Composite photocatalyst for degrading tetracycline and preparation method and application thereof

A photocatalytic reaction and catalyst technology, applied in the field of photocatalysis, can solve the problems of cumbersome preparation process and unstable materials, and achieve the effects of simple synthesis process, reduced mass removal and easy operation

Inactive Publication Date: 2020-01-03
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, such as cumbersome material preparation process, unstable material, etc., to provide a photocatalyst with large specific surface area, many reaction sites, high photogenerated electron-hole utilization rate, and photocatalytic activity. Silver io

Method used

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  • Composite photocatalyst for degrading tetracycline and preparation method and application thereof
  • Composite photocatalyst for degrading tetracycline and preparation method and application thereof
  • Composite photocatalyst for degrading tetracycline and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A silver iodide-modified metal-organic framework UiO-66(NH 2 ) composite photocatalyst with metal-organic framework UiO-66(NH 2 ) as the carrier, metal organic framework UiO-66(NH 2 ) is modified with silver iodide.

[0062]In the present embodiment, the mass percentage of silver iodide in the silver iodide modified metal organic framework UiO-66 (NH2) composite photocatalyst is 10%-50%, and the mass percentage of metal organic framework UiO-66 (NH2) is 50% %-90%, by adjusting the mass ratio of silver iodide and metal organic framework UiO-66 (NH2), in order to achieve the effect of the highest photocatalytic degradation efficiency of tetracycline, the present invention has been confirmed by many tests, and the numerical range of the above-mentioned mass percentage content is limited The composite photocatalyst can get the best tetracycline degradation effect.

[0063] In this example, the silver iodide is microsphere; the metal organic framework UiO-66(NH 2 ) is a ...

Embodiment 2

[0076] A silver iodide-modified metal-organic framework UiO-66(NH 2 ) composite photocatalyst, and silver iodide modified metal organic framework UiO-66(NH 2 ) composite photocatalysts are basically the same, the only difference is that the silver iodide modified metal-organic framework UiO-66(NH 2 ) The mass percentage of silver iodide in the composite photocatalyst is 30%, metal organic framework UiO-66 (NH 2 ) is 70% by mass.

[0077] A silver iodide modified metal organic framework UiO-66(NH 2 ) The preparation method of the composite photocatalyst is basically the same as the preparation method in Example 1, except that the quality of potassium iodide added in Example 2 is 48.9 mg, and the volume of the silver nitrate aqueous solution is 1.475 mL.

[0078] The silver iodide modified metal-organic framework UiO-66(NH 2 ) composite photocatalyst named AUN-2.

[0079] figure 1 Silver iodide modified metal-organic framework UiO-66(NH 2 ) composite photocatalyst (AUN-2)...

Embodiment 3

[0084] A silver iodide-modified metal-organic framework UiO-66(NH 2 ) composite photocatalyst, and silver iodide modified metal organic framework UiO-66(NH 2 ) composite photocatalysts are basically the same, the only difference is that the silver iodide modified metal organic framework UiO-66(NH 2 ) The mass percentage of silver iodide in the composite photocatalyst is 50%, metal organic framework UiO-66 (NH 2 ) is 50% by mass.

[0085] A silver iodide modified metal organic framework UiO-66(NH 2 ) The preparation method of the composite photocatalyst is basically the same as the preparation method in Example 1, except that the quality of potassium iodide added in Example 3 is 114.5 mg, and the volume of the silver nitrate aqueous solution is 3.45 mL.

[0086] The silver iodide modified metal organic framework UiO-66(NH 2 ) composite photocatalyst named AUN-3.

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Abstract

The invention discloses a composite photocatalyst for degrading tetracycline and a preparation method and application thereof, and relates to the field of photocatalysis. The composite photocatalyst takes a metal organic framework UiO-66 (NH2) as a carrier, and the metal organic framework UiO-66 (NH2) is modified with granular silver iodide; the composite photocatalyst is a binary composite material AgI/UiO-66(NH2) with a Z-type heterojunction structure. The preparation method thereof comprises the following steps of mixing the metal organic framework UiO-66 (NHS) with a silver iodide precursor, and performing chemical precipitation on the obtained mixture to obtain silver iodide modified metal organic framework UiO-66 (NHS) binary composite photocatalyst. The silver iodide modified metalorganic framework UiO-66 (NH2) binary composite photocatalyst has the advantages of being environment-friendly, large in specific surface area, high in photoproduction electron-hole separation efficiency, high in photocatalytic activity, good in stability, light in corrosion resistance and the like, and the preparation method has the advantages of being simple, low in raw material cost, less in energy consumption, short in time consumption, easy to control conditions and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a composite photocatalyst for degrading tetracycline, a preparation method and application thereof. Background technique [0002] Antibiotic pollution has become an important problem faced by human beings. As a green purification technology, photocatalytic technology has made great progress in its research in recent years. As a new technology for pollution treatment, photocatalytic technology has the advantages of high efficiency and energy saving, less secondary pollution, clean and non-toxic, and simplified process compared with other methods, which makes photocatalytic technology have broad application prospects in wastewater purification and treatment. [0003] metal organic framework UiO-66(NH 2 ), as a typical metal-organic framework material, has the characteristics of large specific surface area, thermal stability, chemical stability, etc., and exhibit...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J35/10C02F1/30C02F101/38
CPCB01J31/26B01J35/004B01J35/1004C02F1/30C02F2101/38C02F2305/10
Inventor 袁兴中潘阳蒋龙波王侯于瀚博张进
Owner HUNAN UNIV
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