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A kind of aluminum, vanadium co-doped double-layer porous wall titanium alloy nanotube array visible light catalyst and its preparation method and application

A nanotube array, titanium alloy technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. Complex preparation, low utilization of sunlight, etc., to achieve the effects of excellent visible light catalytic performance, rich pore structure, and independent tube wall

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the complex preparation of special-morphology nanotube arrays faced by the prior art, the use of reagents is not environmentally friendly, the tube walls of the prepared nanotube arrays are shared, the utilization rate of sunlight is low, and the oxide film is easy to detach from the substrate, which is unfavorable for recovery. etc., providing an aluminum, vanadium co-doped double-layer porous wall titanium alloy nanotube array visible light catalyst and its preparation method

Method used

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  • A kind of aluminum, vanadium co-doped double-layer porous wall titanium alloy nanotube array visible light catalyst and its preparation method and application
  • A kind of aluminum, vanadium co-doped double-layer porous wall titanium alloy nanotube array visible light catalyst and its preparation method and application
  • A kind of aluminum, vanadium co-doped double-layer porous wall titanium alloy nanotube array visible light catalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Titanium alloy pretreatment: Process titanium alloy sheet TC4 into a sheet shape of 20 mm × 30 mm × 2 mm, put it into absolute ethanol and deionized water for 20 minutes, and dry at room temperature for 2 hours. The main chemical properties of the alloy titanium sheet TC4 used are: The composition is: Ti: 89.43%, Al: 6.01%, V: 2.64%, C: 1.92%.

[0035] (2) Electrochemical polishing: a two-electrode system is used, and the cathode is a pure titanium sheet (the effective area is 400mm 2 ), the anode is titanium alloy TC4, the area to be polished is 2×400mm 2, The distance between the two electrodes is 3cm, the electrolyte is NaCl in ethylene glycol solution, and the chloride ion concentration is 1mol / L. Polish at room temperature for 10 minutes under 30V DC constant voltage, put into absolute ethanol and deionized water for 20 minutes each, and dry at room temperature for 2 hours.

[0036] (3) Anodizing: Two-electrode system is used, the cathode is pure titanium she...

Embodiment 2

[0038] (1) Titanium alloy pretreatment: Process titanium alloy sheet TC4 into a sheet shape of 20 mm × 30 mm × 2 mm, put it into absolute ethanol and deionized water for 20 minutes, and dry at room temperature for 2 hours. The main chemical properties of the alloy titanium sheet TC4 used are: The composition is: Ti: 89.43%, Al: 6.01%, V: 2.64%, C: 1.92%.

[0039] (2) Electrochemical polishing: a two-electrode system is used, and the cathode is a pure titanium sheet (the effective area is 400mm 2 ), the anode is titanium alloy TC4, the area to be polished is 2×400mm 2 , The distance between the two electrodes is 3cm, the electrolyte is NaCl in ethylene glycol solution, and the chloride ion concentration is 1mol / L. Polish at room temperature for 10 minutes under 30V DC constant voltage, put into absolute ethanol and deionized water for 20 minutes each, and dry at room temperature for 2 hours.

[0040] (3) Anodizing: Two-electrode system is used, the cathode is pure titanium sh...

Embodiment 3

[0042] (1) Preparation of anatase aluminum and vanadium co-doped double-layer porous-walled titanium alloy nanotube arrays: the double-walled amorphous aluminum and vanadium co-doped titanium alloy nanotube arrays prepared in Example 1 were placed in a Calcined at 500°C for 2h in a Furnace, air atmosphere. The temperature rise program is firstly raised from room temperature to 250°C at a rate of 2°C / min, kept at 250°C for 30 minutes, raised to 500°C at a rate of 1°C / min, kept at a constant temperature for 2 hours, and finally dropped to room temperature at a rate of 3°C / min. Anatase aluminum and vanadium co-doped double-layer porous wall titanium alloy nanotube arrays were obtained, which were denoted as DW-ATNTAs.

[0043] (2) Preparation of anatase aluminum, vanadium co-doped single-layer porous-walled titanium alloy nanotube array: the single-walled amorphous aluminum-vanadium co-doped titanium alloy nanotube array prepared in Example 2 was placed in a Calcined at 500°C fo...

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Abstract

The invention discloses an aluminum and vanadium co-doped double-layer porous wall titanium alloy nanotube array visible light catalyst and its preparation method and application. The double-walled nanotube array has a special morphology with a porous inner wall and a smooth outer wall. The mass percentage chemical composition is: aluminum: 3.05~6.01%, vanadium: 2.35~2.87%, oxygen: 20.14~30.83%, and the rest For titanium. The invention has a regular independent tube wall array structure, a special morphology with porous inner walls and smooth outer walls, good visible light response, fast electron transmission channels and greater adsorption performance. Its visible light catalytic performance is significantly enhanced compared with pure titanium nanotube arrays. The invention has great potential in terms of sunlight utilization efficiency and photogenerated electron hole separation ability, and can be widely used in photocatalysis and photoelectrocatalytic wastewater treatment, air purification and other aspects.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, in particular to an aluminum and vanadium co-doped double-layer porous wall titanium alloy nanotube array visible light catalyst and a preparation method thereof. Background technique [0002] In recent years, TiO 2 Nanotubes have broad application prospects in the fields of solar cells, photocatalysis, photolysis of water, drug delivery, and sensors due to their spatially ordered dispersion, single-channel electron transport capability, and good electrochemical contact with substrates. extensive attention of researchers. [0003] in TiO 2 Among the main synthesis methods of nanotubes, electrochemical anodization is the most widely used, and has great advantages such as simple operation, strong versatility, low cost, and good shape controllability. while TiO 2 The performance of nanotubes depends largely on the crystallinity and the surface area of ​​the nanotubes. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B01J37/34B82Y30/00B82Y40/00C25D11/26C02F1/30B01D53/86
CPCB01D53/86C25D11/26B82Y30/00B82Y40/00C02F1/30B01J23/002B01J23/22B01J37/343B01J37/348C02F2305/10B01D2255/802B01J35/39B01J35/33
Inventor 胡芸游素珍韦朝海
Owner SOUTH CHINA UNIV OF TECH
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