, and utilizes the reducibility of titanium monoxide and the oxygen of graphene oxide radical formation reaction, realizing the transformation of titania and the formation of graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of graphene-based titanium dioxide photocatalyst, comprising the steps of:

[0027] Step 1, adding graphene oxide to absolute ethanol and ball milling for 2 hours, evenly spreading it on a flat plate, and extruding and drying to obtain a graphene oxide film;

[0028] Step 2, adding titanium monoxide to distilled water and stirring evenly to form a low-concentration suspension, and then evenly spraying on the surface of the graphene oxide film to obtain a double-layer film;

[0029] Step 3, put the double-layer film in a nitrogen environment, extrude it at a constant temperature for 2 hours, then spray hydrogen peroxide evenly, and roll it at a constant temperature for 2 hours to obtain a multi-film material;

[0030] Step 4, putting the multi-film material into a muffle furnace for sintering for 4 hours to obtain a graphene-based titanium dioxide photocatalyst.

[0031] The mass ratio of graphene oxide and absolute ethanol in the step 1 is 10:1, th...

Embodiment 2

[0038] A preparation method of graphene-based titanium dioxide photocatalyst, comprising the steps of:

[0039] Step 1, adding graphene oxide to absolute ethanol and ball milling for 4 hours, evenly spreading it on a flat plate, and extruding and drying to obtain a graphene oxide film;

[0040] Step 2, adding titanium monoxide to distilled water and stirring evenly to form a low-concentration suspension, and then evenly spraying on the surface of the graphene oxide film to obtain a double-layer film;

[0041] Step 3, put the double-layer film in a nitrogen environment, extrude it at a constant temperature for 4 hours, then spray hydrogen peroxide evenly, and roll it at a constant temperature for 4 hours to obtain a multi-film material;

[0042] Step 4, putting the multi-film material into a muffle furnace for sintering for 6 hours to obtain a graphene-based titanium dioxide photocatalyst.

[0043] The mass ratio of graphene oxide and absolute ethanol in the step 1 is 20:1, th...

Embodiment 3

[0050] A preparation method of graphene-based titanium dioxide photocatalyst, comprising the steps of:

[0051] Step 1, adding graphene oxide to absolute ethanol and ball milling for 3 hours, evenly spreading it on a flat plate, and extruding and drying to obtain a graphene oxide film;

[0052] Step 2, adding titanium monoxide to distilled water and stirring evenly to form a low-concentration suspension, and then evenly spraying on the surface of the graphene oxide film to obtain a double-layer film;

[0053] Step 3, put the double-layer film in a nitrogen environment, extrude it at a constant temperature for 3 hours, then evenly spray hydrogen peroxide, and roll it at a constant temperature for 3 hours to obtain a multi-film material;

[0054] Step 4, put the multi-film material into a muffle furnace and sinter for 5 hours to obtain a graphene-based titanium dioxide photocatalyst.

[0055] The mass ratio of graphene oxide and absolute ethanol in the step 1 is 15:1, the press...

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Abstract

The invention belongs to the field of photocatalysis, and particularly relates to a preparation method of a graphene-based titanium dioxide photocatalyst; graphene oxide as a substrate material and titanium monoxide as a titanium source are used for forming the graphene-nano titanium dioxide composite photocatalyst. According to the preparation method, the problem that an existing graphene titanium dioxide composite material is difficult to prepare is solved, and conversion of titanium dioxide and formation of graphene are realized by utilizing reducibility of titanium monoxide and an oxygen group formation reaction of graphene oxide.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a preparation method of a graphene-based titanium dioxide photocatalyst. Background technique [0002] Graphene is a stable two-dimensional planar functional material with excellent electrical conductivity, light transmission and large specific surface area, so it can show its excellent optical, electrical and catalytic properties. At present, graphene has received extensive attention. By combining graphene with semiconductor nanomaterials, composite materials with excellent properties can be prepared. When the prepared material is irradiated by an excitation light source, photogenerated electrons can be transferred from semiconductor particles to graphene, effectively inhibiting the recombination of photogenerated electrons and holes, improving the lifetime of photogenerated electrons and holes, thereby improving photocatalytic efficiency, significantly Improve the pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/18C02F1/30B01D53/86B01D53/72
CPCB01J21/063B01J21/18C02F1/30B01D53/8668C02F2101/308C02F2305/10B01D2257/704B01D2257/708B01J35/23B01J35/39
Inventor 祁云永
Owner 绍兴市梓昂新材料有限公司
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