Preparation method, product and application of ferrous doped Fe-MOFs Fenton-like catalyst

A catalyst, fe-mofs technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of insufficient density of coordinative unsaturated metal centers, organic Contaminant removal and mineralization efficiency is not high, low redox cycle rate and other problems, to achieve the effect of rich pore structure, accelerated cycle, positive redox potential

Pending Publication Date: 2021-01-12
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Due to the inherent structure of the new Fe-MOFs, there is a relatively low Fe(III) / Fe(II) redox cycle rate and insufficient density of coordinatively unsaturated metal centers. The removal and mineralization efficiency are not high, and the purpose of the present invention is to provide a preparation method of Fe(II) doped Fe-MOFs Fenton-like catalyst

Method used

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  • Preparation method, product and application of ferrous doped Fe-MOFs Fenton-like catalyst
  • Preparation method, product and application of ferrous doped Fe-MOFs Fenton-like catalyst
  • Preparation method, product and application of ferrous doped Fe-MOFs Fenton-like catalyst

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Embodiment 1

[0044] A preparation method of Fe(II)-doped Fe-MOFs Fenton-like catalyst, which forms a porous Fe(II)-doped Fe-MOFs-Fenton-like catalyst through ferrous ion-doped Fe-MOFs solvothermal self-assembly, according to Follow the steps below:

[0045] (1) Under magnetic stirring, according to the molar ratio of N,N dimethylformamide and organic ligand terephthalic acid is 500:1, add the organic ligand into the N,N dimethylformamide solution and dissolve completely After obtaining the organic ligand terephthalic acid solution;

[0046] (2) Add n(Fe(II)):n(Fe) mixed metal salts (ferrous chloride tetrahydrate and ferric chloride hexahydrate) with a molar ratio of 0.30:0.70 to the organic ligand terephthalic acid solution (wherein the molar ratio of the total molar weight of n(Fe(II)):n(Fe) to terephthalic acid is 1:1), stir evenly to obtain Fe(II) doped Fe-MOFs Fenton-like catalyst precursor Body mixed solution;

[0047] (3) Transfer the mixed solution to a stainless steel reaction k...

Embodiment 2

[0060] A kind of preparation method of Fe (II) doped Fe-MOFs class Fenton catalyst, as follows:

[0061] (1) Under magnetic stirring, according to the molar ratio of N,N-dimethylformamide (DMF) and organic ligand terephthalic acid is 500:1, the organic ligand is added to the DMF solution, and the organic ligand is obtained after dissolution is complete. Ligand terephthalic acid solution;

[0062] (2) Add n(Fe(II)):n(Fe) mixed metal salts (ferrous chloride tetrahydrate and ferric chloride hexahydrate) with a molar ratio of 0.20:0.80 to the organic ligand terephthalic acid solution (wherein the total molar ratio of n(Fe(II)):n(Fe) to terephthalic acid is 1:1), stir well to obtain Fe(II) doped Fe-MOFs Fenton catalyst Precursor mixed solution;

[0063] (3) Transfer the mixed solution to a stainless steel reaction kettle lined with polytetrafluoroethylene. After solvothermal reaction at 150 °C for 3 h, centrifuge, precipitate and wash, and dry at 100 °C for 24 h to obtain porous ...

Embodiment 3

[0066] A kind of preparation method of Fe (II) doped Fe-MOFs class Fenton catalyst, as follows:

[0067] (1) Under magnetic stirring, according to the molar ratio of N,N-dimethylformamide (DMF) and organic ligand terephthalic acid is 500:1, the organic ligand is added to the DMF solution, and the organic ligand is obtained after dissolution is complete. Ligand terephthalic acid solution;

[0068] (2) Add n(Fe(II)):n(Fe) mixed metal salts (ferrous chloride tetrahydrate and ferric chloride hexahydrate) with a molar ratio of 0.10:0.90 to the organic ligand terephthalic acid solution (wherein the molar ratio of the total molar weight of n(Fe(II)):n(Fe) to terephthalic acid is 1:1), stir evenly to obtain Fe(II) doped Fe-MOFs Fenton-like catalyst precursor Body mixed solution;

[0069] (3) Transfer the mixed solution to a stainless steel reaction kettle lined with polytetrafluoroethylene. After solvothermal reaction at 150 °C for 3 h, centrifuge, precipitate and wash, and dry at 1...

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Abstract

The invention provides a preparation method, a product and application of a ferrous doped Fe-MOFs Fenton-like catalyst. The preparation method comprises the following steps: dissolving an organic ligand in a solvent to obtain an organic ligand solution; adding a mixed metal salt of a ferric salt and a ferrous salt into the organic ligand solution, and conducting uniform stirring to obtain a ferrous doped Fe-MOFs Fenton-like catalyst precursor mixed solution; and carrying out a solvothermal reaction on the mixed solution, and then carrying out solid-liquid separation and solid-phase drying to obtain the ferrous doped Fe-MOFs Fenton-like catalyst. The ferrous doped Fe-MOFs Fenton-like catalyst can improve Fenton-like mass transfer adsorption and catalytic decomposition rate and the efficiency of catalyzing Fenton-like oxidative degradation and mineralizing organic pollutants in water. The catalyst is applied to the field of organic wastewater pollution treatment, the catalytic Fenton-like activity of Fe-MOFs can be improved, the decomposition rate of Fenton-like reactions is promoted, and removal of organic pollutants in water is enhanced.

Description

technical field [0001] The invention belongs to the technical field of enhanced treatment of organic wastewater pollution, and in particular relates to a preparation method, product and application of a ferrous-doped Fe-MOFs-like Fenton catalyst. Background technique [0002] In recent years, people's calls for green chemistry and green life are getting higher and higher, and the problem of industrial water pollution has become increasingly acute. Industrial wastewater is different from conventional domestic wastewater. It mainly contains a large number of organic additives and intermediates, as well as some organic small molecule compounds. It has outstanding characteristics such as complex components, good chemical stability, and biodegradability. The advanced treatment technology represented by advanced oxidation method can form OH species with higher oxidation activity in its system, and its reaction ability and rate of degrading organic matter are greatly improved compa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C02F1/72C02F101/30C02F101/34C02F101/38
CPCB01J31/1691B01J31/2239C02F1/725C02F1/722B01J2531/842C02F2305/026C02F2101/30C02F2101/345C02F2101/34C02F2101/38
Inventor 余德游杨涛语吴明华徐李聪李超
Owner ZHEJIANG SCI-TECH UNIV
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