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Method for preparing cuprous oxide composite titanium dioxide nanotube array

A technology of nanotube array and cuprous oxide, which is applied in the field of nanotubes, can solve the problem that the visible light catalytic performance of photocatalysts has not been significantly improved, and achieve the effect of effective degradation

Inactive Publication Date: 2011-01-26
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the visible-light photocatalytic performance of the photocatalyst prepared by this method is lower than that of pure TiO 2 not significantly improved

Method used

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  • Method for preparing cuprous oxide composite titanium dioxide nanotube array
  • Method for preparing cuprous oxide composite titanium dioxide nanotube array
  • Method for preparing cuprous oxide composite titanium dioxide nanotube array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) The base material is a pure titanium plate with a thickness of 2 mm. The surface is polished with metallographic sandpaper until there are no scratches, cleaned with acetone, ethanol and three times of ultrasonic water, and dried in air for use. Prepare an electrolyte solution of 0.1wt% HF, use platinum as the counter electrode at room temperature, perform electrochemical anodic oxidation at 20V for 1h, and calcinate at 400°C for 0.5h to obtain ordered Ti0 on the surface of the titanium plate 2 The nanotube array film layer has an inner diameter of 80-90nm and a film thickness of about 500nm.

[0021] (2) Using an ultrasonic method, a cuprous oxide-composite TiO2 nanotube array is prepared. 0.025mol CuAc 2 Dissolve in 30ml of ethanol, then add 0.06mmol of PVP to it, after the solution is uniformly dispersed, put the film layer obtained in step 1, put all the solution in a 100°C water bath, then add 0.38mol of glucose and 0.60mol of NaOH , after ultrasonication for...

Embodiment 2

[0024] (1) TiO 2 The preparation of the nanotube array film layer is the same as in Example 1.

[0025] (2) Using ultrasonic method to prepare composite cuprous oxide nanoparticles modified TiO 2 Nanotube Array Photocatalysts. 0.005mol CuAc 2 Dissolve in 40ml of ethanol, then add 0.02mol of PVP to it, after the solution is uniformly dispersed, put the film layer obtained in step 1, put all the solution in a 100°C water bath, then add 0.26mol of glucose and 0.40mol of NaOH , after ultrasonication for 60 min, the sample was taken out and vacuum-dried at 100° C. for 2 h to prepare a cuprous oxide composite TiO2 nanotube array photocatalyst.

[0026] (3) TiO compounded with cuprous oxide 2 The test of the apparent rate constant k of the nanotube array photocatalyst for the visible light catalytic degradation of rhodamine B is the same as in Example 1, and the results are shown in Table 1.

Embodiment 3

[0028] (1) TiO 2 The preparation of the nanotube array film layer is the same as in Example 1.

[0029] (2) Using ultrasonic method to prepare composite cuprous oxide nanoparticles modified TiO 2 Nanotube Array Photocatalysts. 0.05mol CuAc 2 Dissolve in 50ml of ethanol, then add 0.04mmol of PVP to it, after the solution is uniformly dispersed, put the film layer obtained in step 1, put all the solution in a 100°C water bath, then add 0.32mol of glucose and 0.18mol of NaOH , after ultrasonication for 30min, the sample was taken out and vacuum-dried at 120°C for 2h to obtain the TiO composite cuprous oxide nanoparticles. 2 Nanotube Array Photocatalysts.

[0030] (3) TiO compounded with cuprous oxide 2 The test of the apparent rate constant k of the nanotube array photocatalyst for the visible light catalytic degradation of rhodamine B is the same as in Example 1, and the results are shown in Table 1.

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Abstract

The invention discloses a method for preparing a cuprous oxide composite titanium dioxide nanotube array, which relates to a nanotube. The method comprises the following steps of: cleaning and pre-processing the surface of a substrate material; preparing 0.1 to 1.5 weight percent of aqueous solution of hydrogen fluoride into an electrolyte, performing electrochemical anode oxidization on the substrate material, namely forming a layer of ordered TiO2 nanotube array film with controllable size on the surface of the substrate material, and performing thermal treatment on the film; preparing ethanol solution with copper salt concentration of 0.014 to 4mol / L, adding 0.001 to 0.06mmol of polyvinylpyrrolidone into the ethanol solution, after the solution is uniformly dispersed, putting the obtained film into the solution, putting the film in a water bath, adding 0.01 to 0.80mol of glucose and 0.10 to 0.95mol of NaOH, and performing ultrasonic treatment and then taking the film out; and performing thermal treatment on the obtained composite film in vacuum at the temperature of between 50 and 200 DEG C for 1 to 5 hours to obtain the cuprous oxide composite TiO2 nanotube array.

Description

technical field [0001] The invention relates to a nanotube, in particular to a method for preparing a visible light-responsive cuprous oxide composite titanium dioxide nanotube array. Background technique [0002] Titanium dioxide (TiO 2 ), as a new type of nanomaterial, has shown attractive application prospects in the fields of energy, materials, and the environment because of its excellent chemical stability, photoelectric properties, and corrosion resistance. In recent years, the use of TiO 2 The photocatalytic properties of semiconductor catalysts to catalyze the degradation of pollutants has become an emerging environmental treatment technology. TiO 2 Nanocrystals have the form of powder, film and nanotube. Among them, nano-powder has a high specific surface area, but it is difficult to recycle; nano-film is easy to recycle on the carrier, but reduces the contact area with the substance. In comparison, TiO 2 nanotube array film than TiO 2 The nanoparticle film h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C30B29/16C30B29/62C30B30/02
Inventor 孙岚王梦晔谢鲲鹏吴奇林昌健
Owner XIAMEN UNIV
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