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Ce-doped Fe-MOF ozone catalyst, and preparation and application thereof

A catalyst, fe-mofs technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problem of low removal and mineralization efficiency, acid site density Small size, low efficiency of catalytic ozone decomposition, etc., to achieve the effect of improving ozone mass transfer adsorption and catalytic decomposition rate, increasing mineralization degree, and promoting decomposition rate

Pending Publication Date: 2020-09-29
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that new-type Fe-MOFs have low surface Lewis acid site density, low efficiency of adsorption and catalytic ozone decomposition, and low efficiency of removal and mineralization of organic pollutants in industrial wastewater, the purpose of the present invention is to provide a Ce-doped Preparation Method of Hetero-Fe-MOFs Ozone Catalyst

Method used

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  • Ce-doped Fe-MOF ozone catalyst, and preparation and application thereof
  • Ce-doped Fe-MOF ozone catalyst, and preparation and application thereof
  • Ce-doped Fe-MOF ozone catalyst, and preparation and application thereof

Examples

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Effect test

Embodiment 1

[0035] A kind of preparation method of Ce-doped Fe-MOFs ozone catalyst, form porous Ce-doped Fe-MOFs ozone catalyst by cerium ion doping Fe-MOFs hydrothermal self-assembly, as follows:

[0036] (1) Under magnetic stirring, according to the molar ratio of water and organic ligand fumaric acid is 500:1, the organic ligand is added into water, and the organic ligand solution is obtained after dissolution;

[0037] (2) A mixed metal salt (cerium nitrate hexahydrate and ferric chloride hexahydrate) with a molar ratio of n(Ce):n(Fe) of 0.20:0.80 was added to the organic ligand fumaric acid solution (where n (Ce): the total molar weight of n (Fe) and the mol ratio of fumaric acid are 1:1), stir to obtain Ce-doped Fe-MOFs ozone catalyst precursor mixed solution;

[0038] (3) Transfer the mixed solution to a stainless steel reaction kettle lined with polytetrafluoroethylene. After hydrothermal reaction at 70 °C for 24 h, centrifuge, precipitate and wash, and vacuum dry at 100 °C for 24...

Embodiment 2

[0046] A kind of preparation method of Ce-doped Fe-MOFs ozone catalyst, as follows:

[0047] (1) Under magnetic stirring, according to the molar ratio of water and organic ligand fumaric acid is 500:1, the organic ligand is added to the aqueous solution, and the organic ligand solution is obtained after the dissolution is complete;

[0048] (2) A mixed metal salt (cerium nitrate hexahydrate and ferric chloride hexahydrate) with a molar ratio of n(Ce):n(Fe) of 0.15:0.85 was added to the organic ligand fumaric acid solution (where n( Ce): in the total molar weight of n (Fe) and the mol ratio of fumaric acid are 1:1), stir to obtain Ce-doped Fe-MOFs ozone catalyst precursor mixed solution;

[0049] (3) Transfer the mixed solution to a stainless steel reaction kettle lined with polytetrafluoroethylene. After hydrothermal reaction at 70 °C for 24 h, centrifuge, precipitate and wash, and vacuum dry at 100 °C for 24 h to obtain porous Ce-doped Fe -MOFs ozone catalyst products.

[0...

Embodiment 3

[0052] A kind of preparation method of Ce-doped Fe-MOFs ozone catalyst, as follows:

[0053] (1) Under magnetic stirring, according to the molar ratio of water and organic ligand fumaric acid is 500:1, the organic ligand is added to the aqueous solution, and the organic ligand solution is obtained after the dissolution is complete;

[0054] (2) A mixed metal salt (cerium nitrate hexahydrate and ferric chloride hexahydrate) with a molar ratio of n(Ce):n(Fe) of 0.10:0.90 was added to the organic ligand fumaric acid solution (where n( Ce): in the total molar weight of n (Fe) and the mol ratio of fumaric acid are 1:1), stir to obtain Ce-doped Fe-MOFs ozone catalyst precursor mixed solution;

[0055] (3) Transfer the mixed solution to a stainless steel reaction kettle lined with polytetrafluoroethylene. After hydrothermal reaction at 70 °C for 24 h, centrifuge, precipitate and wash, and vacuum dry at 100 °C for 24 h to obtain porous Ce-doped Fe -MOFs ozone catalyst products.

[0...

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Abstract

The invention discloses a preparation method of a Ce-doped Fe-MOF ozone catalyst. The Ce-doped Fe-MOF ozone catalyst is formed by cerium ion-doped Fe-MOFs through hydrothermal or solvothermal self-assembling, wherein Fe-MOF is an iron-based metal organic framework material. According to the invention, Lewis acid site density of the surface of the Fe-MOF ozone catalyst is effectively adjusted by utilizing hetero-metal Ce, so the catalytic ozonation activity of the Fe-MOF is improved, the ozone adsorption and catalytic decomposition rate of a Fe-MOF catalytic material is promoted, more active oxygen species such as hydroxyl radicals are further generated, oxidative degradation of organic pollutants in water is enhanced, and the mineralization degree of the organic pollutants is remarkably improved.

Description

technical field [0001] The invention relates to a Ce-doped Fe-MOFs ozone catalyst and its preparation and application, which are used in the field of enhanced treatment of organic wastewater pollution. Background technique [0002] At present, the requirements for industrial water pollution control are high, and the discharge of a large amount of industrial wastewater is difficult to meet the national standard. These wastewater organic pollutants have high concentration, high toxicity, and poor biodegradability, which are difficult to be effectively removed by traditional biological methods alone. Advanced oxidation technology has attracted widespread attention in the wastewater treatment of chemical, printing and dyeing, pharmaceutical and other industries because it can destroy or even mineralize refractory organic pollutants. The oxygen sources involved in the advanced oxidation technology are hydrogen peroxide, persulfate and ozone. Ozone has the following three charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C02F1/78C02F101/30C02F101/34C02F101/38
CPCB01J31/2239C02F1/78C02F1/725B01J2531/842C02F2101/30C02F2101/38C02F2101/345
Inventor 余德游吴明华王莉莉吕晨程杨涛语洪思思李泽雄
Owner ZHEJIANG SCI-TECH UNIV
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