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Iron-based metal-organic framework porous composite material modified by coordination modulator and its preparation method and application

A technology of porous composite materials and iron-based metals, which is applied in the field of preparation of porous crystal materials, can solve the problems of poor visible light absorption capacity, complex preparation, and low specific surface area, so as to improve adsorption capacity and photocatalytic activity, strong visible light absorption capacity, Good photocatalytic activity

Active Publication Date: 2022-06-07
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing MIL-53(Fe) composite materials have the problems of complex preparation, high cost, poor stability and poor treatment effect
In addition, the main defect in the existing AgI-loaded metal-organic framework composites is that there are fewer effective adsorption sites, which makes AgI easy to agglomerate when used as a co-catalyst. The existence of the above-mentioned defects also makes the AgI-loaded metal-organic framework composites still There are defects such as low specific surface area, low porosity, poor visible light absorption capacity, poor photocatalytic activity, and poor stability, which greatly limit the wide application of co-catalyzed metal-organic framework composites.

Method used

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  • Iron-based metal-organic framework porous composite material modified by coordination modulator and its preparation method and application
  • Iron-based metal-organic framework porous composite material modified by coordination modulator and its preparation method and application
  • Iron-based metal-organic framework porous composite material modified by coordination modulator and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0042] An iron-based metal-organic framework porous composite material modified by a coordination modulator. Uniformly dispersed silver iodide nanoparticles use carboxyl groups as effective loading sites, and are loaded on the iron-based metal-organic framework material modified by a coordination modulator.

[0043] In this embodiment, the mass percentage of silver iodide nanoparticles in the iron-based metal-organic framework porous composite material modified by the coordination modulator is 20%.

[0044] In this embodiment, the iron-based metal organic framework material modified by the coordination modulator is MIL-53(Fe) modified by the coordination modulator.

[0045] A preparation method of the iron-based metal-organic framework porous composite material modified by the coordination modulator of the present embodiment, comprising the following steps:

[0046] (1) 0.674g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) and 0.415 g of terephthalic acid (H 2 BDC) was added ...

Embodiment 2

[0075] An application of an iron-based metal-organic framework porous composite material modified by a coordination modulator for treating antibiotic wastewater, specifically using the iron-based metal-organic framework porous composite material modified by a coordination modulator to treat sulfamethazine wastewater, comprising: The following steps:

[0076] According to the addition amount of 0.5g / L, the iron-based metal-organic framework porous composite material (AgI / D-MIL-53(Fe)) modified by the coordination modulator prepared in Example 1 was mixed with an initial concentration of 20mg / L The sulfamethazine wastewater was mixed with the sulfamethazine wastewater, and the sulfamethazine wastewater was oscillated and adsorbed for 60 min under dark conditions. After reaching the adsorption saturation, the photocatalytic reaction was carried out under the condition of visible light irradiation with a wavelength greater than 400 nm for 60 min to complete the treatment of the sul...

Embodiment 3

[0082] The effect of iron-based metal-organic framework porous composites modified by coordination modulators with different loadings of AgI on the treatment effect of antibiotic wastewater was investigated, specifically:

[0083]According to the addition amount of 0.5 g / L, the iron-based metal-organic framework porous composites (10% AgI / D-MIL-53(Fe), 20% AgI / D- MIL-53(Fe), 30%AgI / D-MIL-53(Fe), 40%AgI / D-MIL-53(Fe)) were mixed with sulfamethazine wastewater with an initial concentration of 20mg / L, and the results were obtained in the dark. Under the condition of oscillating adsorption for 60min, after reaching adsorption saturation, photocatalytic reaction was carried out for 60min under the condition of visible light irradiation with wavelength greater than 400nm, and the treatment of sulfamethazine wastewater was completed.

[0084] In this example, the iron-based metal-organic framework porous composite material (20%AgI / D-MIL-53(Fe)) modified by the coordination modulator i...

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Abstract

The invention discloses an iron-based metal-organic framework porous composite material modified by a coordination modulator and its preparation method and application. The composite material comprises an iron-based metal-organic framework material modified by a coordination modulator and loaded thereon of silver iodide nanoparticles. Its preparation method includes organic acid and Fe 3+ / terephthalic acid solution is mixed for microwave heating reaction, and the obtained product is mixed with iodide ion solution and silver ion solution for reaction to obtain the composite material. The composite material of the present invention has the advantages of high crystallinity, high specific surface area, high porosity, strong visible light absorption capacity, good photocatalytic activity and good stability, and is a new type of porous crystal material with excellent performance, which can effectively remove Antibiotic pollutants have high use value and good application prospects. At the same time, the preparation method has the advantages of simple process, short preparation cycle, convenient operation, mild reaction conditions, and low cost. It is suitable for large-scale preparation and is beneficial to industrial applications.

Description

technical field [0001] The invention belongs to the field of preparation of porous crystal materials, and relates to an iron-based metal-organic framework porous composite material modified by a coordination modulator, and a preparation method and application thereof. Background technique [0002] Metal-organic frameworks (MOFs) are a new class of nanoporous materials with periodic multi-dimensional network structures formed by the self-assembly of inorganic metal ions or metal clusters and organic ligands. As a member of iron-based metal organic frameworks, MIL-53(Fe) can be prepared by self-assembly of ferric chloride hexahydrate and terephthalic acid ligands, in which the Fe-O atomic chain and terephthalic acid organic ligands intersect each other. link. Because MIL-53(Fe) has good crystallinity, stable chemical properties, good adsorption and visible light responsiveness, it has a wide range of applications in the removal of organic pollutants. Gao et al. deeply studie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J27/08B01J37/34C02F1/30C02F101/34C02F101/38C02F103/34
CPCB01J31/1691B01J31/2226B01J27/08B01J37/346C02F1/30B01J2531/842B01J2531/0213C02F2101/34C02F2101/38C02F2101/40C02F2305/10C02F2103/343B01J35/39B01J35/23Y02W10/37
Inventor 姜丹妮朱健黄超王平方笛
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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