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Stable compound photocatalyst of ordered porous structure, production method and application of stable compound photocatalyst of ordered porous structure

A technology of porous structure and complex light, which is applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve secondary pollution and destroy the order of photocatalytic materials Porous structure and other issues, to achieve the effect of simple operation, good repeatability and high output

Inactive Publication Date: 2020-02-07
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, as a heterogeneous photocatalyst, the central metal ion Fe of Fe-based MOFs materials 3+ Dissolution in aqueous solution will not only destroy the ordered porous structure of photocatalytic materials, but also easily cause secondary pollution of the environment

Method used

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  • Stable compound photocatalyst of ordered porous structure, production method and application of stable compound photocatalyst of ordered porous structure
  • Stable compound photocatalyst of ordered porous structure, production method and application of stable compound photocatalyst of ordered porous structure
  • Stable compound photocatalyst of ordered porous structure, production method and application of stable compound photocatalyst of ordered porous structure

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Experimental program
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Effect test

Embodiment 1

[0018] MIL-100 (Fe) / MIL-53 (Fe) composite photocatalyst in the present embodiment, wherein the mass ratio of MIL-100 (Fe) and MIL-53 (Fe) is 1:1.

[0019] The preparation method of above-mentioned MIL-100 (Fe) / MIL-53 (Fe) composite photocatalyst, comprises the following steps:

[0020] (1) Dissolve iron powder, trimesic acid, hydrofluoric acid and nitric acid in distilled water at a molar ratio of 1:0.66:2:1.2, transfer the mixed solution to a reaction kettle, and carry out hydrothermal heating at a temperature of 150 °C The reaction time was 12 h, centrifuged at a speed of 5000 r / min, washed with distilled water and absolute ethanol three times, and dried in vacuum at 60 °C for 6 h to obtain MIL-100 (Fe) photocatalyst.

[0021] (2) Dissolve ferric nitrate nonahydrate and terephthalic acid in N,N-dimethylformamide at a molar ratio of 1:1, transfer the mixed solution to a reaction kettle, and perform solvothermal heating at a temperature of 150 °C The reaction time was 15 h, c...

Embodiment 2

[0025] MIL-100 (Fe) / MIL-53 (Fe) composite photocatalyst in the present embodiment, wherein the mass ratio of MIL-100 (Fe) and MIL-53 (Fe) is 1:20.

[0026] The preparation method of above-mentioned MIL-100 (Fe) / MIL-53 (Fe) composite photocatalyst, comprises the following steps:

[0027] (1) Dissolve iron powder, trimesic acid, hydrofluoric acid and nitric acid in distilled water at a molar ratio of 1:0.66:2:1.2, transfer the mixed solution to a reaction kettle, and carry out hydrothermal heating at a temperature of 160 °C The reaction time was 14 h, centrifuged at 6000 r / min, washed with distilled water and absolute ethanol four times, and dried in vacuum at 70 °C for 7 h to obtain MIL-100 (Fe) photocatalyst.

[0028] (2) Dissolve ferric nitrate nonahydrate and terephthalic acid in N,N-dimethylformamide at a molar ratio of 1:1, transfer the mixed solution to a reaction kettle, and perform solvothermal heating at a temperature of 160 °C The reaction time was 17 h, centrifuged ...

Embodiment 3

[0032] MIL-100 (Fe) / MIL-53 (Fe) composite photocatalyst in the present embodiment, wherein the mass ratio of MIL-100 (Fe) and MIL-53 (Fe) is 1:100.

[0033] The preparation method of above-mentioned MIL-100 (Fe) / MIL-53 (Fe) composite photocatalyst, comprises the following steps:

[0034] (1) Dissolve iron powder, trimesic acid, hydrofluoric acid and nitric acid in distilled water at a molar ratio of 1:0.66:2:1.2, transfer the mixed solution to a reaction kettle, and carry out hydrothermal heating at a temperature of 170 °C The reaction time was 16 h, centrifuged at 7000 r / min, washed 5 times with distilled water and absolute ethanol, and dried in vacuum at 80 °C for 8 h to obtain MIL-100 (Fe) photocatalyst.

[0035] (2) Dissolve ferric nitrate nonahydrate and terephthalic acid in a molar ratio of 1:1 in N,N-dimethylformamide, transfer the mixed solution to a reaction kettle, and perform solvothermal heating at a temperature of 170 °C The reaction time was 19 h, centrifuged at...

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Abstract

The invention discloses a production method of a stable compound photocatalyst of an ordered porous structure. The compound photocatalyst of the ordered porous structure is generated by combining iron-based metal organic framework (MOFs) materials MIL-100 (Fe) and MIL-53 (Fe) through electrostatic force. The production method of the stable compound photocatalyst of the ordered porous structure comprises the following steps: with iron powder, hydrofluoric acid, nitric acid and trimesic acid as raw materials and distilled water as a solvent, using a hydrothermal method for producing the MIL-100(Fe); with ferric nitrate nonahydrate and terephthalic acid as raw materials and N,N-dimethylformamide as a solvent, using a solvothermal method for producing the MIL-53 (Fe); and then subjecting an aqueous solution with a certain ratio of the MIL-100 (Fe) to the MIL-53 (Fe) to a stirring reaction to obtain the compound photocatalyst of the ordered porous structure. The compound photocatalyst withthe mass ratio of the MIL-100 (Fe) to the MIL-53 (Fe) of 1:1 has enhanced visible light absorption and structure stability, and the compound photocatalyst has a good photocatalytic degradation effecton a toxic pollutant microcystic toxin (MC-LR) in water.

Description

technical field [0001] The patent of the invention relates to a preparation method of a stable ordered porous structure composite photocatalyst, which belongs to the technical field of composite materials. Background technique [0002] Metal-organic frameworks (MOFs) are a class of functional materials with ordered porous structures formed by the combination of metal ions and bridging organic ligands. Due to the characteristics of large specific surface area, high porosity, adjustable pore size and shape, and easy functionalization of structure, MOFs materials are widely used in research fields such as adsorption and catalytic degradation of environmental pollutants. MOFs materials can effectively adsorb and enrich pollutant molecules on their surfaces, and then generate active oxide species to degrade pollutants in situ through photoexcitation. Therefore, MOFs materials have certain development potential as photocatalysts for practical environmental pollution control. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J35/10C02F1/30C02F101/38
CPCB01J31/1691B01J31/223C02F1/30B01J2523/842C02F2101/38C02F2305/10B01J35/61B01J35/60B01J35/39
Inventor 黄应平田海林方艳芬彭钦天黑梦云李张丽陈云龙
Owner CHINA THREE GORGES UNIV