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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PUM

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Abstract

The invention discloses a preparation method of a graphene-cerium oxide hybrid material, which comprises the following steps: (1) mixing graphite powder and sodium nitrate, adding concentrated sulfuric acid and potassium permanganate in sequence, stirring and mixing, heating, and then adding Ionized water, add hydrogen peroxide solution dropwise, filter while hot, wash the precipitate, and dry it in vacuum to obtain graphene oxide; (2) Dissolve CeCl3·7H2O in deionized water to obtain solution A; dissolve sodium hydroxide in deionized In ionized water, solution B was obtained; solution B was added dropwise to solution A, filtered, the precipitate was washed, and vacuum-dried to obtain cerium oxide CeO2; (3) Dissolve graphene oxide in deionized water and ultrasonically disperse; then add cerium oxide Stirring, continue the reaction after microwave heating, filter, wash the precipitate, and dry it in vacuum to obtain a graphene-cerium oxide hybrid material. The method is simple to operate, and the prepared graphene-cerium oxide hybrid material has high degradation activity to 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
CPCB01J23/10B01J35/004C02F1/30C02F2101/16C02F2305/10
Inventor 房丁玲
Owner 房丁玲
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