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Preparation method and application of highly ordered ternary titanium-aluminum-tin alloy oxide nano-tube array

A nanotube array and highly ordered technology, applied in the field of material chemistry, can solve the problems of composite photocatalysts that cannot effectively exert their activity, reduce high specific surface area, waste of visible light, etc., achieve strong photocatalytic efficiency and photocatalytic activity, and improve adsorption capacity and photocatalytic efficiency, the effect of increasing the range of use

Inactive Publication Date: 2012-03-07
TONGJI UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

But in practical application TiO 2 Nanotube arrays are also limited due to the following two disadvantages
First, the photogenerated electrons and holes have a high recombination probability, resulting in low photon quantum efficiency
Second, its band gap is only 3.2eV, and only ultraviolet light with a wavelength of less than 387nm can stimulate its catalytic activity, and the visible light that accounts for the vast majority of solar energy is wasted
However, conventional stuffing doping reduces the TiO 2 The inherent high specific surface area of ​​nanotubes prevents the activity of composite photocatalysts from being effectively exerted

Method used

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  • Preparation method and application of highly ordered ternary titanium-aluminum-tin alloy oxide nano-tube array

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Embodiment 1

[0024] The preparation process and characterization of titanium-aluminum-tin alloy oxide nanotube array photoanode, the specific steps are as follows:

[0025] Ti-5Al-2.5Sn (gifted by Xi’an Titanium Alloy Research Institute) was cut into 15×50×1 mm samples with a wire cutting machine. After the alloy sheet was polished with 100# and 500# sandpaper in turn, it was polished into a mirror surface with metallographic sandpaper, and then ultrasonically cleaned in distilled water and acetone for 15 minutes each. At room temperature, the pre-treated titanium alloy sheet was used as the anode, and the platinum sheet electrode was used as the counter electrode. / L ammonium fluoride ethylene glycol solution as electrolyte, constant potential +30V anodization for 3 hours, after anodization, take out the sample and clean it with double distilled water, dry it in nitrogen, and then place it in a tube furnace oxygen atmosphere Heat treatment, the temperature was raised from room temperatur...

Embodiment 2

[0030] Using titanium-aluminum-tin alloy oxide nanotube arrays to simulate solar photocatalytic degradation of organic dye wastewater methylene blue, the specific steps are as follows:

[0031] The degradation experiment of methylene blue was carried out in a 100mL single-cell circular quartz glass container, plus a set of cups with circulating water. Using a three-electrode degradation system, TiO 2 The array of NTs and alloy oxide nanotubes is used as the anode, the titanium plate (15×50×1 mm) is used as the cathode, the distance between the two electrodes is 1 cm, and the effective photoanode area is 3 cm 2 . With 0.1 mol / L Na 2 SO 4 Prepare methylene blue to a concentration of 40 mg / L in deionized water - The simulated wastewater was treated with a volume of 60 mL. Using simulated sunlight as the light source, the light intensity is 100 mW / cm 2 . Apply a bias voltage of +0.5 V (relative to the saturated calomel electrode) with a DC stabilized power supply (Shanghai...

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Abstract

The invention relates to a preparation method and an application of a titanium-aluminum-tin alloy oxide nano-tube array. The product can be used in simulated sunlight photoelectrocatalytic oxidative degradation of dye wastewater. An electrochemical anode oxidation method is adopted, and a layer of highly ordered ternary oxide nano-tube array photoanode is vertically grown in-situ on a titanium-aluminum-tin alloy substrate. Compared to a traditional composite oxide photoelectrocatalyst, the titanium-aluminum-tin alloy oxide nano-tube array photoanode provided by the invention has ordered structure and photocatalytic stability of TiO2 nano-tubes, and the separation efficiency of photogenerated electrons and cavities is improved, such that the nano-tube array has better photocatalytic efficiency and activity, and the nano-tube array can be used for simulating sunlight photoelectrocatalytic oxidative degradation of dye wastewater. The preparation method of the electrode is simple. With the nano-tube array, photoelectrocatalytic oxidative degradation of wastewater can be carried out by using simulated sunlight, and processing cost of photoelectrocatalytic oxidative degradation of wastewater can be reduced. Therefore, the nano-tube array and the method bring wide economic and social benefits.

Description

technical field [0001] The invention relates to the field of material chemistry, in particular to a preparation method and application of a highly efficient and ordered ternary titanium-aluminum-tin alloy oxide nanotube array. Background technique [0002] Advanced oxidative degradation is one of the important ways to deal with environmental pollutants. As an advanced deep oxidation technology, photocatalytic oxidation has the advantages of strong oxidation ability, high controllability, mild reaction conditions, easy preparation of materials, and no direct secondary pollution. It provides a new way for the treatment of environmental pollution. It is a promising approach and has attracted widespread attention, and the direct and effective use of sunlight to photocatalytically oxidize and degrade environmental pollutants is undoubtedly the development trend in the field of environmental control in the future. Among numerous photocatalysts, nanostructured TiO 2 Due to its re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C02F1/46C02F1/30C02F1/72
CPCY02W10/37
Inventor 赵国华李明芳赵红颖刘梅川
Owner TONGJI UNIV
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