Silver phosphate/metal organic framework composite material, as well as preparation method and application thereof

A metal-organic framework and composite material technology, which is applied in the field of silver phosphate/metal-organic framework composite material and its preparation, can solve the problems of reducing photocatalytic performance, preventing visible light absorption, reducing structural stability, etc., so as to improve the photocatalytic performance, The effect of enhancing charge transfer ability and improving structural stability

Inactive Publication Date: 2018-06-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a semiconductor material, silver phosphate has the following problems in practical application: (1) silver phosphate is slightly soluble in water, which greatly reduces its structural stability in the photocatalytic process, and there is a problem that it is easy to agglomerate; (2) In the absence of sacrificial reagents, silver phosphate has the problem of poor photostability, which is prone to photocorrosion, and the black silver element produced by silver phosphate photocorrosion will adhere to the surface of silver phosphate particles, thereby preventing the absorption of visible light. Reduced photocatalytic performance

Method used

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  • Silver phosphate/metal organic framework composite material, as well as preparation method and application thereof
  • Silver phosphate/metal organic framework composite material, as well as preparation method and application thereof
  • Silver phosphate/metal organic framework composite material, as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A silver phosphate / metal organic framework composite material comprising silver phosphate and MIL-53(Fe), wherein the silver phosphate is doped in the MIL-53(Fe).

[0039] In this example, the molar ratio of silver phosphate to MIL-53(Fe) is 1:3.

[0040] The preparation method of the silver phosphate / metal-organic framework composite material of the above-mentioned present embodiment comprises the following steps:

[0041] (1) Preparation of MIL-53(Fe)

[0042] (1.1) Disperse 2.494 mmol of ferric chloride hexahydrate and 2.494 mmol of terephthalic acid in 56 ml of dimethylformamide, stir at 25°C and 400 r / min for 2 h, then pour the resulting mixed solution into Put it into a polytetrafluoroethylene lining, put the reaction kettle containing the polytetrafluoroethylene lining into an oven, and perform a solvothermal reaction at 150° C. for 12 hours.

[0043] (1.2) Centrifuge the reaction product obtained after the solvothermal reaction in step (1.1) at a rotational sp...

Embodiment 2

[0052] A silver phosphate / metal organic framework composite material, which is basically the same as the silver phosphate / metal organic framework composite material in Example 1, except that the molar ratio of silver phosphate and MIL-53 (Fe) in Example 2 is 1:1.

[0053] The preparation method of the silver phosphate / metal-organic framework composite material in this example above is basically the same as that in Example 1, except that the amount of MIL-53 (Fe) used in the step (2.1) of Example 2 is 0.3 mmol.

[0054] The silver phosphate / metal-organic framework composite (Ag 3 PO 4 / MIL-53(Fe)), designated as APM-1.

Embodiment 3

[0056] A silver phosphate / metal organic framework composite material, which is basically the same as the silver phosphate / metal organic framework composite material in Example 1, except that the molar ratio of silver phosphate to MIL-53 (Fe) in Example 3 is 1:5.

[0057] The preparation method of the above-mentioned silver phosphate / metal organic framework composite material in this example is basically the same as that in Example 1, the difference is: the amount of MIL-53 (Fe) in the step (2.1) of Example 3 1.5 mmol.

[0058] The silver phosphate / metal-organic framework composite (Ag 3 PO 4 / MIL-53(Fe)), labeled APM-5.

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Abstract

The invention discloses a silver phosphate / metal organic framework composite material, as well as a preparation method and application thereof. The silver phosphate / metal organic framework composite material is prepared from silver phosphate and MIL-53 (Fe), wherein the silver phosphate is doped in the MIL-53(Fe). The preparation method comprises the following steps: dispersing the MIL-53(Fe) in aqueous solution, and carrying out ultrasonic treatment, thus obtaining dispersed liquid containing the MIL-53(Fe); adding Ag<+> and PO4<3-> into the dispersed liquid containing the MIL-53(Fe) in sequence, and stirring to obtain the silver phosphate / metal organic framework composite material. The silver phosphate / metal organic framework composite material disclosed by the invention has the advantages of large specific surface area, good dispersity, good stability, good photocatalytic property and the like; the preparation method disclosed by the invention has the advantages of simple operation,fewer raw-material varieties, low cost and the like, and is suitable for large-scale preparation. The silver phosphate / metal organic framework composite material can be used for treating antibiotic waste water, and can realize high-efficiency removal of antibiotics, so as to have better application prospect.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a metal-organic framework composite material, in particular to a silver phosphate / metal-organic framework composite material and a preparation method and application thereof. Background technique [0002] Metal-organic frameworks (MOFs) are self-assembled through inorganic metal center ions or metal clusters and organic ligands through chemical bonds, forming a porous structure with high porosity, large specific surface area, adjustable pore size and shape, and easy functionalization. Functional materials are widely used in sensing, gas storage and separation, photocatalysis, etc. MOFs materials can absorb light when irradiated with light, exhibiting semiconductor properties, making them a potential photocatalyst. Among them, MIL-53(Fe), as an iron-based metal-organic framework material, has the advantages of low-cost raw materials, green and non-toxic, and has been applied in p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C02F1/28C02F1/30C02F101/30
CPCC02F1/285C02F1/30C02F2101/30C02F2305/10C08G83/008
Inventor 熊炜平曾茁桐肖嵘曾光明杨朝晖谢靓程赖萃李鑫程敏胡亮周成赟徐锐张燕茹汤湘
Owner HUNAN UNIV
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