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Preparation method of graphene-based photocatalytic material

A photocatalytic material and graphene-based technology, applied in the field of graphene, can solve the problems of graphene structure damage, unfavorable photocatalytic activity, poor composite effect, etc., and achieve the effects of increasing concentration, being conducive to large-scale preparation, and simple process.

Active Publication Date: 2018-06-22
宁夏简墨碳素新材有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although there are many literatures reporting graphene composite photocatalysts and their preparation methods, there are still many problems, such as poor composite effect, a lot of free graphene in the composite, severe graphene agglomeration, and serious graphene structure damage. and other conditions are not conducive to the improvement of photocatalytic activity

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  • Preparation method of graphene-based photocatalytic material
  • Preparation method of graphene-based photocatalytic material

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Effect test

Embodiment 1

[0033] A kind of preparation method of graphene-based photocatalytic material, described preparation method comprises the steps:

[0034] Step 1, adding graphene to deionized water, adding a dispersant, and ultrasonically reacting for 1 hour to obtain a graphene dispersion;

[0035] Step 2, adding the graphene dispersion into the hydrochloric acid solution, reacting with microwave for 2 hours, feeding ammonia gas under reflux and reacting with microwave for 2 hours, to obtain ammoniated graphene solution;

[0036] Step 3, adding zinc acetate to the aqueous ethanol solution, feeding ammonia gas for aeration and reflux for 1 hour to form a mixed solution;

[0037] Step 4, the mixed solution was distilled under reduced pressure for 2 hours, and left standing at constant pressure for 1 hour to obtain a viscous solution;

[0038] Step 5, slowly drop the ammoniated graphene solution into the viscous liquid, and react with microwave for 5 hours at the same time to obtain a photocata...

Embodiment 2

[0050] A kind of preparation method of graphene-based photocatalytic material, described preparation method comprises the steps:

[0051] Step 1, adding graphene to deionized water, adding a dispersant, and ultrasonically reacting for 3 hours to obtain a graphene dispersion;

[0052] Step 2, adding the graphene dispersion into the hydrochloric acid solution, reacting with microwave for 5 hours, feeding ammonia gas under reflux and reacting with microwave for 4 hours, to obtain ammoniated graphene solution;

[0053] Step 3, adding zinc acetate to the aqueous ethanol solution, feeding ammonia gas for aeration and reflux for 4 hours to form a mixed solution;

[0054] Step 4, the mixed solution was distilled under reduced pressure for 4 hours, and left standing at constant pressure for 3 hours to obtain a viscous solution;

[0055]Step 5, slowly drop the ammoniated graphene solution into the viscous liquid, and react with microwave for 8 hours at the same time to obtain a photoca...

Embodiment 3

[0067] A kind of preparation method of graphene-based photocatalytic material, it is characterized in that: described preparation method comprises the steps:

[0068] Step 1, adding graphene to deionized water, adding a dispersant, and ultrasonically reacting for 2 hours to obtain a graphene dispersion;

[0069] Step 2, adding the graphene dispersion into the hydrochloric acid solution, reacting with microwave for 4 hours, feeding ammonia gas under reflux and reacting with microwave for 3 hours, to obtain ammoniated graphene solution;

[0070] Step 3, adding zinc acetate to the aqueous ethanol solution, feeding ammonia gas for aeration and reflux for 3 hours to form a mixed solution;

[0071] Step 4, the mixed solution was distilled under reduced pressure for 3 hours, and left standing at constant pressure for 2 hours to obtain a viscous solution;

[0072] Step 5, slowly drop the ammoniated graphene solution into the viscous liquid, and react with microwave for 6 hours at the...

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Abstract

The invention belongs to the technical field of graphene, and particularly relates to a preparation method of a graphene-based photocatalytic material. The preparation method comprises the following steps: adding graphene and a dispersing agent into deionized water, and adding hydrochloric acid and ammonia gas for performing a microwave reaction to obtain an ammonified graphene solution; adding zinc acetate into ethanol water, introducing ammonia gas for performing an aeration backflow reaction, and performing a reduced-pressure distillation reaction and a constant-pressure standing reaction to obtain a thick liquid; then, dropwise adding the thick liquid into the ammonified graphene solution, meanwhile, performing the microwave reaction to obtain a photocatalytic dilute solution, and performing a secondary reduced-pressure distillation on the photocatalytic dilute solution to obtain the graphene photocatalytic material. According to the preparation method, the graphene is introduced,so that the visible light absorbing performance of a catalyst is improved effectively; meanwhile, the separation between photoexcitation electrons and holes is facilitated, so that the quantum efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a preparation method of a graphene-based photocatalytic material. Background technique [0002] In 2010, scientists Geim and Novoselov from the University of Manchester won the Nobel Prize in Physics for their outstanding contributions to the discovery of graphene and further research on its properties. Graphene represents a conceptually novel class of materials that are only one atom thick. The introduction of graphene has brought continuous surprises to low-dimensional physics and continued to provide fertile ground for application fields. [0003] The unique two-dimensional structure of graphene has many excellent properties. The introduction of graphene materials has enabled many technologies and methods in the previous field to be further improved and improved. The excellent properties of graphene can just make up for the shortcomings of other materials, thus ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J37/34
CPCB01J23/06B01J37/346B01J35/39
Inventor 刘伟金阳
Owner 宁夏简墨碳素新材有限公司
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