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Nitrogen-sulfur co-doped graphene composite material loaded with three-way high-efficiency denitrification and anti-sulfur catalyst and preparation method thereof

A technology of nitrogen and sulfur co-doping and composite materials, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve good sulfur resistance performance

Active Publication Date: 2021-11-30
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Carrier-free MnO x -CeO 2 The catalyst has the highest low-temperature SCR activity in such reports so far, NO at 120°C x can be converted almost completely to N 2 , but there is no suitable technology to successfully in situ grow it on nitrogen-sulfur co-doped graphene

Method used

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  • Nitrogen-sulfur co-doped graphene composite material loaded with three-way high-efficiency denitrification and anti-sulfur catalyst and preparation method thereof
  • Nitrogen-sulfur co-doped graphene composite material loaded with three-way high-efficiency denitrification and anti-sulfur catalyst and preparation method thereof
  • Nitrogen-sulfur co-doped graphene composite material loaded with three-way high-efficiency denitrification and anti-sulfur catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Accurately weigh 0.1g of the above-mentioned sample of self-made nitrogen-doped graphene oxide, dissolve it in 50mL of deionized water, add 0.06g of sodium dodecyl sulfate (SDS for short) after ultrasonication for 10min, and then dissolve 0.1g of Cerium acetate (referred to as Ce(Ac) 3 ) into the prepared above solution, put in a stirrer, and stir at room temperature for 1 hour until Ce(Ac) 3 completely dissolved. Then weigh 0.111g of tin tetrachloride (SnCl 4 ), added to the above solution, and continued to stir at room temperature for 1 hour until SnCl 4 completely dissolved. Then accurately weigh 0.100gKMnO 4 Dissolve in 50mL of deionized water, and then add to the above reaction solution. Continue to react at room temperature for 1h, weigh 0.1g thiourea (abbreviated as CH 4 N 2 S) Add it into the reaction liquid, stir until the reaction lasts for 4 hours, after the end of the reaction, centrifuge and wash the obtained suspension several times, then vacuum free...

Embodiment 2

[0033] Accurately weigh 0.1g of the above sample of self-made nitrogen-doped graphene oxide, dissolve it in 50mL of deionized water, add 0.06g of sodium dodecyl sulfate (SDS for short) after ultrasonication for 10min, and then dissolve 0.15g of Cerium acetate (referred to as Ce(Ac) 3 ) into the prepared above solution, put in a stirrer, and stir at room temperature for 1 hour until Ce(Ac) 3 completely dissolved. Then weigh 0.165g of tin tetrachloride (SnCl 4 ), added to the above solution, and continued to stir at room temperature for 1 hour until SnCl 4 completely dissolved. Then accurately weigh 0.149gKMnO 4 Dissolve in 50mL of deionized water, and then add to the above reaction solution. Continue to react at room temperature for 1h, weigh 0.15g thiourea (abbreviated as CH 4 N 2 S) Add it into the reaction liquid, stir until the reaction lasts for 4 hours, after the end of the reaction, centrifuge and wash the obtained suspension several times, then vacuum freeze-dry ...

Embodiment 3

[0036] Accurately weigh 0.1g of the above sample of self-made nitrogen-doped graphene oxide, dissolve it in 50mL of deionized water, add 0.06g of sodium dodecyl sulfate (SDS for short) after ultrasonication for 10min, and then dissolve 0.15g of Cerium acetate (referred to as Ce(Ac) 3 ) into the prepared above solution, put in a stirrer, and stir at room temperature for 1 hour until Ce(Ac) 3 completely dissolved. Then weigh 0.221g of tin tetrachloride (SnCl 4 ), added to the above solution, and continued to stir at room temperature for 1 hour until SnCl 4 completely dissolved. Then accurately weigh 0.199gKMnO 4 Dissolve in 50mL of deionized water, and then add to the above reaction solution. Continue to react at room temperature for 1h, weigh 0.2g thiourea (abbreviated as CH 4 N 2 S) Add it into the reaction liquid, stir until the reaction lasts for 4 hours, after the end of the reaction, centrifuge and wash the obtained suspension several times, then vacuum freeze-dry t...

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Abstract

The invention discloses a nitrogen-sulfur co-doped graphene composite material (marked as Mn-Ce-SnOx / rGO-N,S) loaded with a three-way high-efficiency denitrification and anti-sulfur catalyst and a preparation method thereof. After in-situ growth of highly efficient denitrification and anti-sulfur three-way catalysts on heterographene oxide, nitrogen and sulfur co-doping are carried out while graphene oxide is reduced to prepare nitrogen-sulfur co-doped graphene catalyst composites. Due to the in-situ growth method, the three-way catalyst is uniformly and firmly loaded on the surface of nitrogen-sulfur co-doped graphene; the overall synthesis of the present invention is carried out in a low-temperature environment, and the reaction synthesis method and operation are very simple, and its reaction is fast , there is no specific requirement for the reaction vessel, and the synthetic substance does not pollute the environment. The synthesized catalyst and nitrogen-sulfur co-doped graphene are firmly combined, have a long service life and a high out-of-stock rate.

Description

technical field [0001] The invention belongs to the technical field of functional doped graphene composite catalysts, in particular to a nitrogen-sulfur co-doped graphene composite material loaded with a three-way high-efficiency denitrification and anti-sulfur catalyst and a preparation method thereof. Background technique [0002] With the rapid development of China's industrialization process, many inevitable pollutions have been produced, among which air pollution is the most serious and the most concerned issue among many pollutions. The generation of air pollution has caused people's life, health, work and social Nature has suffered relatively severe damage. At present, air pollution sources can be divided into fixed pollution sources and mobile pollution sources. The pollutants of the pollution sources are mainly produced by coal combustion, including PM2.5, PM10, sulfur dioxide, nitrogen oxides and nitrogen dioxide, etc. These gases will affect the environment. Caus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J23/34B01J35/10B01J37/16B01J37/12B01D53/86B01D53/56
CPCB01J27/24B01J23/34B01J35/10B01J37/16B01J37/12B01D53/8628B01J21/18B01J2523/00B01J37/32B01J37/06B01D2251/2062B01D2255/2065B01D2255/707B01D2255/2073B01D2255/702B01D2255/2094B01D2258/0283B01J2523/3712B01J2523/43B01J2523/72
Inventor 郑玉婴郑伟杰
Owner FUZHOU UNIV
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