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Anodic oxidation preparation method for titanium dioxide nanotube array photocatalyst for degrading rhodamine B

A technology of nanotube array and anodic oxidation method, which is applied in the field of preparation of nano-photocatalytic environmental protection materials, can solve problems such as needs, cumbersome recycling and complicated processes, and achieve the effects of easy recycling and good catalytic stability

Inactive Publication Date: 2016-09-21
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanotubes prepared by the template-assisted method and the hydrothermal synthesis method are powders in a dispersed state, which are not firmly attached to the substrate, which makes recycling more cumbersome and requires complex processes

Method used

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  • Anodic oxidation preparation method for titanium dioxide nanotube array photocatalyst for degrading rhodamine B
  • Anodic oxidation preparation method for titanium dioxide nanotube array photocatalyst for degrading rhodamine B
  • Anodic oxidation preparation method for titanium dioxide nanotube array photocatalyst for degrading rhodamine B

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Experimental program
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Effect test

Embodiment 1

[0028] 1. First, place the titanium sheet in an acid mixed solution for pickling for 5 minutes, then ultrasonically clean the titanium sheet in an organic solution and deionized water for 10 minutes, and finally dry the cleaned titanium sheet at room temperature for use.

[0029] 2. Configure 0.27M NH 4 F, a mixed solution of water and glycerol (1:1, v / v) was stirred evenly as the electrolyte for the anodic oxidation process.

[0030] 3. The anode and cathode are pretreated titanium sheets and platinum wires for electrochemical anodic oxidation respectively. The distance between the two electrodes is 1-4cm, and the voltage is boosted from 0V to 20V at a boost rate of 150-300mV / s and then stopped and maintained. 1~3h.

[0031] 4. After the anodic oxidation reaction, turn off the power, take out the titanium sheet of the anode and rinse it with deionized water to remove the electrolyte adsorbed on the surface, and then dry it at room temperature.

[0032] 5. Put the titanium d...

Embodiment 2

[0035] 1. First, place the titanium sheet in an acid mixed solution for pickling for 5 minutes, then ultrasonically clean the titanium sheet in an organic solution and deionized water for 10 minutes, and finally dry the cleaned titanium sheet at room temperature for use.

[0036] 2. Configure 0.27M NH 4 F, a mixed solution of water and glycerol (1:1, v / v) was stirred evenly as the electrolyte for the anodic oxidation process.

[0037] 3. The anode and cathode are pretreated titanium sheets and platinum wires for electrochemical anodic oxidation respectively. The distance between the two electrodes is 1-4cm, and the voltage is boosted from 0V to 20V at a boost rate of 150-300mV / s and then stopped and maintained. 1~3h.

[0038] 4. After the anodic oxidation reaction, turn off the power, take out the titanium sheet of the anode and rinse it with deionized water to remove the electrolyte adsorbed on the surface, and then dry it at room temperature.

[0039] 5. Put the titanium d...

Embodiment 3

[0042] 1. First, place the titanium sheet in an acid mixed solution for pickling for 5 minutes, then ultrasonically clean the titanium sheet in an organic solution and deionized water for 10 minutes, and finally dry the cleaned titanium sheet at room temperature for use.

[0043] 2. Configure 0.1M NH 4 F, water and 0.5M (NH 4 ) 2 SO 4 The mixed solution was stirred evenly as the electrolyte solution for the anodizing process.

[0044] 3. The anode and the cathode are pretreated titanium sheets and platinum wires for electrochemical anodization, the distance between the two electrodes is 2em, and the voltage is boosted from 0V to 20V at a boost rate of 150-300mV / s and then stopped and maintained at 1~ 3h.

[0045] 4. After the anodic oxidation reaction, turn off the power, take out the titanium sheet of the anode and rinse it with deionized water to remove the electrolyte adsorbed on the surface, and then dry it at room temperature.

[0046] 5. Put the titanium dioxide nanot...

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Abstract

The invention discloses an anodic oxidation preparation method for titanium dioxide nanotube array photocatalyst for degrading rhodamine B. The method comprises the following steps that a titanium sheet is cleaned and used as an electrochemical anodizing substrate material; different systems of electrolytes are prepared; a titanium dioxide nanotube array is prepared through a certain duration of electrochemical anodizing oxidation under a certain voltage; the titanium dioxide nanotube array with the corresponding crystal form is obtained through thermal treatment; and the obtained titanium dioxide nanotube array is used for degrading an organic dyestuff rhodamine B solution under ultraviolet light and visible light. The rhodamine B solution is basically and completely degraded within 3 hours through the titanium dioxide nanotube array under the irradiation of ultraviolet light, and the degradation effect is still good after repeat for 3-5 times. Meanwhile, the catalyst has a certain degradation effect under the visible light. The catalyst preparation method is simple, and the catalyst is convenient to recycle, has good degradation effect on the rhodamine B and is good in stability and repeatability.

Description

technical field [0001] The invention provides an anodic oxidation preparation method of a titanium dioxide nanotube array photocatalyst that degrades rhodamine B, and belongs to the field of nano photocatalytic environmental protection material preparation. Background technique [0002] The development of modern industry has increased the amount of industrial wastewater containing refractory pollutants. The discharge of industrial wastewater is large, and the discharge compliance rate and reuse rate are low. Water is the source of life, and water pollution treatment has become a hot issue in society. People use a variety of methods to treat wastewater, such as adsorption, ion exchange, biological treatment and advanced chemical oxidation. Photocatalysis is one of the advanced chemical oxidation methods. It mainly uses the photocatalytic properties of semiconductors. Its degradation speed is fast, it does not produce secondary pollution, and the reaction conditions are mild....

Claims

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Application Information

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IPC IPC(8): C25D11/26C02F1/32B01J21/06B82Y40/00
CPCC25D11/26B82Y40/00C02F1/32B01J21/063C02F2305/10C02F2101/308B01J35/39
Inventor 李迎娇周丹彤陈智杨倩
Owner CHINA JILIANG UNIV
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