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Preparation method of graphene-CeO2 hybrid material

A graphene, cerium oxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as low catalytic efficiency, and achieve high catalytic activity, high degradation activity, and simple operation. Effect

Inactive Publication Date: 2018-04-06
房丁玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are cerium oxide and graphene composite materials that can photocatalytically oxidize organic pollutants. However, CeO-graphene hybrid photocatalysts have few catalysts for degrading ammonia nitrogen, and there is a problem of low catalytic efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of graphene-cerium oxide hybrid material includes the following steps:

[0019] (1) Preparation of graphene oxide: mix graphite powder and sodium nitrate, then add concentrated sulfuric acid and potassium permanganate in sequence, stir and mix, react at 20°C for 2h, then heat up to 40°C and react for 30min, add to the system Add 5 times the volume of concentrated sulfuric acid to deionized water, continue to react for 20 minutes, and then drop a 5% mass concentration hydrogen peroxide solution into the system, filter while hot, and wash the precipitate with 5% mass concentration hydrochloric acid solution and water When there is no sulfate ion in the filtrate, the precipitate is vacuum dried at 40°C for 4 hours to obtain graphene oxide; among them, the addition ratio of graphite powder, sodium nitrate, concentrated sulfuric acid, potassium permanganate, and hydrogen peroxide solution is 2g : 1g: 50mL: 6g: 10mL;

[0020] (2) Preparation of cerium oxide...

Embodiment 2

[0023] The preparation method of graphene-cerium oxide hybrid material includes the following steps:

[0024] (1) Preparation of graphene oxide: mix graphite powder and sodium nitrate, then add concentrated sulfuric acid and potassium permanganate in turn, stir and mix, react at 20°C for 2h, then heat up to 35°C and react for 30min, add to the system Add 5 times the volume of concentrated sulfuric acid to deionized water, continue to react for 20 minutes, and then drop a 5% mass concentration hydrogen peroxide solution into the system, filter while hot, and wash the precipitate with 5% mass concentration hydrochloric acid solution and water When there is no sulfate ion in the filtrate, the precipitate is vacuum dried at 40°C for 4 hours to obtain graphene oxide; among them, the addition ratio of graphite powder, sodium nitrate, concentrated sulfuric acid, potassium permanganate, and hydrogen peroxide solution is 2g : 1g: 50mL: 6g: 10mL;

[0025] (2) Preparation of cerium oxide: ta...

Embodiment 3

[0028] The preparation method of graphene-cerium oxide hybrid material includes the following steps:

[0029] (1) Preparation of graphene oxide: mix graphite powder and sodium nitrate, then add concentrated sulfuric acid and potassium permanganate in sequence, stir and mix, react at 20°C for 2h, then heat to 38°C and react for 30min, add to the system Add 5 times the volume of concentrated sulfuric acid to deionized water, continue to react for 20 minutes, and then drop a 5% mass concentration hydrogen peroxide solution into the system, filter while hot, and wash the precipitate with 5% mass concentration hydrochloric acid solution and water When there is no sulfate ion in the filtrate, the precipitate is vacuum dried at 40°C for 4 hours to obtain graphene oxide; among them, the addition ratio of graphite powder, sodium nitrate, concentrated sulfuric acid, potassium permanganate, and hydrogen peroxide solution is 2g : 1g: 50mL: 6g: 10mL;

[0030] (2) Preparation of cerium oxide: t...

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Abstract

The invention discloses a preparation method of a graphene-CeO2 hybrid material. The preparation method comprises the following steps: (1) mixing graphite powder and sodium nitrate, adding concentrated sulfuric acid and potassium permanganate sequentially, stirring, mixing and heating the materials, adding deionized water, adding a hydrogen peroxide solution dropwise, performing filtering while the mixture is hot, washing precipitates and drying the precipitates in vacuum to obtain graphene oxide; (2) dissolving CeCl3.7H2O in deionized water to obtain a solution A; dissolving sodium hydroxidein deionized water to obtain a solution B; adding the solution B dropwise to the solution A, filtering the mixed solution, washing precipitates and drying the precipitates in vacuum to obtain CeO2; (3) dissolving graphene oxide in deionized water, and ultrasonically dispersing the solution; adding CeO2, performing stirring, microwave heating, continuous reaction and filtering, washing precipitatesand drying the precipitates in vacuum to obtain the graphene-CeO2 hybrid material. The method is simple to operate, and the prepared graphene-CeO2 hybrid material has high degradation activity on ammonia nitrogen.

Description

Technical field [0001] The invention belongs to the technical field of photocatalysts, and specifically relates to a preparation method of a graphene-cerium oxide hybrid material. Background technique [0002] Traditional sewage denitrification often adopts nitrification-denitrification method, which is easily affected by factors such as environmental temperature, mud year, pollutant composition, and its denitrification efficiency is not stable enough and takes a long time. Therefore, it is necessary to develop new denitrification technologies. [0003] In 1972, the photoelectric catalytic decomposition of water to produce hydrogen was reported; subsequently, TiO 2 Degradation of polychlorinated phenols pioneered the application of semiconductor photocatalysts in water pollution control. The photocatalytic method can oxidize organic matter, reduce heavy metal ions and kill bacteria. So this technology has broad application prospects. Cerium oxide (CeO 2 ) Is a kind of TiO 2 Semi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10C02F1/30C02F101/16
CPCC02F1/30B01J23/10C02F2305/10C02F2101/16B01J35/39
Inventor 房丁玲
Owner 房丁玲
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