Composite photocatalyst for efficiently degrading ciprofloxacin as well as preparation method and application of composite photocatalyst

A technology of ciprofloxacin and composite light, applied in the field of photocatalysis, can solve the problems of poor photocatalytic activity, inability to improve the conduction band position of bismuth oxybromide, and low light absorption efficiency

Active Publication Date: 2020-05-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these traditional modification methods usually cannot improve the conduction band position of bismuth oxybromide, because the photogenerated electrons of the bismuth oxybromide photocatalyst cannot convert oxygen (O 2 ) into superoxide radicals (O 2 - ), thus severely limiting the photocatalytic performance of the modified bismuth oxybromide photocatalyst
Therefore, how to comprehensively improve the problems of bismuth oxybromide photogenerated electron-hole pair recombination rate, low light absorption efficiency, low conduction band position, poor photocatalytic activity, and poor stability of photocatalytic performance are technical problems that need to be solved urgently in this field.

Method used

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  • Composite photocatalyst for efficiently degrading ciprofloxacin as well as preparation method and application of composite photocatalyst
  • Composite photocatalyst for efficiently degrading ciprofloxacin as well as preparation method and application of composite photocatalyst
  • Composite photocatalyst for efficiently degrading ciprofloxacin as well as preparation method and application of composite photocatalyst

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Experimental program
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Embodiment 1

[0068] The invention discloses an indium vanadate-modified bismuth oxybromide composite photocatalyst. The indium vanadate-modified bismuth oxybromide composite photocatalyst uses bismuth oxybromide as a carrier, and the bismuth oxybromide is decorated with indium vanadate.

[0069] In this embodiment, the mass fraction of indium vanadate in the indium vanadate-modified bismuth oxybromide composite photocatalyst is 10%.

[0070] In this embodiment, the indium vanadate-modified bismuth oxybromide composite photocatalyst is a spherical material with a diameter of 2 μm to 4 μm.

[0071] In this embodiment, the bismuth oxybromide is composed of bismuth oxybromide nanosheets and has a spherical structure.

[0072] In this embodiment, the diameter of the indium vanadate is 200nm-500nm.

[0073] The preparation method of the indium vanadate modified bismuth oxybromide composite photocatalyst of the above-mentioned present embodiment comprises the following steps:

[0074] (1) Prepa...

Embodiment 2

[0099] An indium vanadate modified bismuth oxybromide composite photocatalyst uses bismuth oxybromide as a carrier, and the bismuth oxybromide is decorated with indium vanadate.

[0100] In this embodiment, the mass fraction of indium vanadate in the indium vanadate-modified bismuth oxybromide composite photocatalyst is 20%.

[0101] In this embodiment, the indium vanadate-modified bismuth oxybromide composite photocatalyst is a spherical material with a diameter of 2 μm to 4 μm.

[0102] In this embodiment, the bismuth oxybromide is composed of bismuth oxybromide nanosheets and has a spherical structure.

[0103] In this embodiment, the diameter of the indium vanadate is 200nm-500nm.

[0104] The preparation method of the indium vanadate modified bismuth oxybromide composite photocatalyst of the above-mentioned present embodiment comprises the following steps:

[0105] (1) Preparation of indium vanadate

[0106] (1.1) Mix 1 mmol of indium nitrate, 200 mg of polyvinylpyrrol...

Embodiment 3

[0117] An indium vanadate modified bismuth oxybromide composite photocatalyst uses bismuth oxybromide as a carrier, and the bismuth oxybromide is decorated with indium vanadate.

[0118] In this embodiment, the mass fraction of indium vanadate in the indium vanadate-modified bismuth oxybromide composite photocatalyst is 30%.

[0119] In this embodiment, the indium vanadate-modified bismuth oxybromide composite photocatalyst is a spherical material with a diameter of 2 μm to 4 μm.

[0120] In this embodiment, the bismuth oxybromide is composed of bismuth oxybromide nanosheets and has a spherical structure.

[0121] In this embodiment, the diameter of the indium vanadate is 200nm-500nm.

[0122] The preparation method of the indium vanadate modified bismuth oxybromide composite photocatalyst of the above-mentioned present embodiment comprises the following steps:

[0123] (1) Preparation of indium vanadate

[0124] (1.1) Mix 1 mmol of indium nitrate, 200 mg of polyvinylpyrrol...

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Abstract

The invention discloses a composite photocatalyst for efficiently degrading ciprofloxacin as well as a preparation method and application of the composite photocatalyst, and belongs to the technical field of photocatalysis. The composite photocatalyst is an indium vanadate modified bismuth oxybromide composite photocatalyst, bismuth oxybromide is used as a carrier, and indium vanadate is modifiedon bismuth oxybromide. The composite photocatalyst has the advantages of being environmentally friendly, high in photo-induced electron-hole separation efficiency, high in light absorption efficiency,high in photocatalytic oxidation reduction capacity, good in photocatalytic performance stability, good in reusability and the like, and the preparation method of the composite photocatalyst has theadvantages that the preparation process is simple, operation conditions are easy to control, raw materials are simple and easy to obtain, and the preparation cost is low. The composite photocatalyst disclosed by the invention can be used for degrading antibiotic wastewater, has the advantages of simple application method, high degradation efficiency and good reusability, and has a very good practical application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a composite photocatalyst for efficiently degrading ciprofloxacin, a preparation method and application thereof. Background technique [0002] With the development of modern industry, the problems of energy crisis and environmental pollution are becoming more and more serious. Among them, energy shortage and environmental degradation are major problems that human beings face in the 21st century and need to be solved urgently. Therefore, new energy utilization and environmental pollution control are of great significance to the national sustainable development strategy. Semiconductor heterogeneous photocatalytic technology is considered to be a promising technology for deep purification of environmental pollution because it can completely catalyze and degrade various organic and inorganic substances in polluted air and wastewater, in terms of energy storage, conversion and en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J35/02B01J35/08C02F1/30C02F101/38
CPCB01J35/004B01J27/06B01J35/023B01J35/08C02F1/30C02F2305/10C02F2101/38C02F2305/023Y02W10/37
Inventor 袁兴中熊婷蒋龙波于瀚博张进陈浩云
Owner HUNAN UNIV
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