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Preparation method of graphene oxide-based catalytic material

A catalytic material, graphene technology, applied in the field of materials, can solve problems such as the influence of photocatalytic performance, and achieve the effect of good photocatalytic activity

Inactive Publication Date: 2017-11-28
张家港市汇鼎新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on the modification of Bi2O3 is still in its infancy, and graphene has unique conductive properties. 2 o 3 Composite, will contrast Bi 2 o 3 have a significant impact on the photocatalytic performance, and research in this area has not been reported

Method used

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Examples

Experimental program
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preparation example Construction

[0017] The invention discloses a preparation method based on graphene oxide catalytic material, comprising:

[0018] (1) Add deionized water and polyethylene glycol to graphene oxide, stir, and ball mill for 10 to 15 minutes to obtain pasty graphene oxide;

[0019] (2) Mix the paste graphene oxide and bismuth nitrate pentahydrate according to the mass ratio of 1:1~3, ball mill for 2~10 hours, add alkaline solution to adjust the pH value to 9~10, let stand, filter, and collect the precipitate The object is washed and dried to obtain a graphene oxide-bismuth hydroxide composite;

[0020] (3) Calcining the graphene oxide-bismuth hydroxide composite at 300-600° C. for 1-2 hours in a nitrogen atmosphere to obtain a graphene oxide-bismuth trioxide catalytic material.

[0021] In the above step (1), the mass fraction of graphene oxide in the paste graphene oxide is 70-85%, preferably, the mass fraction of graphene oxide in the paste graphene oxide is 70-80%, More preferably, the ma...

Embodiment

[0027] 1. Preparation of graphene oxide

[0028] 1) Mix 25mL of concentrated sulfuric acid, 2.5g of potassium persulfate, 2.5g of phosphorus pentoxide and 1g of graphite, slowly raise the temperature to 80°C, react for 5h, wash until neutral, and dry to obtain pre-oxidized graphite;

[0029] 2) Add 30mL of concentrated sulfuric acid to the above-mentioned pre-oxidized graphite, stir well, put it in an ice-water bath to cool, slowly add 2g of potassium permanganate, slowly raise the temperature to 35°C, react for 1.5h, add deionized water, and control the reaction The temperature was kept at 95°C, the reaction was continued for 15 minutes, deionized water and 10 mL of hydrogen peroxide were added, centrifuged, washed, and dried in a vacuum oven at 60°C for 12 hours to obtain graphene oxide.

[0030] 2. Preparation of catalytic materials based on graphene oxide

[0031] (1) add deionized water and polyethylene glycol to graphene oxide, stir, ball mill 10~15min, obtain the pasty...

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Abstract

The invention discloses a preparation method of a graphene oxide-based catalytic material. The preparation method comprises the following steps: (1) adding deionized water and polyethylene glycol into graphene oxide, stirring the mixture, and ball-milling the same for 10-15min to obtain paste graphene oxide; (2) mixing the paste graphene oxide with bismuth nitrate pentahydrate in a weight ratio of 1: (1-3), ball-milling the mixture for 2-10h, adding a sodium hydroxide solution to adjust the pH value to 9-10, leaving the mixture to stand, filtering the same, collecting a precipitate and washing the precipitate, and drying the precipitate to obtain a graphene oxide-bismuth hydroxide compound; and (3) calcining the graphene oxide-bismuth hydroxide compound for 1-2h at 300-600 DEG C in a nitrogen atmosphere to obtain the graphene oxide-bismuth trioxide catalytic material. According to the graphene oxide-based catalytic material disclosed by the invention, bismuth trioxide can be uniformly dispersed on the surface of graphene oxide, so that the graphene oxide-based catalytic material has relatively good photocatalytic activity.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a method for preparing a graphene oxide-based catalytic material. Background technique [0002] At present, the seriousness of environmental pollution has become a focal issue that directly threatens the survival of human beings and urgently needs to be resolved. Photocatalytic technology is a green technology that has been gradually developed since the 1970s and has important application prospects in the fields of energy and the environment. This technology can oxidize and decompose organic pollutants in the environment, and finally degrade them into CO 2 , water and inorganic ions and other small molecules, so no secondary pollution, high degree of degradation is considered to be the most promising pollution treatment method. [0003] Bismuth-based semiconductor photocatalysts can be excited by visible light, have good photocatalytic activity, and can effectively degrade or...

Claims

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Application Information

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IPC IPC(8): B01J23/18
CPCB01J23/18B01J35/39
Inventor 陆伟
Owner 张家港市汇鼎新材料科技有限公司
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