Application of phosphorus-doped titanium dioxide nanotube array catalyst in photoelectrocatalytic degradation of tylosin

A technology of nanotube arrays and titanium dioxide, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor photocatalytic efficiency, achieve good photocurrent density, simple synthesis process, Good effect of recycling performance

Active Publication Date: 2021-01-26
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the large bandgap (3.2eV) and high photoinduced charge ca

Method used

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  • Application of phosphorus-doped titanium dioxide nanotube array catalyst in photoelectrocatalytic degradation of tylosin
  • Application of phosphorus-doped titanium dioxide nanotube array catalyst in photoelectrocatalytic degradation of tylosin
  • Application of phosphorus-doped titanium dioxide nanotube array catalyst in photoelectrocatalytic degradation of tylosin

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023]Example 1

[0024](1), using 50ml 18wt.% NH4F, 12ml 30% H2O2And 3ml 18wt.% urea and add 12ml concentrated HNO3Polishing liquid for polishing 2*5cm titanium sheet.

[0025](2). The polished titanium sheet in step (1) is used as the anode and the platinum foil is used as the cathode. The two-electrode system is used for the first anodic oxidation. The electrolyte is composed of 0.4wt.% NH4F, composed of 2% volume fraction of deionized water and 98% volume fraction of ethylene glycol, oxidation voltage 40V, oxidation time 1 hour.

[0026](3) Put the titanium sheet in step (2) in 30% H2O2Ultrasound for 13 minutes until a bright surface appears.

[0027](4) The titanium sheet in step (3) is subjected to the second step of anodizing with an oxidation voltage of 50V and an oxidation time of 1.5 hours.

[0028](5) The titanium sheet prepared in step (4) is washed with deionized water and dried in air, and then annealed in a tube furnace at 450° C. for 3 hours.

[0029](6) Put the titanium sheet anneale...

Example Embodiment

[0032]Example 2

[0033](1), using 50ml 18wt.% NH4F, 12ml 30% H2O2And 3ml 18wt.% urea and add 12ml concentrated HNO3Polishing liquid for polishing 2*5cm titanium sheet.

[0034](2). Use the polished titanium sheet in step (1) as the anode and platinum foil as the cathode, and use a two-electrode system to perform the first step anodizing. The electrolyte is composed of 0.4wt.% NH4F, composed of 2% volume fraction of deionized water and 98% volume fraction of ethylene glycol, oxidation voltage 40V, oxidation time 1 hour.

[0035](3) Put the titanium sheet in step (2) in 30% H2O2Ultrasound for 13 minutes until a bright surface appears.

[0036](4) The titanium sheet in step (3) is subjected to the second step of anodizing, the oxidation voltage is 50V, and the oxidation time is 1.5 hours.

[0037](5) The titanium sheet prepared in step (4) is washed with deionized water and dried in air, and then annealed in a tube furnace at 450° C. for 3 hours.

[0038](6) Put the titanium sheet annealed in step (5) ...

Example Embodiment

[0041]Example 3

[0042](1), using 50ml 18wt.% NH4F, 12ml 30% H2O2And 3ml 18wt.% urea and add 12ml concentrated HNO3Polishing liquid for polishing 2*5cm titanium sheet.

[0043](2). The polished titanium sheet in step (1) is used as the anode and the platinum foil is used as the cathode. The two-electrode system is used for the first step anodization. The electrolyte is composed of 0.4wt.% NH4F, composed of 2% volume fraction of deionized water and 98% volume fraction of ethylene glycol, oxidation voltage 40V, oxidation time 1 hour.

[0044](3) Put the titanium sheet in step (2) in 30% H2O2Ultrasound for 13 minutes until a bright surface appears.

[0045](4) The titanium sheet in step (3) is subjected to the second step of anodizing with an oxidation voltage of 50V and an oxidation time of 1.5 hours.

[0046](5) The titanium sheet prepared in step (4) is washed with deionized water and dried in air, and then annealed in a tube furnace at 450° C. for 3 hours.

[0047](6) Put the titanium sheet anneale...

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Abstract

The invention discloses an application of a phosphorus-doped titanium dioxide nanotube array catalyst in photoelectrocatalytic degradation of tylosin, and belongs to the field of photoelectrocatalysis. According to the titanium dioxide nanotube array catalyst, a titanium sheet, red phosphorus and ethylene glycol are adopted as raw materials, a titanium dioxide nanotube array is prepared through ananodic oxidation method, then an ampoule bottle is sealed, and the titanium dioxide nanotube array is calcined with amorphous red phosphorus to prepare the phosphorus-doped titanium dioxide nanotubearray. According to the invention, the catalyst has excellent performance of photoelectrocatalytic degradation of tylosin (80% of tylosin can be removed after four hours of illumination) and good cycling stability (78% of tylosin can still be removed after four cycling tests); at present, a plurality of methods are used for removing tylosin, such as physical adsorption, biodegradation, chemical oxidation, photocatalysis technology and the like, but the methods have the defects of high energy consumption, poor tylosin removal effect under low pollutant concentration and the like to different extents, so that the photoelectrocatalysis technology with the help of the phosphorus-doped titanium dioxide nanotube array catalyst has certain significance; and the titanium sheet and the red phosphorus are rich in reserves in nature, non-toxic, low in price and environment-friendly, and are environment-friendly catalysts with very good prospects.

Description

technical field [0001] The invention belongs to the field of photoelectric catalysis, and in particular relates to the application of a phosphorus-doped titanium dioxide nanotube array catalyst in the photoelectric catalytic degradation of tylosin. Background technique [0002] The photoelectrocatalytic method is an efficient green technology, which can control the reaction rate and does not require the addition of chemical additives. Most importantly, it can achieve continuous degradation of pollutants at lower pollutant concentrations. The research on high-efficiency photocatalysts has also become a hot spot in recent years. As a semiconductor photocatalyst, titanium dioxide has been widely used in photocatalysis due to its advantages of non-toxicity, low price and sustainable use. However, the large band gap (3.2 eV) and high photoinduced charge carrier recombination rate make it poor in photocatalytic efficiency. [0003] The titanium dioxide nanotube array grown on th...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/48B01J27/18B01J27/14A62D3/17A62D3/11C02F101/38A62D101/26
CPCC02F1/30C02F1/48B01J35/004B01J35/0033B01J27/18B01J27/14A62D3/17A62D3/11C02F2305/10C02F2101/38A62D2101/26Y02W10/37
Inventor 佘希林杨东江邹译慧张高联朱玉坤
Owner QINGDAO UNIV
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